Cruise control system for the DLSU eco car team 2014 battery electric vehicle

• Main Authors: Bayron, Christopher John D., Sacdalan, Sheena Marie C., Wee, Aaron John T.
• Format: text
• Language: English
• Published: Animo Repository 2014
• Online Access: https://animorepository.dlsu.edu.ph/etd_bachelors/12134
• Institution: De La Salle University

Fuel efficiency is one of the concepts in the automobile industry that has made itself noticed by vehicle owners. One of the events that allow student groups and enthusiast to showcase their enthusiasm and eagerness in the development of this concept is the Shell Eco-Marathon competition, which is basically a competition of greatest mileage. To win the race, the participants of the competition must be able to design vehicles of great efficiency, however, a great part of winning the race is the drivers ability to follow a race strategy that, as theoretically determined, will yield the greatest mileage for the vehicle. The group proposed the implementation of a cruise control system to address this issue. The cruise control system applied (1) implements the cruise control on a predetermined race strategy, (2) incorporates the use of a PID controller for the system, (3) implements it in a computing device, which is either a minicomputer or a microcontroller. Along with the predefined course for testing, the determination of the race strategy is aided by the use of a motor test bench. The electrical system as a whole also acquires GPS and IMU data as additional vehicle parameters. A tool to such as the PID controller was used in optimizing the desired motor speed. For this case, the parameters used are as follows: Kp = 0.135, Ki = 0.14, and Kd = 0.037. Data gathered from various tests had shown that the proportional, integral and derivative values are needed to stabilize the response of the controller. The results also proved that the use of PID allows the feeding of throttle voltage to the motor to be responsive faster than if it were manually controlled. In conclusion, the group was able to meet all the required objectives of the thesis project. The cruise control system was implemented in a test battery electric vehicle. The results of the experimentations showed that the system yielded greater mileage as composed to running the vehicle through manual driving. The testing of the cruise control using the entire track length resulted to a rise time of 2.676 s, settling time of 13.036 s, overshoot of 13.67% and steady-state error of 2.27%.