Concept Scoring and Design Evolution

AEV 3-View Concepts

Concept Scoring (each cell rated 1 through 10, 10 being best possible)

Specification Overview:

Safety: As stated in our AEV Approach, we value safety above everything else. As such it is our obligation to customers to create a product that is as safe for them to use as possible.

Accuracy: Due to the practical inability for us to build and test each design to obtain precise specification scores, certain ratings can only be assigned via educated guesses. The accuracy rating was determined by group mates giving an educated guess about how well we could make their AEV design start and stop “on a dime”. This includes factors like estimated braking ability and number of motors in design.

Weight: Having a heavy design has a number of drawbacks that would not have had a positive effect on the AEV’s performance. Such effects of heavier AEV’s include but are not limited to creating a greater friction force when moving on the track, increasing energy consumption as the motors adjust to moving the larger object, and lengthening time and distance it takes for the AEV to brake.

Estimated Speed: This rating was determined by group mates giving an educated guess on their design’s max “comfortable” speed. We considered the AEV’s max comfortable speed to be the maximum speed the AEV could accomplish while still being safety standards and being easily stopped via its brakes. Estimated aerodynamics or each design was also taken into consideration, especially considering how each design would fare on the return trip.

Efficiency (Energy): This rating was obtained by taking rough averages of the Weight and Estimated Speed specifications. Energy efficiency and safety are our number one priorities as stated, therefor explaining why they have the highest weights among the specifications.

Efficiency (Cost): Our performance is partially determined by our overall cost, hence a high rating assigned to or ability to minimize our costs in relation to the AEV’s output quality. This rating was determined by comparing the cost of parts used vs its energy efficiency.

Build Difficulty: A third type of efficiency was defined in our AEV approach, efficient use of our time. Therefore, we cannot ignore the value of having an easier-to-build AEV given that the easier it is to build the quicker it will be for us to assemble.


Indra AEV : This sketch will or will not be successful because it not well dimension and it was drawn in different graphing sheet. If this drawing is drawn in regular sheet and includes dimension than it have chance to become successful in future. Additionally, the 3D-printed front piece raises aerodynamic concerns when the AEV is moving backwards down the track.


Jack AEV: The sketch uses the same basic design as the Sample AEV. Crucial electronic parts will be fixated to the top and bottom. A shell resembling the front of a bullet or airplane makes the AEV aerodynamic. The shell cuts off before the end to conserve weight. The aerodynamic shell will not be reasonable when the AEV is travelling backwards.


John AEV: The sketch of this design focuses on improving two key components: Aerodynamics and Power. Two more motors were added and the body was based off of an airplane which will potentially allow it to travel efficiently and rapidly. The additional motors will increase the maximum speed and braking ability, but decrease the energy efficiency.


Ron AEV: The sketch is based off of the first AEV that we assembled. The two motors are to be placed near the center of mass and the electronic parts are distributed along the top in a way that allows for the AEV to sit not on an angle. I did not include an aerodynamic covering to see if saving weight would be a greater benefit than being aerodynamic at the low speeds. Also, the servo motor is used in this design as a break by applying pressure to one wheel when activated.


AEV Final Concept

This drawing was selected to be put into production because of its uniqueness and stability. With the majority of the weight directly under the wheels, the AEV will hang perfectly vertical. This AEV will also conserve weight and therefore money by fitting all of the necessary components on one base.


AEV Final

Testing on the final AEV is still being conducted.