# the pilot valve effect of

Save this PDF as:
Size: px
Start display at page:

## Transcription

1 Actiive Feedback Control and Shunt Damping Example 3.2: A servomechanism incorporating a hydraulic relay with displacement feedback throughh a dashpot and spring assembly is shown below. [Control System by Beard, 1984] Fig. 3.7 Servomechanism with a hydraulic relay The velocity of the output ram (Dx,) is equal to K times the movement of the pilot valve from its neutral position. Given that the inertia of all parts and the effect of friction (other than at the dashpot c) may be neglected, determine the equation of motion of the system. For the control rod,

2 where v is the spring displacement and y is the movement of the spool valve. Thus; (3.19) Force balance for the spring and dashpot gives (3.20) So that (3.21) The flow equation gives Dx o = Ky. Substituting for y and v gives (3.22) (3.23) This can be rearranged to give the equation of motion as; (3.24) Problem 3.3: A linear remote position control system with negative output feedback consists of a potentiometer giving 8 V/rad errors to an amplifier, and a motor which applies a torque of 3 N m/v to the load. The load has inertia of 6 kg m2 and viscous friction of 12 N m s/rad. (i) Draw a block diagram for the system and derive its equation of motion. (ii) Calculate the maximum overshoot in the output response to a step input of 2 rad, and

3 (iii) Given that a tacho-generator is employed to provide negative outpu velocity feedback, derivee the new equation of motion and calculate the velocity feedback coefficient needed to give critical damping. Sol: (i) The block diagram for the system is Fig. 3.8 Block Diagram Equation is (3.25) So the final equation of motion is (3.26) where K = 8 V/rad errorr G = 3 Nm/V, J = 6 kg m 2, and c = 12 N m s/rad, ii) With a step input, overshoot is (3.27)

4 and overshoot = 2 x rad = rad, for a 2 rad input (iii) With output velocity feedback, the block diagram is Fig. 3.9 Block diagram So that (3.28) and the equation of motion is (3.29) For critical damping that is Hence, Ans.

5 Vibration Damping: Damping is a phenomenonn by whichh mechanical energy is dissipatedd (usually converted as thermal energy) in dynamic systems. Threee primary mechanisms involved in damping Internal damping of material Structural damping at joints and interface Fluid damping through fluid -structure interactions Two types of external dampers can be added to a mechanical system to improve its energy dissipation characteristics: Active dampers require external source of power Passive dampers Does not require MATERIAL (Internal) Damping Types of Internal damping: Fig Displacement time response of damped system Internal damping originates from energy dissipation associated with: --microstructure defects (grain boundaries & impurities), -thermo elastic effects (caused by local temperature gradients) -eddy-current effects (ferromagnetic materials), -dislocation motion in metals, etc -Viscoelastic damping -Hysteretic damping

6 Shunt Damping: Structural damping is an important means of reducing vibration, noise and fatigue. Vibration can be suppressed by adding mass to a system, introducing a mechanical vibration absorber or a variety of other techniques. This paper explores the use of smart materials or piezoelectric polymers in conjunction with an electrical shunt circuit as a single mode damper. Piezoelectric shunt damping is a popular technique for vibration suppression in smart structures. These are characterized by the connection of electrical impedance to a structurally bonded piezoelectric transducer. Such methods do not require an external sensor, may guarantee stability of the shunted system and do not require parametric models for design purposes. The piezoelectric materials are used in conjunction with passive inductance-resistancecapacitance (RLC) circuits to dampen specific vibration modes. The piezoelectric materials convert mechanical energy to electrical energy, which is then dissipated in the RLC circuit through joule heating. Resonant shunt damping circuits, comprised of inductors, capacitors, and resistors, are simple to design and can significantly augment the damping of lightly-damped flexible structures. Piezoelectric materials have the unique ability to convert mechanical energy into electrical energy and vice versa. When strained the piezoelectric materials produce a voltage difference across the poled terminals. This characteristic has been exploited in various configurations of mechanical sensors. Inversely, piezoelectric materials strain when a voltage is applied. This characteristic enables piezoelectric materials to be used as mechanical actuators. Active control systems require complex amplifiers and electronic sensors. Implementation of simple and robust passive control systems using piezoelectric materials decreases the risk of malfunction and deterioration. A passive control system is used to damp a single mode of a simple cantilever beam (1-DOF). Analysis was done to predict the optimal position of a piezoelectric tile on the beam. A resonant shunt circuit was created using an inductor and resistor in series and parallel. The electrical impedance frequency was tuned to equate the modal frequency that was to be damped. The efficiency of these shunts depends very much on the ability to (i) transfer strain from the vibrating structure to the transducer material, and (ii) transform the strain energy into electrical energy inside the active material. The latter is measured by the piezoelectric electromechanical coupling factor k.

