Application of Notch Filtering under Low Sampling Rate for Broken Rotor Bar Detection with DTFT and AR based Spectrum Methods
|
|
- Ezra Walker
- 6 years ago
- Views:
Transcription
1 Alication of Notch Filtering under Low Samling Rate for Broken Rotor Bar Detection with DTFT and AR based Sectrum Methods B. Ayhan H. J. Trussell M.-Y. Chow M.-H. Song IEEE Student Member IEEE Fellow IEEE Senior Member IEEE Member Abstract- In this work, we have demonstrated with exerimental results that the use of a lower samling rate with a notch filter is feasible for motor current signature analysis in broken rotor bar detection with DTFT (Discrete Time Fourier Transform) and AR (Auto Regressive) based sectrum methods. The use of the lower samling rate does not affect the erformance of the fault detection, while requiring much less comutation and low-cost in imlementation, which would make it easier to imlement in embedded systems for motor condition monitoring. Index Terms-- Fault Diagnosis, Sectral Analysis, Induction Motors, Broken Rotor Bar, MCSA I. INTRODUCTION Induction motors have dominated in the field of electromechanical energy conversion by having 80% of the motors in use [1]. The alications of induction motors are widesread. The failure of induction motors can result in a total loss of the machine itself, in addition to a likely costly downtime of the whole lant. More imortant, these failures may even result in the loss of lives, which cannot be tolerated. Thus, health monitoring techniques to revent induction motor failures are of great concern in industry and are gaining increasing attention [2]-[3]. Rotor failures are among these failures and they now account for the 5-10% of total induction motor failures [4]. Since 1980, the broken rotor bar fault detection roblem has created substantial interest among researchers. Several monitoring techniques have been develoed, most of which are based on vibration, thermal and motor current signature monitoring (MCSA) [5]. MCSA techniques are gaining more attention because of their easiness to use since they do not require access to the motor [6]. In recent years, several advanced signal rocessing techniques have been alied for motor current signature analysis. Some of these techniques are High Resolution Sectral Analysis, Higher Order Statistics and Wavelet Analysis [1], [6]. The broken rotor bar secific frequencies, which are also called the sideband frequencies, are located around the main line frequency. The difference (in frequency) between the closest sideband and the main line frequency deends on the motor sli factor. Motor sli factor is found using the motor rotor seed where higher sli values indicate higher motor load conditions, and lower sli values corresond to lower load conditions. The difference (in frequency) between the closest sideband and the main line frequency narrows down as the motor goes to a lower load condition. Thus, the frequency resolution must be selected higher than the difference between the closest sideband and the main line frequency; otherwise, the comuted sectrum amlitudes at the sideband frequencies will not be detected, since the resolution would not be adequate enough to show the sidebands. In sectral analysis, in addition to the tye of the windowing function and the length of the window, the samling rate determines the frequency resolution. Thus, the selection of the samling rate is imortant. In revious works regarding the sectrum analysis of broken rotor bar fault, in [7], 2 khz is alied, in [8], 1.5 khz is used, and in [6], 1 khz is alied as the samling rate. However, there is not much discussion secific to the selection of the samling rate. In this work, we have alied a lower samling rate of 200 Hz. One of the reasons that we select 200 Hz is that, the sidebands of interest are in the Hz region, thus higher frequency regions will not rovide any information, and a samling rate of 200 Hz is believed to rovide good erformance without any aliasing effects. With the alied 200 Hz samling rate and different windowing functions used with DTFT, the frequency resolution in this work takes a value between 1-6 Hz where the difference between the closest sideband and the main line frequency is 9.30± 0.77 Hz. Another reason is that, a notch filter, which will not cause any significant suression at the sidebands, can be designed efficiently at a lower samling rate of 200 Hz. In addition to these reasons, from a general oint of view, the use of a lower samling rate results in much less comutation and lowcost in imlementation. Thus, it would be easier to design embedded systems with resect to software and hardware imlementation for motor condition monitoring alications. In this work, the induction motor current data used is collected from an actual exeriment setu in a laboratory environment. The exeriments have been carried out under full load condition of the motor. The healthy and one broken rotor bar motor current data are samled at 10 khz in order to allow a wide range of study with the samling rate. The detection of the faults is done at this rate. Then the data are decimated in order to decrease the original samling rate that is alied in the exeriments to a lower value, 200 Hz, and show that the use of the lower samling rate does not affect the erformance of the fault detection. The nonarametric sectrum method DTFT and the arametric method Yule-AR have been alied with the lower samling rate. Throughout the sectrum 1
2 comutation, only the sectrum amlitudes at the lower and uer sideband broken rotor bar fault secific frequencies are comuted, rather than comuting the overall sectrum. In this way, exact sectrum amlitudes are obtained, which imroves the healthy-faulty discrimination erformance, and decrease the comutational cost considerably. The results indicate that the sidebands can be clearly seen with DTFT, while the sidebands can not be detected with the Yule-AR method. Thus, a second order notch filter is designed to suress the main line frequency and isolate the broken rotor bar secific sideband frequencies for the Yule-AR method. This allows the identification of the characteristic sidebands. The sectrum amlitudes of the healthy and one broken rotor bar motor data resulting from each technique are evaluated using a statistical measure based on a hyothesis test with resect to determining the feature extraction erformance. This aer is organized as follows: Section II discusses the frequencies of interest to detect the broken rotor bar fault. Section III resents the exeriment setu and motor data secifications. The exerimental results and statistical analysis are described in Section IV. Finally, Section V concludes the findings of this work. II. BROKEN ROTOR BAR FREQUENCY SIGNATURES Kliman, Elkasabgy [9]-[10] used motor current signature analysis (MCSA) methods to detect broken rotor bar faults by investigating the sideband comonents around the sulied current fundamental frequency (i.e. the line frequency), f o : f = (1± 2) s f, (1) b where f b are the sideband frequencies associated with the broken rotor bar, s is the er unit motor sli. The sli s is defined as the relative mechanical seed of the motor, n