Lab 4: Design Analysis Tool

  

In the power vs. distance graph, the figure is representative of the path taken by the AEV. The first block of the chart is the motor starting and accelerating to 25% power. The sharp drop off is when the power is lowered for a couple seconds. The extra tall line is the reverse of the direction of the motors, with the last tall block being the running at 25% power. The final drop to no power is the motors braking. The various power levels are present as straight lines because they are simply the measure of the power for the distance traveled. The power drop to 20% only ran for 2 seconds, but this was also the power for which the most distance was covered.

 

The power vs time graph represents the dynamic power output as time continues. The large “hill” at the beginning of the run shows how the motor took time to get to the assigned power, where it ran (had the same power output) for another second. The steep drop at 4 seconds is the motor speed dropping to 20%. The sharp spike then drop is the power required to reverse the motors and run at 25% power. The final drop shows the braking of the motors.

Both charts grant the ability to approximate the energy in a run of the vehicle, and therefore improve upon design efficiencies. The area under the chart is the energy used.