7 Application of shunt damping for a cantilever beam: An analytical model has been developed to determine point displacements, mode shapes and strain energy of a cantilever beam. A beam clamped at one end and free at the other was used. Fig Cantilever beam with PZT patch The Euler-Bernoulli method is used to model the cantilever beam. The governing undamped equation of motion for the beam for forced motion under zero initial conditions can be written as: (3.30) where w is the displacement of the beam, ρ is the density of the steel beam, A is the cross-sectional area, and F(t) is the external force applied to the beam. The boundary conditions are: Considering a harmonic forcing function applied according to Fig. 1, we can write: to a single point on the beam,

8 (3.31) where ω is the frequency, L f is the position of the applied force and c 2 can be written as: (3.32) A piezoelectric material is a three-dimensional device poled along one axis. Most piezoelectric patches (PZT) are poled across the thickness with electrodes through the top and bottom planes. As a voltage difference is applied across the electrodes (x3 direction in Figure 2), a strain is produced in the other two directions (x 1 and x 2 ). Fig PZT patch design on cantilever beam For the given experiment, axis 1 is bonded along the horizontal neutral axis of the cantilever beam as shown in Figure 1. When deformed by the cantilever bending, the PZT produces a voltage across axis 3. The material transverse coupling constant (kij) is used to describe the relationship of energy transfer from the i-axis to the j-axis and is specific to the PZT patch design. A simplified description of the PZT damper is to convert mechanical energy into electrical energy and then dissipate the electrical energy in the form of joule heating through a resistor. The equation for power dissipated by the resistor is; (3.33)

9 Maximizing the current through the resistor increases electrical damping. A simple resistor shunt circuit can be used as a broadband damper. The resistor will effectively dissipate energy from all modes of vibration. Parallel RL Circuit An inductor-resistor shunt circuit was implemented to create an electricall resonant frequency for single mode damping. Placing the inductor and resistor in parallel to the PZT allows for the simplest electrical frequency tuning because the inductor and resistor can be altered independently. Optimum resistor and inductor values for a parallel configuration were calculated using the method outlined by Wu and Bicos (1997) as; 1. Experimentally determinee ωo and ωss for the cantilever beam. ωo and ωs are the PZT open-circuit and short-circuit modal frequencies for the cantilever beam. 2. Calculate the generalized electromechanical coupling coefficient for mode 31. (3.34) 3. Determine the PZT capacitance at capacitance. constant strain. CT is the pre-bonded PZT (3.35) 4. Calculate the normalized tuning frequency (3.36) 5. The optimum parallel inductance is (3.37) 6. The optimum parallel shunt resistance is (3.38)

10 Fig RLC circuit for piezo-electric material Series RL Circuit By Kirchoff s law, current is constant through elements in series. Therefore, a resistor and inductor in series with the PZT can achievee maximum m current through the resistor. The optimum resistor and inductor values for the series circuit were calculated following the procedures of Hagood and Von Flotow (1991). The dissipation tuning parameter was calculated by (3.39) The optimal circuit damping was determined by (3.40) The optimal series shunt resistance is (3.41) The electrical resonance frequency is (3.42)

11 The optimal series configuration inductance value can be calculate by setting the electrical frequency equal to the short-circuit frequency (ωe = ωo). (3.43)

### Chapter 30: Principles of Active Vibration Control: Piezoelectric Accelerometers

Chapter 30: Principles of Active Vibration Control: Piezoelectric Accelerometers Introduction: Active vibration control is defined as a technique in which the vibration of a structure is reduced or controlled

### Vibration Fundamentals Training System

Vibration Fundamentals Training System Hands-On Turnkey System for Teaching Vibration Fundamentals An Ideal Tool for Optimizing Your Vibration Class Curriculum The Vibration Fundamentals Training System

### Module 2 WAVE PROPAGATION (Lectures 7 to 9)

Module 2 WAVE PROPAGATION (Lectures 7 to 9) Lecture 9 Topics 2.4 WAVES IN A LAYERED BODY 2.4.1 One-dimensional case: material boundary in an infinite rod 2.4.2 Three dimensional case: inclined waves 2.5

### São Paulo, São Carlos-SP, Brazil Métiers, Paris, France

Blucher Mechanical Engineering Proceedings May 2014, vol. 1, num. 1 www.proceedings.blucher.com.br/evento/10wccm TOPOLOGICAL OPTIMIZATION OF PIEZOELECTRIC ENERGY HARVESTING DEVICES FOR IMPROVED ELECTROMECHANICAL

page 1 of 17 Experimental Competition May 7, 2015 08:30-13:30 hours Answer Sheets Cover Page STUDENT CODE Additional number of writing sheets= Do not write below this line Part A Part B Part C Part D Part

### Active Vibration Control in Ultrasonic Wire Bonding Improving Bondability on Demanding Surfaces

Active Vibration Control in Ultrasonic Wire Bonding Improving Bondability on Demanding Surfaces By Dr.-Ing. Michael Brökelmann, Hesse GmbH Ultrasonic wire bonding is an established technology for connecting

CONTENTS Preface page xiii 1 Equivalent Single-Degree-of-Freedom System and Free Vibration... 1 1.1 Degrees of Freedom 3 1.2 Elements of a Vibratory System 5 1.2.1 Mass and/or Mass-Moment of Inertia 5

### VIBRATION SUPPRESSION OF ROTATING BEAMS THROUGH PIEZOELECTRIC SHUNT CIRCUITS PRESTON POWELL

VIBRATION SUPPRESSION OF ROTATING BEAMS THROUGH PIEZOELECTRIC SHUNT CIRCUITS by PRESTON POWELL JINWEI SHEN, COMMITTEE CHAIR WEIHUA SU STEVE SHEPARD HAO KANG A THESIS Submitted in partial fulfillment of

### EXPERIMENTAL ANALYSIS OF BOLT LOOSENING DYNAMICS CHARACTERISTIC IN A BEAM BY IMPACT TESTING

EXPERIMENTAL ANALYSIS OF BOLT LOOSENING DYNAMICS CHARACTERISTIC IN A BEAM BY IMPACT TESTING Meifal Rusli, Candra Mardianto and Mulyadi Bur Department of Mechanical Engineering, Faculty of Engineering,

### Chapter 13 Tuned-Mass Dampers. CIE Structural Control 1

Chapter 13 Tuned-Mass Dampers 1 CONTENT 1. Introduction 2. Theory of Undamped Tuned-mass Dampers Under Harmonic Loading 3. Theory of Undamped Tuned-mass Dampers Under Harmonic Base Motion 4. Theory of

AN ADAPTIVE VIBRATION ABSORBER Simon Hill, Scott Snyder and Ben Cazzolato Department of Mechanical Engineering, The University of Adelaide Australia, S.A. 5005. Email: simon.hill@adelaide.edu.au 1 INTRODUCTION

### Modeling and Control of Mold Oscillation

ANNUAL REPORT UIUC, August 8, Modeling and Control of Mold Oscillation Vivek Natarajan (Ph.D. Student), Joseph Bentsman Department of Mechanical Science and Engineering University of Illinois at UrbanaChampaign

### Module 1: Overview of Vibration Control. Lecture 3: Active Vibration Control. The Lecture Contains: Different strategies for vibration control

Lecture 3: Active Vibration Control The Lecture Contains: Different strategies for vibration control Comparison of feed forward and feedback control Implementation of controller Smart structural control

### Characteristics of Crystal. Piezoelectric effect of Quartz Crystal

Characteristics of Crystal Piezoelectric effect of Quartz Crystal The quartz crystal has a character when the pressure is applied to the direction of the crystal axis, the electric change generates on

### Dynamic Vibration Absorber

Part 1B Experimental Engineering Integrated Coursework Location: DPO Experiment A1 (Short) Dynamic Vibration Absorber Please bring your mechanics data book and your results from first year experiment 7

### Conventional geophone topologies and their intrinsic physical limitations, determined

Magnetic innovation in velocity sensing Low -frequency with passive Conventional geophone topologies and their intrinsic physical limitations, determined by the mechanical construction, limit their velocity

### 5. Transducers Definition and General Concept of Transducer Classification of Transducers

5.1. Definition and General Concept of Definition The transducer is a device which converts one form of energy into another form. Examples: Mechanical transducer and Electrical transducer Electrical A

### 1241. Efficiency improvement of energy harvester at higher frequencies

24. Efficiency improvement of energy harvester at higher frequencies Giedrius Janusas, Ieva Milasauskaite 2, Vytautas Ostasevicius 3, Rolanas Dauksevicius 4 Kaunas University of Technology, Kaunas, Lithuania

### Introduction to Measurement Systems

MFE 3004 Mechatronics I Measurement Systems Dr Conrad Pace Page 4.1 Introduction to Measurement Systems Role of Measurement Systems Detection receive an external stimulus (ex. Displacement) Selection measurement

### The units of vibration depend on the vibrational parameter, as follows:

Vibration Measurement Vibration Definition Basically, vibration is oscillating motion of a particle or body about a fixed reference point. Such motion may be simple harmonic (sinusoidal) or complex (non-sinusoidal).

### Energy efficient active vibration control strategies using electromagnetic linear actuators

Journal of Physics: Conference Series PAPER OPEN ACCESS Energy efficient active vibration control strategies using electromagnetic linear actuators To cite this article: Angel Torres-Perez et al 2018 J.