m, with resect to the motor synchronous seed, n s, as: ns nm s =. (2) n The motor synchronous seed, n s, is related to the line frequency f o as: 120 f n o s =, (3) P where P is the number of oles of the motor and constant 120 is used to exress the motor synchronous seed, n, in revolutions er minute (rm) unit. III. EXPERIMENT SETUP AND MOTOR DATA SPECIFICATIONS In order to investigate the feature extraction erformance of the two investigated MCSA techniques for the broken rotor bar detection roblem under a lower samling rate, we erformed exeriments on an actual induction motor. The characteristics of the 3-hase induction motor used in our exeriment are listed in Table I. The motor was tested with a healthy rotor and with a faulty rotor that had one broken rotor bar. The broken rotor bar fault was induced by filling one of the rotor bars full with anchoring cement before the die-casting rocess. Anchoring cement is a high strength, fast-setting s o s gysum cement with low conductivity. The overall data collection scheme and the actual exeriment setu icture are deicted in Fig. 1 and Fig. 2, resectively. Table I. Induction motor characteristics used in the exeriment. Descrition Value Power 0.75 kw (1H) Inut Voltage 380 V Full Load Current 2.2 A Suly Frequency 60 Hz Number of Poles 4 Number of Rotor Slots 44 Number of Stator Slots 36 Full Load Torque 0.43 kg m Full Load Seed 1690 rm The induction motor was fed through a 3 hase ABB, ACS 501 inverter. A Tektronix TM 5003 current amlifier amlifies the induction motor stator currents before being sent to the interfacing Pentium PC through the oscilloscoe. The needed load condition of the induction motor was established by connecting the test motor to a DC Motor, which is used as a generator and is caable of simulating any desired load condition. The seed of the induction motor was measured by a digital stroboscoe. The exeriments involved collecting three hase stator induction motor current and seed data for the full load condition of the motor both with one broken rotor bar fault and without any fault. The motor load condition is determined according to the motor namelate information given in Table I. Thus, there are two different exeriment cases: healthy motor (no broken bar) under full load and motor with one broken rotor bar under full load. For each individual case, 20 sets of motor current data were collected with samling rate 10 khz, Fs=10 khz. Thus, each motor current data set contains 10,000 samles for a duration of one second. IV. EXPERIMENTAL RESULTS AND ANALYSIS As described in Section II, broken rotor bar fault secific frequencies deend on motor s sli, which is a function of motor s synchronous seed and motor s actual seed. In this study, we investigate the sectrum amlitudes of the motor current (hase-a) at the two frequencies secific to broken rotor bar fault. These two frequencies are the first lower and uer sidebands, (1 2) s f o and (1+ 2) s f o, resectively, which are derived from equation (1). Finding the sectrum amlitudes at the actual frequency comonents, f, which are secific to broken b rotor bar fault, is imortant in order to make an accurate decision about the existence of a fault. These frequency comonents are comuted by first incororating the actual motor seed data values into equation (2) to find the sli 2
3 values. The comuted sli values are then used in (1) to find the frequency comonents. According to the exerimental data, motor seed under full load condition varies between 1649 and 1672 rm. Thus, using equation (1), the lower sideband frequency location is found to vary between Hz, while the uer sideband frequency location varies between Hz. The motor current data is decimated with a decimation rate of 50. In this way, the samling rate is reduced by a factor of 50, Fs=200 Hz. Fig. 3 deicts the DTFT sectrums of the decimated healthy and faulty motor current data with Hanning window. The lower and uer sidebands should be examined at Hz and Hz according to the corresonding seed data. In Fig. 3, these frequency locations are marked with vertical lines. The solid line reresents the sectrum of the healthy motor data, and the dashed line corresonds to the sectrum of the broken rotor bar data. From Fig. 3, it can be clearly seen that the sidebands of interest can be detected by the DTFT method with the lower samling rate, Fs=200 Hz. For the feature extraction erformance analysis of the two investigated methods, we will comute the DTFT at only the two sideband frequencies, (1± 2) s f o, which are indicated by the vertical lines in Fig. 3. Fig. 4 deicts the Yule-AR sectrum of the decimated healthy and faulty motor current data with a model order of 30. Unlike the DTFT method, the two sidebands can not be seen, since the dominance of the main line frequency does not allow the sidebands to aear with the Yule-AR method. Thus, a filtering rocess is needed in order to suress the main line frequency. In art A of this section, the filter design rocess is introduced, which will enable the Yule- AR method to be alicable for broken rotor bar detection. A. Notch filter design The motivation behind alying a notch filter is to isolate the two sidebands of interest by suressing the dominance of the main line frequency, such that Yule-AR method can be successfully alied for broken rotor bar detection. At the lower samling rate of Fs=200 Hz, the notch filter can be imlemented effectively for reasonable ole radii, r. We have evaluated the magnitude resonses of several filter designs and considered their transient resonse, when alied to motor current data. The sectrums in Fig. 5 corresond to the same healthy and broken rotor motor current data airs that were used in Fig. 3-Fig. 4. A model order of 30 has been alied in the Yule-AR method. Before alying Yule-AR, the decimated motor current data is filtered with a second order notch filter, having a r value of Fig. 5 verifies that the lower and uer sidebands can be successfully detected after notch filtering with the Yule-AR method with a lower samling rate, Fs=200 Hz. Fig. 6 illustrates that the sidebands can also be seen with the notch filtered data using DTFT (with Hanning window) under Fs=200 Hz. Fig. 1. Motor data collection scheme. Fig. 2. Actual exeriment setu. 3
