Progress Report: Lab 5 System analysis 2 & Design Analysis Tool ENGR Shreyas Doejode Asad Idris Menan Kedai Kaixin Luo Due Date: February

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Cornelia Griselda Chapman
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1 Progress Report: Lab 5 System analysis 2 & Design Analysis Tool ENGR Shreyas Doejode Asad Idris Menan Kedai Kaixin Luo Due Date: February 8th, 2017

Backwards Looking Summary In this lab 4, the end goal was to be able to download data from the automatic control system, convert EEPROM arduino data to physical parameters, and with those physical

2 Backwards Looking Summary In this lab 4, the end goal was to be able to download data from the automatic control system, convert EEPROM arduino data to physical parameters, and with those physical parameters, be able to calculate the performance characteristics. The reason the performance characteristics need to be calculated is so that the performance analysis can be plotted to better understand when and where the motors would output certain levels of power. With a visual example of the power output levels, we can alter our code based out coasting distance and how much further the AEV went. Based on the graph that we got, we could alter the code by changing the absolute position from 240 to 230 since the AEV went a little past the stopping point. Overall, the team felt that the overall power consumption from the motor was too high. Thus, the team came to the conclusion that the motors should be used in a push pull configuration. Therefore, the code would need to be altered for the change in polarity of one of the motors. Figure 1.Data from Test Run The figure above displays all the data that was obtained through one of the test runs. The arduino board recorded the Time, Current, Voltage, Marks(cumulative), and Marks(position wheel). With these values recorded, the Time, Current, Voltage, Distance, Relative Position, Supplied power, Incremental energy, and Total energy were all the physical parameters that could be calculated. The code use for this specific figure was motorspeed(4,25) and gotoabsoluteposition(240). When run on the track, the AEV went a little bit past the stopping point. To adjust this, the absolute position point should be decreased to either 235 or 240. This can be confirmed by doing a few more test runs to narrow down a more accurate tick mark number. Once the physical parameters were calculated, we proceeded to write the code in matlab to be able to use the data analysis tool. A big takeaway from this example would be to come more prepared during lab hours. Since part of the group was working on the report, we could not focus on doing more trial runs. Portions of this report should be discussed ahead of time so that on Tuesday s, the lab can be focused on and completed.

3 Forwards Looking Summary A few things that will be taking place this upcoming week will be narrowing down our design ideas and coming up with a 3D model for a new base to be 3D printed. As of now, we have narrowed down our designs to 3-4 simple base concepts. More tests will be conducted over which base is more stable. Once the designs have been narrowed down to 2 ideas, the one with the most votes will be 3D printed. As of right now, there are not any pieces that we need to have laser cut. As the build process goes on, this may change as we change the base. The main materials that will be used for our AEV would be the motors, servos, and plastic pieces already given. Some of our parts such as a motor, servo, and/or propellor may be store bought depending on our final design. There is a chance that we will have 3D brackets printed and new chassis laser cut. For this upcoming week, a realistic goal would be to have majority of the code by Tuesday(2/14). Once the majority of the main code has been written, it can be altered as the testing process continues. For example, if 240 marks is pushing the AEV past the stopping point, the tick marks will be adjusted to Secondly, we will come up with a 3D design of the part that must be 3D printed and decide if any parts need to be laser cut. From this point, we simply need to keep tweaking the AEV when necessary. Monday(2/13) - Meet together and talk about all the ideas that were discussed in class on Wednesday. Tuesday(2/14) - Begin writing code - Narrow down ideas for 3D design Wednesday(2/15) - Complete in class lab - Do a couple trial runs with new code and chassis Thursday(2/16) - Assign portions of lab report to each member Friday(2/17) - Work on Lab Report for next week Saturday(2/18) - Continue working on code(concept behind code because we will not be able to test it) Sunday(2/19) - Read on Procedure for upcoming lab

4 Appendices Figure 2.Phase Diagram Figure 3. Phase Diagram with Phase Regions

5 Table 1. Breakdown of Phase Sensor Phase Arduino Code Time (sec.) Total Energy (J) 1 motorspeed(4,25); gotoabsoluteposition( 240); sec J 2 Coasting Phase 3 sec 0 Figure 4. Digital Analysis Energy vs Distance Total Energy = J

6 Figure 5. Digital Analysis Energy vs Time

8 Matlab Code: %=================================================================== %Name %Date %Class %Program title: Performance Analysis %Program Description: % this is the basic analysis about our AEV. %==================================================================== r = xlsread('test_run_3.xlsx','a9:e207');

9 timediff =60/1000; time=(r(:,1))/1000; current = (r(:,2)/(1024*0.185))*2.46; voltage =(15*r(:,3))/1024; markcum = (.0124*r(:,4)); marknet = (.0124*r(:,5)); power = current.*voltage; meanpower = []; a1=0; a2=power(1); for i = 2:length(current) end a1=a2; a2=power(i); mean = (a1+a2)/2; meanpower(i)=mean; plot(time,meanpower); Energy = sum(meanpower) title('time vs Power'); xlabel('time(s)'); ylabel('power(watts)'); grid on; box on; xr=7.741; xl= 0; il=knnsearch(time,xl); ir = knnsearch(time,xr); P1=power(iL:iR); t1 = time(il:ir); %text() %legend('');

10 Meeting Notes - Finalize sketch for designs down to 1-2 ideas - Need to start coming up with 3D design for base - Start working on Lab Report on Thursday - Begin finalized designs

ADVANCED ENERGY VEHICLE DESIGN PROJECT. AEV Lab Guidelines

THE OHIO STATE UNIVERSITY ENGINEERING EDUCATION INNOVATION CENTER 2 Hitchcock Hall, 27 Neil Avenue, Columbus, OH 21 First-Year Engineering Program: ADVANCED ENERGY VEHICLE DESIGN PROJECT AEV Rev. 8221