Reflectance Sensors and Built AEV (First Build):
Madison’s Sketch:
Madison’s design used the L shaped arm with the battery and controller attached to the bottom platform and the motors attached to the back. Her design utilized a braking arm that was above the AEV. This would improve the accuracy of the AEV braking.
Pros: Madison’s design improved the inaccurate braking of the AEV.
Cons: Madison’s design was not energy efficient.
Jacob’s Sketch:
Jacob’s design had two platforms coming off the arm with a motor off each. This would improve distribution of the motors’ force.
Pros: Jacob’s design improved the motor force distribution.
Cons: Jacob’s design had too much mass.
Adam’s Sketch:
The goal of Adam’s design was to evenly distribute the mass of the AEV to create better balance and to relocate the motors so their force was more towards the center of mass. He used the T-shaped arm for the best balance and put the AEV controller on one side of the arm and the battery on the other side. Adam moved the controller and battery forward to balance the weight of the motors on the back of the AEV.
Pros: Adam’s design improved balance, force distribution of the motors, and energy efficiency.
Cons: A new platform would need to be 3D printed.
Lauren’s Sketch:
Lauren’s design utilized the T-shaped arm. She chose to put the AEV body in the center of the leg to balance the vehicle. Lauren stacked the motors to more evenly disperse their power. She also tried to eliminate extra plastic on the frame in hopes of making the AEV lighter. In addition to the parts in the kit, Lauren’s design would require three 3D printed attachments (the piece where the control system was placed, the battery holder, and the motor holder on the back). The pointed dome would be cardboard for modeling purposes. The dome was designed to increase the safety of passengers, an important aspect of the MCR.
Pros: Lauren’s design highlighted balance, mass reduction, and safety.
Cons: 3D printing three parts would be expensive.
Screening Table:
AEV Sample Design Madison Lauren Adam Jacob
Mass +’+’+’+ +’+’+’+ +’+’+’+ +’+’+’+
balance 0’0’0’0 +’0’0’+ +’+’+’+ 0’0’0′-
durability +’0′-‘0 0’0’+’0 0’0’0’+ -‘0’-‘0
energy efficiency +’+’+’0 +’+’+’0 +’+’+’0 +’+’+’0
safety 0’0’0’0 +’+’+’0 0’0’+’0 +’0’0’0
Totals
+’ 4 7 5 4
0′ 7 5 7 6
-‘ 1 0 0 2
Scoring Table:
AEV Sample Design/% weight Madison Lauren Adam Jacob
Mass/25% 3 2.5 3.75 3
balance /25% 3 4 4 3
durability/15% 2.5 2.5 2.5 2.5
energy efficiency/20% 2.5 2.5 3.75 2.5
safety/15% 1.25 2.5 1.5 1.25
Total score 2.5625 2.875 3.2875 2.5625
Conclusion: Adam and Lauren’s AEV concepts will be carried forward in the design cycle.
Team G’s First Prototype Sketch:
