Performance Test One

  • For performance test one, Team K was focusing on choosing the final AEV design. First, two design prototypes were chosen according to the creative design process from the Preliminary R&D.
  • The first prototype has vertical wings and a T-shape base as seen below.

Figure 1: Design A

  • The second prototype has diagonal wings and a T-shape base seen below.

Figure 2: Design B

  • A uniform set of code was used for testing those two prototypes:
celerate(4,0,25,3);//Accelerate all motors from start to  25% in 3 seconds.
motorSpeed(4,25);
goToAbsolutePosition(244);//Run all motors at a constant speed (25% power) for 2 second and using the goToAbsolutePosition function travel a total distance of 244 marks.
reverse(4);//Reverse all motors.
motorSpeed(4,25);
goFor(2);//Run all motors at a constant speed (25% power) for 2 second.
brake(4);//Brake all motors
goFor(6);//For 6 seconds
reverse(4);//Reverse all motors
celerate(4,0,25,3);//Accelerate all motors from start to  25% in 3 seconds.
motorSpeed(4,25);
goFor(2);//Run all motors at a constant speed (25% power) for 2 second
brake(4);//Brake all motors
  • The plots of Power vs. Time and Power vs. Distance of those two design are provided below.

Figure 3: power vs. time for performance test 1

Figure 4: power vs. distance for performance test 1

Blue line: Design A

Red line: Design B

  • By using the MATLAB analysis tool, the energy used by Design A was found to be 64.194 joules, and the energy used by Design B was 72.196 joules.
  • The figures Power vs. Time and Power vs. Distance also show that Design A used less power than Design B, especially for the coasting part, which is between 19 seconds and 24 seconds. Overall, the power used by Design A was much less than the power used by Design B.
  • The concept scoring for Designs A and B is presented below.

  • By observation of each team member, Design B started slower than Design A during acceleration.
  • The stability and safety of Design A and Design B were almost the same.
  • In conclusion, Design A has been chosen for future testing.