4 Fig. 3. DTFT of a healthy and faulty motor current data with Hanning window (no filtering alied, Fs = 200 Hz). Fig. 4. Yule-AR sectrum of the decimated data (Fs=200 Hz, model order 30). Fig. 5. Yule-AR sectrum of the notch filtered data with Fs=200 Hz. In order to illustrate that the lower samling rate with a notch filter can be successfully alied for broken rotor bar detection with the two investigated sectrum methods; we have incororated a erformance measure in our analyses. We use t-test -value results to determine if the hyothesis test is significant with the sectrum data under investigation [11]. In general, the t-test allows us to assess whether the means of two grous are statistically different from each other. In our case the two grous under comarison are healthy and faulty sectrum estimates under the full load condition of the motor. The numerical value that the -value yields is a robability value, which gives information on whether the two grous differ from each other and at what degree. As - values get smaller, the discrimination between the two grous becomes more significant. In the remaining arts of this section, we will show the feature extraction erformance of the two investigated techniques. For the DTFT method, we will consider three cases: higher samling rate with no filtering, lower samling rate (after decimation) with no filtering, and lower samling rate with notch filter. For the Yule-AR method, we will consider the lower samling rate with no filtering and lower samling rate with notch filter cases only. This is because Fig. 6. DTFT of the notch filtered data with Fs=200 Hz. with the Yule-AR method the sidebands of interest can not be seen without filtering. Thus, the case of higher samling rate with no filtering is of no use. B. Feature extraction erformance of DTFT In this work, we have considered several windowing techniques when alying the DTFT method since the tye of the windowing technique is a significant factor that affects the feature extraction erformance. We have alied eight different windows with the DTFT method: rectangular, triangular, Hamming, Gaussian, Hanning, Parzen, Nuttall, and Chebyschev (100 db). Table II and Table III deict the -values for the DTFT method with the alied eight windows at the lower and uer sidebands for the three cases. It has to be noted that filtering results in the generation of an unsteady outut data ortion. In the comutation of the sectrum amlitudes, only steady state data ortion is considered, that is, we have avoided using the transient ortions. Among the alied windows, for the higher samling rate with no filtering and lower samling rate with no filtering cases, Hanning, Parzen, Nuttall, and Chebyschev (100dB) windows rovide high healthy-faulty discrimination erformance, while rectangular, triangular, Gaussian, and Hamming windows are not 4
5 satisfactory. This is caused by the leakage of the main line frequency. From Fig. 3, it can be seen that the db magnitude of the main line frequency ( f o =60 Hz) signal, is about 50 db above the sideband signals. In order to avoid leakage effects on the sidebands, the main line frequency needs to be suressed more than 50 db. The rectangular, triangular, Hamming and Gaussian windows barely suress the main line frequency, and are not adequate for suression of 50 db and above. On the other hand, Hanning, Parzen, Nuttall, and Chebyschev (100dB) rovide adequate suression. A second way to suress the main line frequency is with a notch filter. For the lower samling rate with notch filter case, all windows rovide satisfactory results, as exected. It is also observed that the Hamming window generates considerably lower -values after notch filtering, and the uer sideband, (1+ 2) s f o, has more discriminative information when comared to the lower sideband, (1 2) s f o. In order to give a visual insight to the reader about the relation between the - value and the discrimination rate, Fig. 7 and Fig. 8 deict the DTFT amlitudes of the notch filtered healthy and faulty data sets with Fs=200 Hz for the lower and uer sidebands, resectively. In Fig. 7 and Fig. 8, the alied second order notch filter has a r value of 0.91, and the DTFT amlitudes are comuted with a Hamming window that has a window size of 150. C. Feature extraction erformance of Yule-AR Table IV deicts the -values with resect to the Yule- AR method at the lower and uer sidebands for the lower samling rate with no filtering case. From Table IV, we can see that no useful classification is ossible without suressing the dominant main line frequency. Table V deicts the -values with resect to the Yule- AR method at the lower sideband for the lower samling rate with notch filtering case. In Table V, -values corresond to different combinations of model orders and ole radius of notch filters. It is observed that a -value as low as 3.26e-9 is obtained with r equal to 0.91 and model order 30. Similarly, Table VI deicts the -values with resect to the Yule-AR method at the uer sideband for the lower samling rate with notch filtering case. It is examined that a -value of 5.70e-22 has been obtained with r equal to 0.85 and model order 90. The X in Table V and Table VI indicate that the Yule-AR sectrum can not be comuted since the data length is smaller than the alied model order for these cases. With resect to Table V and Table VI, as the oles of the notch filter get closer to the unit circle, the imulse resonse of the filter gets longer and the length of the usable data becomes smaller. Thus, we get no results or oor -values for these cases. Before alying filtering, Yule-AR results are useless because of not roviding any information in terms of healthyfaulty discrimination, as can be seen from the -values deicted in Table IV. After filtering, the dominance of the main line frequency is suressed, and the sidebands are significantly isolated. The decimation results indicate that a lower initial samling rate can be used for broken rotor bar fault detection with DTFT method. It is the alied window function that makes a dee imact on the feature extraction erformance with the nonarametric sectrum methods. For examle, alying a rectangular window without notch filtering of the motor current data generates misleading results in the DTFT method. There is no need for filtering with the DTFT method if a window function that can significantly reduce the sectral leakage effects is alied. Table II. -values for DTFT with different windows for the lower sideband for the three cases. Window tye (1 2) s f o no filtering (1+ 2) s f o no filtering (1+ 2) s f o notch filtering winsize:10,000,fs:10kh winsize:200, Fs=200 Hz winsize:150, r =0.91,Fs=200 Hz z Rectangular e-007 Triangular e-008 Hamming e-008 Gaussian e-008 Hanning e e e-008 Parzen e e e-007 Nuttall e e e-007 Chebyschev (100 db) e e e-007 Table III. -values for DTFT with different windows for the uer sideband for the three cases. Window tye (1+ 2) s f o no filtering (1+ 2) s f o no filtering (1+ 2) s f o notch filtering winsize:10,000,fs:10kh winsize:200, Fs=200 Hz winsize:150, r =0.91, Fs=200 Hz z Rectangular e-018 Triangular e-024 Hamming e-024 5
6 Gaussian e e e-024 Hanning e e e-023 Parzen e e e-022 Nuttall e e e-021 Chebyschev (100 db) e e e-022 Fig. 7. DTFT amlitudes of the notch filtered healthy and faulty data sets at the lower sideband. Fig. 8. DTFT amlitudes of the notch filtered healthy and faulty data sets at the uer sideband. Table IV. -values with resect to Yule-AR for the lower and uer sidebands (no filtering, Fs=200 Hz). Model order Sideband (1 2) s f o (1+ 2) s f o Table V. -values with resect to Yule-AR for the lower sideband (notch filtering, Fs=200 Hz). Filter Model order r e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e X X X X X Table VI. -values with resect to Yule-AR for the uer sideband (notch filtering, Fs=200 Hz). Filter Model order r e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e e-11 X e e e X X X X In order to aly the Yule-AR method for broken rotor bar detection, the dominance of the main line frequency must be suressed. Otherwise, the sidebands of interest, can not be extracted even high model orders are used. The suression of the main line frequency and isolation of the sidebands can be done by alying a second order notch filter. After notch filtering, Yule-AR can be alied successfully, and rovide accurate healthy-faulty discrimination as the DTFT method. V. CONCLUSION This aer has illustrated with exerimental results that a lower samling rate with a notch filter can be successfully alied with the DTFT and AR based sectrum methods for the broken bar detection roblem and the use of the lower samling rate does not affect the erformance of the fault 6