### Wojciech BATKO, Michał KOZUPA

ARCHIVES OF ACOUSTICS 33, 4 (Supplement), 195 200 (2008) ACTIVE VIBRATION CONTROL OF RECTANGULAR PLATE WITH PIEZOCERAMIC ELEMENTS Wojciech BATKO, Michał KOZUPA AGH University of Science and Technology

### SRI VENKATESWARA COLLEGE OF ENGINEERING AND TECHNOLOGY

SRI VENKATESWARA COLLEGE OF ENGINEERING AND TECHNOLOGY DEPARTMENT OF ELECTRICAL AND ELECTRONICS ENGINEERING IC 6501 CONTROL SYSTEMS UNIT I - SYSTEMS AND THEIR REPRESETNTATION` TWO MARKS QUESTIONS WITH

### DC SERVO MOTOR CONTROL SYSTEM

DC SERVO MOTOR CONTROL SYSTEM MODEL NO:(PEC - 00CE) User Manual Version 2.0 Technical Clarification /Suggestion : / Technical Support Division, Vi Microsystems Pvt. Ltd., Plot No :75,Electronics Estate,

### Research Paper Comparison of Energy Harvesting using Single and Double Patch PVDF with Hydraulic Dynamism

INTERNATIONAL JOURNAL OF R&D IN ENGINEERING, SCIENCE AND MANAGEMENT Vol., Issue 1, May 16, p.p.56-67, ISSN 393-865X Research Paper Comparison of Energy Harvesting using Single and Double Patch PVDF with

### Part 2: Second order systems: cantilever response

- cantilever response slide 1 Part 2: Second order systems: cantilever response Goals: Understand the behavior and how to characterize second order measurement systems Learn how to operate: function generator,

### ELECTRICAL PROPERTIES AND POWER CONSIDERATIONS OF A PIEZOELECTRIC ACTUATOR

ELECTRICAL PROPERTIES AND POWER CONSIDERATIONS OF A PIEZOELECTRIC ACTUATOR T. Jordan*, Z. Ounaies**, J. Tripp*, and P. Tcheng* * NASA-Langley Research Center, Hampton, VA 23681, USA ** ICASE, NASA-Langley

### Hybrid Vibration Energy Harvester Based On Piezoelectric and Electromagnetic Transduction Mechanism

Hybrid Vibration Energy Harvester Based On Piezoelectric and Electromagnetic Transduction Mechanism Mohd Fauzi. Ab Rahman 1, Swee Leong. Kok 2, Noraini. Mat Ali 3, Rostam Affendi. Hamzah 4, Khairul Azha.

### Sensors (Transducer) Introduction By Sintayehu Challa

Sensors (Transducer) Introduction What are Sensors? Basically the quantities to be measured are Non-Electrical quantities such as temperature, pressure,displacement,humidity, fluid flow, speed etc, but

### Multi-resonant Electromagnetic Shunt in Base Isolation for Vibration Damping and Energy Harvesting

Multi-resonant Electromagnetic Shunt in Base Isolation for Vibration Damping and Energy Harvesting Yalu Pei Thesis submitted to the faculty of Virginia Polytechnic Institute and State University in partial

### Evaluation of Magnetostrictive Shunt Damper Performance Using Iron (Fe)-Gallium (Ga) Alloy

Evaluation of Magnetostrictive Shunt Damper Performance Using Iron (Fe)-Gallium (Ga) Alloy by Andrew James Murray and Dr. JinHyeong Yoo ARL-TN-0566 September 2013 Approved for public release; distribution

### Communication Circuit Lab Manual

German Jordanian University School of Electrical Engineering and IT Department of Electrical and Communication Engineering Communication Circuit Lab Manual Experiment 3 Crystal Oscillator Eng. Anas Alashqar

### ACTIVE VIBRATION CONTROL OF HARD-DISK DRIVES USING PZT ACTUATED SUSPENSION SYSTEMS. Meng-Shiun Tsai, Wei-Hsiung Yuan and Jia-Ming Chang

ICSV14 Cairns Australia 9-12 July, 27 ACTIVE VIBRATION CONTROL OF HARD-DISK DRIVES USING PZT ACTUATED SUSPENSION SYSTEMS Abstract Meng-Shiun Tsai, Wei-Hsiung Yuan and Jia-Ming Chang Department of Mechanical

### University of Twente

University of Twente Faculty of Electrical Engineering, Mathematics & Computer Science Switched Mode Piezo-Panel Driver Robert Jan Slakhorst MSc. Thesis March 2007 Supervisors: prof. dr. ir. B. Nauta dr.

