Graphs

Observation of the Final Test Run

During the test run of the Three-Motor AEV, the group observed that the AEV needs at least 40% motor speed to break the initial static friction. The same goes for the Two-Motor AEV. Based on the result, the group decided to stick to the Two-Motor design which is lighter in weight and easier to assemble. Figure 1 and Figure 2 demonstrate the behavior of the AEV during the final performance run. In Figure 1, three separate test runs of the same code were recorded. The shape of each individual graph is almost identical to one another; this demonstrates that the AEV was functionally working and there was no defect in any parts of the AEV(ie. arduino, reflectance sensor, battery). The gap between each peak on the graph is the interval of time when AEV stopped on the monorail. Each peak demonstrates the AEV in motion and the power output at the time. Notice that at the beginning of each peak, a higher power was used for a fraction of a second. That is when the motors were at 40% to break the initial friction and afterwards, the power output is consistent throughout the run, which is demonstrated in Figure 2.

Figure 1: Power(w) Vs. Time(s)

Figure 2: Power(w) Vs. Distance(m)