7 detection. The utilization of a lower samling rate is significantly imortant because lower samling rate means less comutation and low-cost in imlementation which could lead to more effective and less costly embedded system designs for motor condition monitoring alications. REFERENCES [1] M.E.H. Benbouzid, G.B. Kliman, What stator current rocessing based technique to use for induction motor rotor faults diagnosis?, IEEE Power Engineering Review, August [2] B. Li, M.-Y. Chow, Y. Tisuwan, J.C. Hung, Neural-networkbased motor rolling bearing fault diagnosis, IEEE Trans. Industrial Electronics on, vol. 47, no. 5, Oct. 2000, [3] S. Altug, M.-Y. Chow, H.J. Trussell, Fuzzy inference systems imlemented on neural architectures for motor fault detection and diagnosis, IEEE Trans. on Industrial Electronics, vol. 46, no. 6, Dec. 1999, [4] M. Haji, H. A. Toliyat, Pattern recognition a technique for induction machines rotor broken bar detection, IEEE Trans. on Energy Conversion, vol. 16, no. 4, Dec. 2001, [5] G. B. Kliman, J. Stein, Methods of motor current signature analysis, Electric machines and ower systems, , [6] M.E.H. Benbouzid, M. Vieira, C. Theys, Induction motors faults detection and localization using stator current advanced signal rocessing techniques, IEEE Trans. on Power Electronics, vol. 14, no. 1, Jan. 1999, [7] G. Didier, and et al., Rotor cage fault detection in induction motor using global modulation index on the instanteneous ower sectrum, SDEMPED 2003, Atlanta, GA, USA, August [8] F. Cuertino et al., Comarison of sectral estimation techniques alied to induction motor broken bars detection, SDEMPED 2003, Atlanta, GA, USA, August [9] G. B. Kliman et al., Non-invasive detection of broken rotor bars in oerating induction motors, IEEE Trans. on Energy Conversion vol. EC-3, no. 4, , [10] N.M. Elkasabgy, A. R. Eastham, G. E. Dawson, Detection of broken bars in the cage rotor on an induction machine, IEEE Trans. on Industrial Alications, vol. IA-22, no. 6, , Jan/Feb [11] D.C. Montgomery, G.C. Runger, N.F. Hubele, Engineering Statistics, John Wiley & Sons, New York,
A Genetic Algorithm Approach for Sensorless Speed Estimation by using Rotor Slot Harmonics
A Genetic Algorithm Aroach for Sensorless Seed Estimation by using Rotor Slot Harmonics Hayri Arabaci Abstract In this aer a sensorless seed estimation method with genetic algorithm for squirrel cage induction
More informationEXPERIMENT 6 CLOSED-LOOP TEMPERATURE CONTROL OF AN ELECTRICAL HEATER
YEDITEPE UNIVERSITY ENGINEERING & ARCHITECTURE FACULTY INDUSTRIAL ELECTRONICS LABORATORY EE 432 INDUSTRIAL ELECTRONICS EXPERIMENT 6 CLOSED-LOOP TEMPERATURE CONTROL OF AN ELECTRICAL HEATER Introduction:
More informationOrigins of Stator Current Spectra in DFIGs with Winding Faults and Excitation Asymmetries
Origins of Stator Current Sectra in DFIGs with Wing Faults and Excitation Asymmetries S. Williamson * and S. Djurović * University of Surrey, Guildford, Surrey GU2 7XH, United Kingdom School of Electrical
More informationOnline Adaptive Continuous Wavelet Transform and Fuzzy Logic Based High Precision Fault Detection of Broken Rotor Bars for IM
Science Research 206; 4(6): 57-68 htt://www.scienceublishinggrou.com/j/sr doi: 0.648/j.sr.2060406.3 ISSN: 2329-0935 (Print); ISSN: 2329-0927 (Online) Online Adative Continuous Wavelet Transform and Fuzzy
More informationHigh resolution radar signal detection based on feature analysis
Available online www.jocr.com Journal of Chemical and Pharmaceutical Research, 4, 6(6):73-77 Research Article ISSN : 975-7384 CODEN(USA) : JCPRC5 High resolution radar signal detection based on feature
More informationAn Overview of Substrate Noise Reduction Techniques
An Overview of Substrate Noise Reduction Techniques Shahab Ardalan, and Manoj Sachdev ardalan@ieee.org, msachdev@ece.uwaterloo.ca Deartment of Electrical and Comuter Engineering University of Waterloo
More informationLab 4: The transformer
ab 4: The transformer EEC 305 July 8 05 Read this lab before your lab eriod and answer the questions marked as relaboratory. You must show your re-laboratory answers to the TA rior to starting the lab.
More informationAn Adaptive Narrowband Interference Excision Filter with Low Signal Loss for GPS Receivers
ICCAS5 An Adative Narrowband Filter with Low Signal Loss for GPS s Mi-Young Shin*, Chansik Park +, Ho-Keun Lee #, Dae-Yearl Lee #, and Sang-Jeong Lee ** * Deartment of Electronics Engineering, Chungnam
More informationApplication Note D. Dynamic Torque Measurement
Page 1 of 9 Alication Note 221101D Dynamic Torque Measurement Background Rotary ower sources and absorbers have discrete oles and/or istons and/or gear meshes, etc. As a result, they develo and absorb
More informationUniversity of Twente
University of Twente Faculty of Electrical Engineering, Mathematics & Comuter Science Design of an audio ower amlifier with a notch in the outut imedance Remco Twelkemeijer MSc. Thesis May 008 Suervisors:
More informationDesign of PID Controller Based on an Expert System
International Journal of Comuter, Consumer and Control (IJ3C), Vol. 3, No.1 (014) 31 Design of PID Controller Based on an Exert System Wei Li Abstract For the instability of traditional control systems,
More informationIMPROVED POLYNOMIAL TRANSITION REGIONS ALGORITHM FOR ALIAS-SUPPRESSED SIGNAL SYNTHESIS
IMPROVED POLYNOMIAL TRANSITION REGIONS ALGORITHM FOR ALIAS-SUPPRESSED SIGNAL SYNTHESIS Dániel Ambrits and Balázs Bank Budaest University of Technology and Economics, Det. of Measurement and Information
More informationA Novel, Robust DSP-Based Indirect Rotor Position Estimation for Permanent Magnet AC Motors Without Rotor Saliency
IEEE TANSACTIONS ON POWE EECTONICS, VO. 18, NO. 2, MACH 2003 539 A Novel, obust DSP-Based Indirect otor Position Estimation for Permanent Magnet AC Motors Without otor Saliency i Ying and Nesimi Ertugrul,
More informationCHAPTER 5 INTERNAL MODEL CONTROL STRATEGY. The Internal Model Control (IMC) based approach for PID controller
CHAPTER 5 INTERNAL MODEL CONTROL STRATEGY 5. INTRODUCTION The Internal Model Control (IMC) based aroach for PID controller design can be used to control alications in industries. It is because, for ractical
More informationServo Mechanism Technique based Anti-Reset Windup PI Controller for Pressure Process Station
Indian Journal of Science and Technology, Vol 9(11), DOI: 10.17485/ijst/2016/v9i11/89298, March 2016 ISSN (Print) : 0974-6846 ISSN (Online) : 0974-5645 Servo Mechanism Technique based Anti-Reset Windu
More informationGround Clutter Canceling with a Regression Filter