### An Autonomous Piezoelectric Shunt Damping System

An Autonomous Piezoelectric Shunt Damping System Andrew J. Fleming, Sam Behrens, and S. O. Reza Moheimani School of Electrical Engineering and Computer Science, The University of Newcastle, Callaghan 2308,

### Special Lecture Series Biosensors and Instrumentation

!1 Special Lecture Series Biosensors and Instrumentation Lecture 6: Micromechanical Sensors 1 This is the first part of the material on micromechanical sensors which deals with piezoresistive and piezoelectric

### ELASTIC STRUCTURES WITH TUNED LIQUID COLUMN DAMPERS

ELATIC TRUCTURE WITH TUNED LIQUID COLUMN DAMPER C. Adam, A. Hruska and M. Kofler Department of Civil Engineering Vienna University of Technology, A-1040 Vienna, Austria Abstract: The influence of Tuned

### Electronics and Instrumentation Name ENGR-4220 Fall 1999 Section Modeling the Cantilever Beam Supplemental Info for Project 1.

Name ENGR-40 Fall 1999 Section Modeling the Cantilever Beam Supplemental Info for Project 1 The cantilever beam has a simple equation of motion. If we assume that the mass is located at the end of the

### Veröffentlichungen am IKFF PIEZOELECTRIC TRAVELLING WAVE MOTORS GENERATING DIRECT LINEAR MOTION

Veröffentlichungen am IKFF PIEZOELECTRIC TRAVELLING WAVE MOTORS GENERATING DIRECT LINEAR MOTION M. Hermann, W. Schinköthe (IKFF) Beitrag zur Actuator 96 Bremen 26. - 28.06.96 Conference Proceedings, S.

### CHAPTER 9 BRIDGES, STRAIN GAGES AND SOME VARIABLE IMPEDANCE TRANSDUCERS

CHPTE 9 BIDGES, STIN GGES ND SOME IBLE IMPEDNCE TNSDUCES Many transducers translate a change in the quantity you wish to measure into a change in impedance, i.e., resistance, capacitance or inductance.

### Figure 2.1 a. Block diagram representation of a system; b. block diagram representation of an interconnection of subsystems

1 Figure 2.1 a. Block diagram representation of a system; b. block diagram representation of an interconnection of subsystems 2 Table 2.1 Laplace transform table 3 Table 2.2 Laplace transform theorems

### A Hybrid Piezoelectric and Electrostatic Vibration Energy Harvester

A Hybrid Piezoelectric and Electrostatic Vibration Energy Harvester H. Madinei, H. Haddad Khodaparast, S. Adhikari, M. I. Friswell College of Engineering, Swansea University, Bay Campus, Fabian Way, Crymlyn

### On the axes of Fig. 4.1, sketch the variation with displacement x of the acceleration a of a particle undergoing simple harmonic motion.

1 (a) (i) Define simple harmonic motion. (b)... On the axes of Fig. 4.1, sketch the variation with displacement x of the acceleration a of a particle undergoing simple harmonic motion. Fig. 4.1 A strip

### Experimental investigation of crack in aluminum cantilever beam using vibration monitoring technique

International Journal of Computational Engineering Research Vol, 04 Issue, 4 Experimental investigation of crack in aluminum cantilever beam using vibration monitoring technique 1, Akhilesh Kumar, & 2,

### A HYBRID CONTROL SYSTEM FOR DISTRIBUTED ACTIVE VIBRATION AND SHOCK ABSORBERS

A HYBRID CONTROL SYSTEM FOR DISTRIBUTED ACTIVE VIBRATION AND SHOCK ABSORBERS Lei Chen and Colin H. Hansen School of Mechanical Engineering, Adelaide University, Adelaide, Australia Abstract The control

### HANDBOOK OF ACOUSTIC SIGNAL PROCESSING. BAW Delay Lines

HANDBOOK OF ACOUSTIC SIGNAL PROCESSING BAW Delay Lines Introduction: Andersen Bulk Acoustic Wave (BAW) delay lines offer a very simple yet reliable means of time delaying a video or RF signal with more

### Study on Vibration Isolation Design of Dual Piezoelectric Cooling Jets

From the SelectedWorks of Innovative Research Publications IRP India Summer May 1, 2015 Study on Vibration Isolation Design of Dual Piezoelectric Cooling Jets Innovative Research Publications, IRP India,

### Application Note. Piezo Amplifier. Piezoelectric Amplifier Connection. accelinstruments.com

Piezo Amplifier Piezo amplifier is ideal for driving high-capacitance and high-frequency piezoelectric devices. Piezo actuators and transducers are usually capacitive. Due to their high-capacitance, their

### Chapter 14 Oscillations. Copyright 2009 Pearson Education, Inc.

Chapter 14 Oscillations 14-7 Damped Harmonic Motion Damped harmonic motion is harmonic motion with a frictional or drag force. If the damping is small, we can treat it as an envelope that modifies the

### FLUTTER CONTROL OF WIND TUNNEL MODEL USING A SINGLE ELEMENT OF PIEZO-CERAMIC ACTUATOR

24 TH INTERNATIONAL CONGRESS OF THE AERONAUTICAL SCIENCES FLUTTER CONTROL OF WIND TUNNEL MODEL USING A SINGLE ELEMENT OF PIEZO-CERAMIC ACTUATOR Naoki Kawai Department of Mechanical Engineering, University

### Passive Damping of Rotationally Periodic Structures with Tuned Piezoelectric Inductive Shunt

Article Passive Damping of Rotationally Periodic Structures with Tuned Piezoelectric Inductive Shunt Bilal Mokrani 1, * ID, Renaud Bastaits 2, Iulian Romanescu 3, Mihaita Horodinca 3, Ioan Burda 4 and

### Application of MEMS accelerometers for modal analysis

Application of MEMS accelerometers for modal analysis Ronald Kok Cosme Furlong and Ryszard J. Pryputniewicz NEST NanoEngineering Science and Technology CHSLT Center for Holographic Studies and Laser micro-mechatronics

### Semi-Passive Vibration Control Technique via Shunting of Amplified Piezoelectric Actuators

P 41 Semi-Passive Vibration Control Technique via Shunting of Amplified Piezoelectric Actuators G. Mikułowski, Institute of Fundamental Technological Research, Warsaw, Poland M. Fournier, T. Porchez, C.

### Vibrating MEMS resonators

Vibrating MEMS resonators Vibrating resonators can be scaled down to micrometer lengths Analogy with IC-technology Reduced dimensions give mass reduction and increased spring constant increased resonance

### 1. Introduction. 2. Concept. reflector. transduce r. node. Kraftmessung an verschiedenen Fluiden in akustischen Feldern

1. Introduction The aim of this Praktikum is to familiarize with the concept and the equipment of acoustic levitation and to measure the forces exerted by an acoustic field on small spherical objects.

### Vibration Control Studies Using an Impedance Method

Proceedings of ISSS-SPIE 00 International Conference on Smart Materials Structures and Systems December 1-14, 00, Indian Institute of Science, Bangalore, India ISSS00/SA-446 Vibration Control Studies Using

### Introduction to Microeletromechanical Systems (MEMS) Lecture 12 Topics. MEMS Overview

Introduction to Microeletromechanical Systems (MEMS) Lecture 2 Topics MEMS for Wireless Communication Components for Wireless Communication Mechanical/Electrical Systems Mechanical Resonators o Quality

### Preliminary study of the vibration displacement measurement by using strain gauge

Songklanakarin J. Sci. Technol. 32 (5), 453-459, Sep. - Oct. 2010 Original Article Preliminary study of the vibration displacement measurement by using strain gauge Siripong Eamchaimongkol* Department

### Investigation on Sensor Fault Effects of Piezoelectric Transducers on Wave Propagation and Impedance Measurements

Investigation on Sensor Fault Effects of Piezoelectric Transducers on Wave Propagation and Impedance Measurements Inka Buethe *1 and Claus-Peter Fritzen 1 1 University of Siegen, Institute of Mechanics

### being developed. Most up and coming drugs are extremely expensive and limited in

Introduction In the pharmaceutical industry, it is important to know fluid properties of the drug being developed. Most up and coming drugs are extremely expensive and limited in quantity. A device that

### Fast Tip/Tilt Platform

Fast Tip/Tilt Platform Short Settling Time and High Dynamic Linearity S-331 Tip/tilt angle up to 5 mrad, optical deflection angle up to 10 mrad (0.57 ) Parallel-kinematic design for identically high performance

### Lab 9 - AC Filters and Resonance

Lab 9 AC Filters and Resonance L9-1 Name Date Partners Lab 9 - AC Filters and Resonance OBJECTIES To understand the design of capacitive and inductive filters. To understand resonance in circuits driven

### STRAIN, FORCE, PRESSURE, AND FLOW MEASUREMENTS

SECTION 4 STRAIN,, PRESSURE, AND FLOW MEASUREMENTS Walt Kester STRAIN GAGES The most popular electrical elements used in force measurements include the resistance strain gage, the semiconductor strain

### Experimental Investigation of Crack Detection in Cantilever Beam Using Natural Frequency as Basic Criterion

INSTITUTE OF TECHNOLOGY, NIRMA UNIVERSITY, AHMEDABAD 382 481, 08-10 DECEMBER, 2011 1 Experimental Investigation of Crack Detection in Cantilever Beam Using Natural Frequency as Basic Criterion A. A.V.Deokar,

### INF5490 RF MEMS. L7: RF MEMS switches, I. S2008, Oddvar Søråsen Department of Informatics, UoO

INF5490 RF MEMS L7: RF MEMS switches, I S2008, Oddvar Søråsen Department of Informatics, UoO 1 Today s lecture Switches for RF and microwave Examples Performance requirements Technology Characteristics

### Sensors. Chapter 3. Storey: Electrical & Electronic Systems Pearson Education Limited 2004 OHT 3.1

Sensors Chapter 3 Introduction Describing Sensor Performance Temperature Sensors Light Sensors Force Sensors Displacement Sensors Motion Sensors Sound Sensors Sensor Interfacing Storey: Electrical & Electronic

