In this lab, the group members were required to learn about how to download data from the automatic control system and how to convert EERPOM Arduino data to physical parameters. In addition, it was also illustrated in the lab about how to use physical parameters to perform calculations to determine the performance characteristics of AEV. The team was also taught about methods of measuring and evaluating the performance of AEV.
The lab data calculation results are shown in Table 1.
Table1: Phase Breakdown for Plot of Supplied Power v.s. Time
The phase breakdown testing result plot is as shown in Figure 1. As the plot shows, when motors reverse, the AEV power output would reach to a climax(Phase 1 and Phase 4). Also, when using goFor() command, the plot would be horizontal. The team also discovered when motor speed is higher, the power output standard deviation would be smaller(Phase 2, Phase 3 and Phase 5), this means if AEV runs faster, it would be more stable. Additionally, the brake() command would immediately cut off the power output, which is useful for reducing energy consumption. And in Phase 6, the power output slightly rises after AEV stops. The team believes this was caused by AEV controller’s data collecting process.
Figure 1: Plot of Supplied Power v.s. Time
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Appendix