1364 JOURNAL OF ATMOSPHERIC AND OCEANIC TECHNOLOGY VOLUME 16 Ground Clutter Canceling with a Regression Filter SEBASTIÁN M. TORRES Cooerative Institute for Mesoscale Meteorological Studies, Norman, Oklahoma
More informationA New ISPWM Switching Technique for THD Reduction in Custom Power Devices
A New ISPWM Switching Technique for THD Reduction in Custom Power Devices S. Esmaeili Jafarabadi, G. B. Gharehetian Deartment of Electrical Engineering, Amirkabir University of Technology, 15914 Tehran,
More informationControl of Grid Integrated Voltage Source Converters under Unbalanced Conditions
Jon Are Suul Control of Grid Integrated Voltage Source Converters under Unbalanced Conditions Develoment of an On-line Frequency-adative Virtual Flux-based Aroach Thesis for the degree of Philosohiae Doctor
More informationA Comparative Study on Compensating Current Generation Algorithms for Shunt Active Filter under Non-linear Load Conditions
International Journal of Scientific and Research Publications, Volume 3, Issue 6, June 2013 1 A Comarative Study on Comensating Current Generation Algorithms for Shunt Active Filter under Non-linear Conditions
More informationMeasurement of Field Complex Noise Using a Novel Acoustic Detection System
Southern Illinois University Carbondale OenSIUC Conference Proceedings Deartment of Electrical and Comuter Engineering Fall 04 Measurement of Field Comlex Noise Using a Novel Acoustic Detection System
More informationROTOR FAULTS DETECTION IN SQUIRREL-CAGE INDUCTION MOTORS BY CURRENT SIGNATURE ANALYSIS
ROTOR FAULTS DETECTION IN SQUIRREL-CAGE INDUCTION MOTORS BY CURRENT SIGNATURE ANALYSIS SZABÓ Loránd DOBAI Jenő Barna BIRÓ Károly Ágoston Technical University of Cluj (Romania) 400750 Cluj, P.O. Box 358,
More informationA fast hysteresis control strategy based on capacitor charging and discharging
LETTER A fast hysteresis control strategy based on caacitor charging and discharging Jianfeng Dai, Jinbin Zhao a), Keqing Qu, and Ming Lin College of Electrical Engineering, Shanghai University of electric
More informationChapter 7: Passive Filters
EETOMAGNETI OMPATIBIITY HANDBOOK 1 hater 7: Passive Filters 7.1 eeat the analytical analysis given in this chater for the low-ass filter for an filter in shunt with the load. The and for this filter are
More informationFrequency Converter Influence on Induction Motor Rotor Faults Detection Using Motor Current Signature Analysis Experimental Research
SDEMPED 03 Symposium on Diagnostics for Electric Machines, Power Electronics and Drives Atlanta, GA, USA, 24-26 August 03 Frequency Converter Influence on Induction Motor Rotor Faults Detection Using Motor
More informationInvestigation on Channel Estimation techniques for MIMO- OFDM System for QAM/QPSK Modulation
International Journal Of Comutational Engineering Research (ijceronline.com) Vol. 2 Issue. Investigation on Channel Estimation techniques for MIMO- OFDM System for QAM/QPSK Modulation Rajbir Kaur 1, Charanjit
More informationPostprocessed time-delay interferometry for LISA
PHYSICAL REVIEW D, VOLUME 70, 081101(R) Postrocessed time-delay interferometry for LISA D. A. Shaddock,* B. Ware, R. E. Sero, and M. Vallisneri Jet Proulsion Laboratory, California Institute of Technology,
More informationT- filters based dual-control dimmable electronic ballast
3rd International Conference on Mechatronics, obotics and Automation (ICMA 5 T- filters based dual-control dimmable electronic ballast Huadong Wang, a,xu Cai, b,lili Liu Electronic Information and Electrical
More informationSpeech Signals Enhancement Using LPC Analysis. based on Inverse Fourier Methods
Contemorary Engineering Sciences, Vol., 009, no. 1, 1-15 Seech Signals Enhancement Using LPC Analysis based on Inverse Fourier Methods Mostafa Hydari, Mohammad Reza Karami Deartment of Comuter Engineering,
More informationFull Bridge Single Stage Electronic Ballast for a 250 W High Pressure Sodium Lamp
Full Bridge Single Stage Electronic Ballast for a 50 W High Pressure Sodium am Abstract In this aer will be reorted the study and imlementation of a single stage High Power Factor (HPF) electronic ballast
More informationHigh-efficiency of MHz Inverter Constructed from Frequency Multiplying Circuit
High-efficiency of MHz Inverter Constructed from Frequency Multilying Circuit Koji Orikawa, Jun-ichi Itoh Deartment of Electrical Engineering Nagaoka University of Technology Nagaoka, Jaan orikawa@vos.nagaokaut.ac.j
More informationSelf-Driven Phase Shifted Full Bridge Converter for Telecom Applications
Self-Driven Phase Shifted Full Bridge Converter for Telecom Alications SEVILAY CETIN Technology Faculty Pamukkale University 7 Kinikli Denizli TURKEY scetin@au.edu.tr Abstract: - For medium ower alications,
More informationSine-wave three phase resonance inverter for operation of renewable energy systemsr MOEIN KHOSRAVI 1
JASEM ISSN 1119-8362 All rights reserved Full-text Available Online at www.ajol.info and www.bioline.org.br/ja J. Al. Sci. Environ. Manage. Setember 214 Vol. 18 (3) 1-21 Sine-wave three hase resonance
More informationDESIGN AND FABRICATION OF A DEEP DRAWING MACHINE: EXPERIMENTAL STUDY OF DRAWING FORCE VS DRAWING STROKE
DESIGN AND FABRICATION OF A DEEP DRAWING MACHINE: EXPERIMENTAL STUDY OF DRAWING FORCE VS DRAWING STROKE Ahmed Ramahi, ramahi@najah.edu, a_ramahi@yahoo.com. Industrial Engineering Deartment, An-Najah National
More informationElectronic Ballast with Wide Dimming Range: Matlab-Simulink Implementation of a Double Exponential Fluorescent-Lamp Model
Electronic Ballast with Wide Dimming ange: Matlab-Simulink Imlementation of a Double Exonential Fluorescent-Lam Model Marina Perdigão and E. S. Saraiva Deartamento de Engenharia Electrotécnica Instituto
More informationOptimization of an Evaluation Function of the 4-sided Dominoes Game Using a Genetic Algorithm
o Otimization of an Evaluation Function of the 4-sided Dominoes Game Using a Genetic Algorithm Nirvana S. Antonio, Cícero F. F. Costa Filho, Marly G. F. Costa, Rafael Padilla Abstract In 4-sided dominoes,
More informationModeling and simulation of level control phenomena in a non-linear system
www.ijiarec.com ISSN:2348-2079 Volume-5 Issue- International Journal of Intellectual Advancements and Research in Engineering Comutations Modeling and simulation of level control henomena in a non-linear
More informationAnalysis and Control of Three Phase PWM Rectifier for Power Factor Improvement of IM Drive
htt://dx.doi.org/0.272/ijiet.02.9 Analysis and Control of Three Phase PWM Rectifier for Power Factor Imrovement of IM Drive Ajesh P S, Jisha Kuruvila P 2, Dr. Anasraj R 3 PG Scholar, Deartment of Electrical
More informationDesign and Implementation of Type-II Compensator in DC-DC Switch-Mode Step-up Power Supply
Design and Imlementation of Tye-II Comensator in DC-DC Switch-Mode Ste-u Power Suly Arnab Ghosh, Student Member, IEEE, and Subrata Banerjee, Member, IEEE Deartment of Electrical Engineering, National Institute
More informationABSTRACT. AYHAN, BULENT. Linguistic Rule Generation for Broken Rotor Bar Detection in Squirrelcage
ABSTRACT AYHAN, BULENT. Linguistic Rule Generation for Broken Rotor Bar Detection in Squirrelcage Induction Motors. (Under the direction of Dr. Mo-Yuen Chow.) In motor condition monitoring applications,