### Application Note # 5448

Application Note # 5448 Shunt Regulator Operation What is a shunt regulator? A shunt regulator is an electrical device used in motion control systems to regulate the voltage level of the DC bus supply

### TUNED AMPLIFIERS 5.1 Introduction: Coil Losses:

TUNED AMPLIFIERS 5.1 Introduction: To amplify the selective range of frequencies, the resistive load R C is replaced by a tuned circuit. The tuned circuit is capable of amplifying a signal over a narrow

### Utilization of a Piezoelectric Polymer to Sense Harmonics of Electromagnetic Torque

IEEE POWER ELECTRONICS LETTERS, VOL. 1, NO. 3, SEPTEMBER 2003 69 Utilization of a Piezoelectric Polymer to Sense Harmonics of Electromagnetic Torque P. Beccue, J. Neely, S. Pekarek, and D. Stutts Abstract

### Module 7 : Design of Machine Foundations. Lecture 31 : Basics of soil dynamics [ Section 31.1: Introduction ]

Lecture 31 : Basics of soil dynamics [ Section 31.1: Introduction ] Objectives In this section you will learn the following Dynamic loads Degrees of freedom Lecture 31 : Basics of soil dynamics [ Section

### P-810 P-830 Piezo Actuators

P-810 P-830 Piezo Actuators For Light and Medium Loads The newest release for data sheets is available for download at www.pi.ws. Cat120E Inspirations2009 08/10.18 1-70 P-810 piezo actuators Outstanding

### Extended Performance of Hybrid Actuators 1

Extended Performance of Hybrid ctuators 1 B. Clephas, H. Janocha Laboratory for Process utomation (LP), niversity of Saarland, 6641 Saarbrücken, Germany bstract. hybrid actuator basically consists of a

### Non-Collocation Problems in Dynamics and Control of Mechanical Systems

Cleveland State University EngagedScholarship@CSU ETD Archive 2009 Non-Collocation Problems in Dynamics and Control of Mechanical Systems Timothy M. Obrzut Cleveland State University How does access to

### Rotordynamics Analysis Overview

Rotordynamics Analysis Overview Featuring Analysis Capability of RAPPID Prepared by Rotordynamics-Seal Research Website: www.rda.guru Email: rsr@rda.guru Rotordynamics Analysis, Rotordynamics Transfer

### Modal Analysis of Microcantilever using Vibration Speaker

Modal Analysis of Microcantilever using Vibration Speaker M SATTHIYARAJU* 1, T RAMESH 2 1 Research Scholar, 2 Assistant Professor Department of Mechanical Engineering, National Institute of Technology,

### Lab 4. Crystal Oscillator

Lab 4. Crystal Oscillator Modeling the Piezo Electric Quartz Crystal Most oscillators employed for RF and microwave applications use a resonator to set the frequency of oscillation. It is desirable to

### An Experimental Evaluation of the Application of Smart Damping Materials for Reducing Structural Noise and Vibrations

An Experimental Evaluation of the Application of Smart Damping Materials for Reducing Structural Noise and Vibrations Kristina M. Jeric Thesis submitted to the Faculty of the Virginia Polytechnic Institute

### Applications area and advantages of the capillary waves method

Applications area and advantages of the capillary waves method Surface waves at the liquid-gas interface (mainly capillary waves) provide a convenient probe of the bulk and surface properties of liquids.

### Modeling of Electro Mechanical Actuator with Inner Loop controller

Modeling of Electro Mechanical Actuator with Inner Loop controller Patchigalla Vinay 1, P Mallikarjuna Rao 2 1PG scholar, Dept.of EEE, Andhra Universit(A),Visakhapatnam,India 2Professor, Dept.of EEE, Andhra

### Experiment VI: The LRC Circuit and Resonance

Experiment VI: The ircuit and esonance I. eferences Halliday, esnick and Krane, Physics, Vol., 4th Ed., hapters 38,39 Purcell, Electricity and Magnetism, hapter 7,8 II. Equipment Digital Oscilloscope Digital

### Response spectrum Time history Power Spectral Density, PSD

A description is given of one way to implement an earthquake test where the test severities are specified by time histories. The test is done by using a biaxial computer aided servohydraulic test rig.