More informationDynamic Range Enhancement Algorithms for CMOS Sensors With Non-Destructive Readout
IEEE International Worksho on Imaging Systems and Techniques IST 2008 Chania, Greece, Setember 10 12, 2008 Dynamic Range Enhancement Algorithms for CMOS Sensors With Non-Destructive Readout Anton Kachatkou,
More informationA novel High Bandwidth Pulse-Width Modulated Inverter
Proceedings of the 10th WSEAS International onference on IRUITS, Vouliagmeni, Athens, Greece, July 101, 006 (8085) A novel High Bandwidth PulseWidth Modulated Inverter J. HATZAKIS, M. VOGIATZAKI, H. RIGAKIS,
More informationAnalysis of Pseudorange-Based DGPS after Multipath Mitigation
International Journal of Scientific and Research Publications, Volume 7, Issue 11, November 2017 77 Analysis of Pseudorange-Based DGPS after Multiath Mitigation ThilanthaDammalage Deartment of Remote Sensing
More informationAnalysis Of Induction Motor With Broken Rotor Bars Using Discrete Wavelet Transform Princy P 1 and Gayathri Vijayachandran 2
Analysis Of Induction Motor With Broken Rotor Bars Using Discrete Wavelet Transform Princy P 1 and Gayathri Vijayachandran 2 1 Dept. Of Electrical and Electronics, Sree Buddha College of Engineering 2
More informationQuantum Limited DPSK Receivers with Optical Mach-Zehnder Interferometer Demodulation
Quantum Limited DPSK Receivers with Otical Mach-Zehnder Interferometer Demodulation Xiuu Zhang, Deartment of Electrical and Comuter Engineering, Concordia University, Montreal, Quebec, CANADA, E-mail:
More informationSoftware for Modeling Estimated Respiratory Waveform
Software for Modeling Estimated Resiratory Waveform Aleksei E. Zhdanov, Leonid G. Dorosinsky Abstract In the imaging of chest or abdomen, motion artifact is an unavoidable roblem. In the radiation treatment,
More informationKeywords: Cyclic Prefix, Guard Interval, OFDM, PAPR
Volume 3, Issue 6, June 013 ISS: 77 18X International Journal of Advanced Research in Comuter Science and Software Engineering Research Paer Available online at: www.ijarcsse.com Performance Analysis of
More informationHigh-Frequency Isolated DC/DC Converter for Input Voltage Conditioning of a Linear Power Amplifier
High-Frequency solated DC/DC Converter for nut oltage Conditioning of a inear ower Amlifier Guanghai Gong, Hans Ertl and Johann W. Kolar Swiss Federal nstitute of Technology (ETH) urich ower Electronic
More informationPerformance Analysis of MIMO System using Space Division Multiplexing Algorithms
Performance Analysis of MIMO System using Sace Division Multilexing Algorithms Dr.C.Poongodi 1, Dr D Deea, M. Renuga Devi 3 and N Sasireka 3 1, Professor, Deartment of ECE 3 Assistant Professor, Deartment
More informationTransmitter Antenna Diversity and Adaptive Signaling Using Long Range Prediction for Fast Fading DS/CDMA Mobile Radio Channels 1
Transmitter Antenna Diversity and Adative Signaling Using ong Range Prediction for Fast Fading DS/CDMA Mobile Radio Channels 1 Shengquan Hu, Tugay Eyceoz, Alexandra Duel-Hallen North Carolina State University
More informationEvolutionary Circuit Design: Information Theory Perspective on Signal Propagation
Evolutionary Circuit Design: Theory Persective on Signal Proagation Denis Poel Deartment of Comuter Science, Baker University, P.O. 65, Baldwin City, KS 66006, E-mail: oel@ieee.org Nawar Hakeem Deartment
More informationProperties of Mobile Tactical Radio Networks on VHF Bands
Proerties of Mobile Tactical Radio Networks on VHF Bands Li Li, Phil Vigneron Communications Research Centre Canada Ottawa, Canada li.li@crc.gc.ca / hil.vigneron@crc.gc.ca ABSTRACT This work extends a
More informationCity, University of London Institutional Repository
City Research Online City, University of London Institutional Reository Citation: Liu, T., Fothergill, J., Dodd, S. J. & Nilsson, U. H. (9). Influence of semicon shields on the dielectric loss of XLPE
More informationSPACE-FREQUENCY CODED OFDM FOR UNDERWATER ACOUSTIC COMMUNICATIONS
SPACE-FREQUENCY CODED OFDM FOR UNDERWATER ACOUSTIC COMMUNICATIONS E. V. Zorita and M. Stojanovic MITSG 12-35 Sea Grant College Program Massachusetts Institute of Technology Cambridge, Massachusetts 02139
More informationThree-Phase Series-Buck Rectifier with Split DC- Bus Based on the Scott Transformer
Three-Phase Series-Buck Rectifier with Slit DC- Bus Based on the Scott Transformer Alceu André Badin and Io Barbi Federal Uniersity of Santa Catarina/Deartment of Electrical Engineering/Power Electronics
More informationLAB IX. LOW FREQUENCY CHARACTERISTICS OF JFETS
LAB X. LOW FREQUENCY CHARACTERSTCS OF JFETS 1. OBJECTVE n this lab, you will study the -V characteristics and small-signal model of Junction Field Effect Transistors (JFET).. OVERVEW n this lab, we will
More informationSeries PID Pitch Controller of Large Wind Turbines Generator
SERBIAN JOURNAL OF ELECRICAL ENGINEERING Vol. 1, No., June 015, 183-196 UDC: 61.311.4:681.5 DOI: 10.98/SJEE150183M Series PID Pitch Controller of Large Wind urbines Generator Aleksandar D. Micić 1, Miroslav
More informationHydro-turbine governor control: theory, techniques and limitations
University of Wollongong Research Online Faculty of Engineering and Information Sciences - Paers: Part A Faculty of Engineering and Information Sciences 006 Hydro-turbine governor control: theory, techniques
More informationTechnical and Economic Feasibility of Passive Shielding Used to Mitigate Power Lines Magnetic Fields
Technical and Economic Feasibility of Passive Shielding Used to Mitigate Power Lines Magnetic Fields AHMED R. SAYED, HUSSEIN I. ANIS Electrical Power and Machine Deartment Cairo University Giza EGYPT eng_ahmed.rabee@eng.cu.edu.eg,
More informationBroken Rotor Bar Fault Detection using Wavlet
Broken Rotor Bar Fault Detection using Wavlet sonalika mohanty Department of Electronics and Communication Engineering KISD, Bhubaneswar, Odisha, India Prof.(Dr.) Subrat Kumar Mohanty, Principal CEB Department
More informationPrediction Efficiency in Predictive p-csma/cd
Prediction Efficiency in Predictive -CSMA/CD Mare Miśowicz AGH University of Science and Technology, Deartment of Electronics al. Miciewicza 30, 30-059 Kraów, Poland misow@agh.edu.l Abstract. Predictive
More informationFault Detection in Three Phase Induction Motor
Fault Detection in Three Phase Induction Motor A.Selvanayakam 1, W.Rajan Babu 2, S.K.Rajarathna 3 Final year PG student, Department of Electrical and Electronics Engineering, Sri Eshwar College of Engineering,
More informationLabVIEW Based Condition Monitoring Of Induction Motor
RESEARCH ARTICLE OPEN ACCESS LabVIEW Based Condition Monitoring Of Induction Motor 1PG student Rushikesh V. Deshmukh Prof. 2Asst. professor Anjali U. Jawadekar Department of Electrical Engineering SSGMCE,
More informationAn Efficient VLSI Architecture Parallel Prefix Counting With Domino Logic Λ
An Efficient VLSI Architecture Parallel Prefix Counting With Domino Logic Λ Rong Lin y Koji Nakano z Stehan Olariu x Albert Y. Zomaya Abstract We roose an efficient reconfigurable arallel refix counting
More informationThere are two basic types of FET s: The junction field effect transistor or JFET the metal oxide FET or MOSFET.
Page 61 Field Effect Transistors The Fieldeffect transistor (FET) We know that the biolar junction transistor or BJT is a current controlled device. The FET or field effect transistor is a voltage controlled
More informationTHE HELMHOLTZ RESONATOR TREE
THE HELMHOLTZ RESONATOR TREE Rafael C. D. Paiva and Vesa Välimäki Deartment of Signal Processing and Acoustics Aalto University, School of Electrical Engineering Esoo, Finland rafael.dias.de.aiva@aalto.fi
More informationState-of-the-Art Verification of the Hard Driven GTO Inverter Development for a 100 MVA Intertie
State-of-the-Art Verification of the Hard Driven GTO Inverter Develoment for a 100 MVA Intertie P. K. Steimer, H. Grüning, J. Werninger R&D Drives and Power Electronics ABB Industrie AG CH-5300 Turgi,
More informationFinger and Forehead PPG Signal Comparison for Respiratory Rate Estimation Based on Pulse Amplitude Variability
Finger and Forehead PPG Signal Comarison for Resiratory Rate Estimation Based on Pulse Amlitude Variability Alberto Hernando, María Dolores Peláez, María Teresa Lozano and Montserrat Aiger Centro Universitario
More informationTWO-STAGE SPEECH/MUSIC CLASSIFIER WITH DECISION SMOOTHING AND SHARPENING IN THE EVS CODEC
TWO-STAGE SPEECH/MUSIC CLASSIFIER WITH DECISION OOTHING AND SHARPENING IN THE EVS CODEC Vladimir Malenovsky *, Tommy Vaillancourt *, Wang Zhe, Kihyun Choo, Venkatraman Atti *VoiceAge Cor., Huawei Technologies,
More informationTO IMPROVE BIT ERROR RATE OF TURBO CODED OFDM TRANSMISSION OVER NOISY CHANNEL
TO IMPROVE BIT ERROR RATE OF TURBO CODED TRANSMISSION OVER NOISY CHANNEL 1 M. K. GUPTA, 2 VISHWAS SHARMA. 1 Deartment of Electronic Instrumentation and Control Engineering, Jagannath Guta Institute of
More informationPerformance of Chaos-Based Communication Systems Under the Influence of Coexisting Conventional Spread-Spectrum Systems
I TRANSACTIONS ON CIRCUITS AND SYTMS I: FUNDAMNTAL THORY AND APPLICATIONS, VOL. 50, NO., NOVMBR 2003 475 Performance of Chaos-Based Communication Systems Under the Influence of Coexisting Conventional
More informationPhotonic simultaneous frequency identification of radio-frequency signals with multiple tones
Photonic simultaneous frequency identification of radio-frequency signals with multile tones Hossein Emami,, * Niusha Sarkhosh, and Mohsen Ashourian Deartment of Electrical Engineering, Majlesi Branch,
More informationFEATURE EXTRACTION FOR SPEECH RECOGNITON
M.Tech. Credit Seminar Reort, Electronic Systems Grou, EE. Det, IIT Bombay, Submitted November2003 Abstract FEATURE EXTRACTION FOR SPEECH RECOGNITON Manish P. Kesarkar (Roll No: 03307003) Suervisor: Prof.
More informationSmall-Signal Analysis of DCM Flyback Converter in Frequency-Foldback Mode of Operation
Small-Signal Analysis of DCM Flyback Converter in Frequency-Foldback Mode of eration Laszlo Huber and Milan M. Jovanović Delta Products Cororation P.. Box 73 5 Davis Drive Research Triangle Park, NC 779,
More informationOptimal p-persistent MAC algorithm for event-driven Wireless Sensor Networks
Otimal -ersistent MAC algorithm for event-driven Wireless Sensor Networks J. Vales-Alonso,E.Egea-Lóez, M. V. Bueno-Delgado, J. L. Sieiro-Lomba, J. García-Haro Deartment of Information Technologies and
More informationREAL TIME PERFORMANCE ANALYSIS, FAULT DETECTION AND CONTROL IN CONICAL TANK SYSTEM
REAL TIME PERFORMANCE ANALYSIS, FAULT DETECTION AND CONTROL IN CONICAL TANK SYSTEM S.Pooja Dr.S.Vijayachitra 2 (Electronics and Instrumentation Engineering, Anna University, Erode, India, oojainst27@gmail.com)
More informationThe pulse compression waveform that we have already considered is the LFM t is a quadratic phase function.
5.0 PULSE COMPRESSION WAVEFORMS There is a class of waveforms termed ulse comression waveforms. These tyes of waveforms, and their associated signal rocessors, are useful because the overall signal duration
More informationIEEE P Wireless Personal Area Networks. UWB Channel Model for under 1 GHz
Setember, 4 IEEE P85-4/55r Project Title Date Submitted Source Re: Abstract Purose Notice Release IEEE P85 Wireless Personal Area Networks IEEE P85 Working Grou for Wireless Personal Area Networks (WPANs)
More informationAn Overview of PAPR Reduction Optimization Algorithm for MC-CDMA System
RESEARCH ARTICLE OPEN ACCESS An Overview of PAPR Reduction Otimization Algorithm for MC-CDMA System Kanchan Singla*, Rajbir Kaur**, Gagandee Kaur*** *(Deartment of Electronics and Communication, Punjabi
More informationU-series IGBT Modules (1,200 V)
U-series IGBT Modules (1, V) Yuichi Onozawa Shinichi Yoshiwatari Masahito Otsuki 1. Introduction Power conversion equiment such as general-use inverters and uninterrutible ower sulies (UPSs) is continuously
More informationPhysics. Valve Electronics.