### Power Enhancement for Piezoelectric Energy Harvester

, July 4-6, 2012, London, U.K. Power Enhancement for Piezoelectric Energy Harvester Sutrisno W. Ibrahim, and Wahied G. Ali Abstract Piezoelectric energy harvesting technology has received a great attention

### A study of Vibration Analysis for Gearbox Casing Using Finite Element Analysis

A study of Vibration Analysis for Gearbox Casing Using Finite Element Analysis M. Sofian D. Hazry K. Saifullah M. Tasyrif K.Salleh I.Ishak Autonomous System and Machine Vision Laboratory, School of Mechatronic,

### Velocity and Acceleration Measurements

Lecture (8) Velocity and Acceleration Measurements Prof. Kasim M. Al-Aubidy Philadelphia University-Jordan AMSS-MSc Prof. Kasim Al-Aubidy 1 Introduction: The measure of velocity depends on the scale of

### Electrical Engineering / Electromagnetics

Electrical Engineering / Electromagnetics. Plot voltage versus time and current versus time for the circuit with the following substitutions: A. esistor B. Capacitor C. Inductor t = 0 A/B/C A. I t t B.

### Wave Motion Demonstrator. Instruction Manual

Wave Motion Demonstrator Instruction Manual CONTENTS 4 INTRODUCTION 6 THEORY 7 DEMONSTRATIONS 16 APPENDIX 18 GENERAL INFORMATION 3 INTRODUCTION The Wave Motion Demonstrator (WMD) uses mechanical waves

### Automatic Control Systems 2017 Spring Semester

Automatic Control Systems 2017 Spring Semester Assignment Set 1 Dr. Kalyana C. Veluvolu Deadline: 11-APR - 16:00 hours @ IT1-815 1) Find the transfer function / for the following system using block diagram

IV SEMESTER FINAL EXAMINATION- 2002 SUBJECT: BEG232EC, Instrumentation Candidates are required to give their answers in their own words as far as practicable. The figure in the margin indicates full marks.

### ELECTROMAGNETIC MULTIFUNCTIONAL STAND FOR MEMS APPLICATIONS

ELECTROMAGNETIC MULTIFUNCTIONAL STAND FOR MEMS APPLICATIONS 1 Cristian Necula, Gh. Gheorghe, 3 Viorel Gheorghe, 4 Daniel C. Comeaga, 5 Octavian Dontu 1,,3,4,5 Splaiul Independenței 313, Bucharest 06004,

### A Rapid Modeling and Prototyping Technique for Piezoelectric Energy Harvesting Systems

SENSORDEVICES 011 : The Second International Conference on Sensor Device Technologies and Applications A Rapid odeling and Prototyping Technique for Piezoelectric Energy Harvesting Systems Aldo Romani,

### MEAS Silicon MEMS Piezoresistive Accelerometer and its Benefits

MEAS Silicon MEMS Piezoresistive Accelerometer and its Benefits Piezoresistive Accelerometers 1. Bonded Strain Gage type (Gages bonded to metal seismic mass using epoxy) Undamped circa 1950 s Fluid (oil)

### MEMS for RF, Micro Optics and Scanning Probe Nanotechnology Applications

MEMS for RF, Micro Optics and Scanning Probe Nanotechnology Applications Part I: RF Applications Introductions and Motivations What are RF MEMS? Example Devices RFIC RFIC consists of Active components

### Lab 11. Speed Control of a D.C. motor. Motor Characterization

Lab 11. Speed Control of a D.C. motor Motor Characterization Motor Speed Control Project 1. Generate PWM waveform 2. Amplify the waveform to drive the motor 3. Measure motor speed 4. Estimate motor parameters

### Electronic Instrumentation and Measurements

Electronic Instrumentation and Measurements A fundamental part of many electromechanical systems is a measurement system that composed of four basic parts: Sensors Signal Conditioning Analog-to-Digital-Conversion

### Penn State Erie, The Behrend College School of Engineering

Penn State Erie, The Behrend College School of Engineering EE BD 327 Signals and Control Lab Spring 2008 Lab 9 Ball and Beam Balancing Problem April 10, 17, 24, 2008 Due: May 1, 2008 Number of Lab Periods:

### MAHALAKSHMI ENGINEERING COLLEGE TIRUCHIRAPALLI UNIT III TUNED AMPLIFIERS PART A (2 Marks)

MAHALAKSHMI ENGINEERING COLLEGE TIRUCHIRAPALLI-621213. UNIT III TUNED AMPLIFIERS PART A (2 Marks) 1. What is meant by tuned amplifiers? Tuned amplifiers are amplifiers that are designed to reject a certain

### MODELLING AND CHATTER CONTROL IN MILLING

MODELLING AND CHATTER CONTROL IN MILLING Ashwini Shanthi.A, P. Chaitanya Krishna Chowdary, A.Neeraja, N.Nagabhushana Ramesh Dept. of Mech. Engg Anurag Group of Institutions (Formerly C V S R College of

### Self powered microsystem with electromechanical generator

Self powered microsystem with electromechanical generator JANÍČEK VLADIMÍR, HUSÁK MIROSLAV Department of Microelectronics FEE CTU Prague Technická 2, 16627 Prague 6 CZECH REPUBLIC, http://micro.feld.cvut.cz