Physics Valve Electronics www.testrekart.com Table of Content 1. Do You Know?. Thermionic Emission and Emitters. 3. Vacuum Tubes and Thermionic Valves. 4. Diode Valve. 5. Triode Valve. 1 1. Do You Know?
More informationAnalysis of Mean Access Delay in Variable-Window CSMA
Sensors 007, 7, 3535-3559 sensors ISSN 44-80 007 by MDPI www.mdi.org/sensors Full Research Paer Analysis of Mean Access Delay in Variable-Window CSMA Marek Miśkowicz AGH University of Science and Technology,
More informationSpiking Neural Networks for Real-Time Infrared Images Processing in Thermo Vision Systems
Siking Neural Networks for Real-Time Infrared Images Processing in Thermo Vision Sstems Snejana Pleshkova Deartment of Telecommunications Technical Universit Kliment Ohridski, 8 Sofia aabbv@tu-sofia.bg
More informationApproximated fast estimator for the shape parameter of generalized Gaussian distribution for a small sample size
BULLETIN OF THE POLISH ACADEMY OF SCIENCES TECHNICAL SCIENCES, Vol. 63, No. 2, 2015 DOI: 10.1515/basts-2015-0046 Aroximated fast estimator for the shae arameter of generalized Gaussian distribution for
More informationANALYSIS OF ROBUST MILTIUSER DETECTION TECHNIQUE FOR COMMUNICATION SYSTEM
ANALYSIS OF ROBUST MILTIUSER DETECTION TECHNIQUE FOR COMMUNICATION SYSTEM Kaushal Patel 1 1 M.E Student, ECE Deartment, A D Patel Institute of Technology, V. V. Nagar, Gujarat, India ABSTRACT Today, in
More informationFigure 1 7-chip Barker Coded Waveform
3.0 WAVEFOM CODING 3.1 Introduction We now want to loo at waveform coding. We secifically want to loo at hase and frequency coding. Our first exosure to waveform coding was our study of LFM ulses. In that
More informationDIAGNOSIS OF STATOR FAULT IN ASYNCHRONOUS MACHINE USING SOFT COMPUTING METHODS
DIAGNOSIS OF STATOR FAULT IN ASYNCHRONOUS MACHINE USING SOFT COMPUTING METHODS K. Vinoth Kumar 1, S. Suresh Kumar 2, A. Immanuel Selvakumar 1 and Vicky Jose 1 1 Department of EEE, School of Electrical
More informationParameter Controlled by Contrast Enhancement Using Color Image
Parameter Controlled by Contrast Enhancement Using Color Image Raguathi.S and Santhi.K Abstract -The arameter-controlled virtual histogram distribution (PCVHD) method is roosed in this roject to enhance
More informationNonlinear MSM Photodetector Model for High Resolution Laser Impulse Radar Imaging
Nonlinear MSM Photodetector Model for High Resolution Laser Imulse Radar Imaging M. DJEBARI *, M. BENSEBTI *, A. ANOU *, M. MEHDI * AND G. KOMPA ** * Deartment of electronic University Saad Dahlab of Blida
More informationInitial Ranging for WiMAX (802.16e) OFDMA
Initial Ranging for WiMAX (80.16e) OFDMA Hisham A. Mahmoud, Huseyin Arslan Mehmet Kemal Ozdemir Electrical Engineering Det., Univ. of South Florida Logus Broadband Wireless Solutions 40 E. Fowler Ave.,
More informationLaboratory Essay with Online Back-calculation Anti-windup Scheme for a MTG System
PID' Brescia (Italy), March 8-, WeB. Laboratory Essay with Online Back-calculation Anti-windu Scheme for a MTG System Antônio M. S. Neto, Thaise P. Damo, Antonio A. R. Coelho Federal University of Santa
More informationInfluence of Earth Conductivity and Permittivity Frequency Dependence in Electromagnetic Transient Phenomena
Influence of Earth Conductivity and Permittivity Frequency Deendence in Electromagnetic Transient Phenomena C. M. Portela M. C. Tavares J. Pissolato ortelac@ism.com.br cristina@sel.eesc.sc.us.br isso@dt.fee.unicam.br
More informationA new approach to bit error rate reduction and its impact on telecom performance
Journal of Scientific AHUJA & Industrial & CHAKKA: ResearchA NEW APPROACH TO BIT ERROR RATE REDUCTION ON TELECOM Vol. 72, March 23,. 49-59 49 A new aroach to bit error rate reduction and its imact on telecom
More informationCircular Dynamic Stereo and Its Image Processing
Circular Dynamic Stereo and Its Image Processing Kikuhito KAWASUE *1 and Yuichiro Oya *2 *1 Deartment of Mechanical Systems Engineering Miyazaki University 1-1, Gakuen Kibanadai Nishi, Miyazaki 889-2192
More informationDetection of Potential Induced Degradation in c-si PV Panels Using Electrical Impedance Spectroscopy
Detection of Potential Induced Degradation in c-si PV Panels Using Electrical Imedance Sectroscoy Matei I. Orea 1, Sergiu V. Sataru 1, Dezso Sera 1, Peter B. Poulsen 2, Sune Thorsteinsson 2, Ronni Basu
More informationUsable speech detection using a context dependent Gaussian mixture model classifier
From the SelectedWorks of Ananth N Iyer May, 2004 Usable seech detection using a context deendent Gaussian mixture model classifier Robert E Yantorno, Temle University Brett Y Smolenski Ananth N Iyer Jashmin
More informationRClamp2574N. High Power TVS for Ethernet Interfaces. PROTECTION PRODUCTS - RailClamp Description. Features. Mechanical Characteristics.
- RailClam Descrition RailClam TS diodes are secifically designed to rotect sensitive comonents which are connected to high-seed data and transmission lines from overvoltage caused by ESD (electrostatic
More informationAC Winding Analysis using Winding Function Approach
AC Winding Analysis using Winding Function Aroach Gojko Joksimović Deartment of Electrical Engineering University of Montenegro, 0000 Podgorica Montenegro joxo@ac.me Abstract One of the crucial arts of
More informationDetection of Broken Bars in Induction Motors Using a Neural Network
Detection of Broken Bars in Induction Motors Using a Neural Network 245 JPE 6-3-7 Detection of Broken Bars in Induction Motors Using a Neural Network M. Moradian *, M. Ebrahimi **, M. Danesh ** and M.
More informationTime- Frequency Techniques for Fault Identification of Induction Motor
International Journal of Electronic Networks Devices and Fields. ISSN 0974-2182 Volume 8 Number 1 (2016) pp. 13-17 International Research Publication House http://www.irphouse.com Time- Frequency Techniques
More informationThe online muon identification with the ATLAS experiment at the LHC
32 he online muon identification with the ALAS exeriment at the LHC Abstract he Large Hadron Collider (LHC) at CERN is a roton-roton collider roviding the highest energy and the highest instantaneous luminosity
More information