Development Of Active Suspension For Passenger Car

Kow, Kok Lim (2013) Development Of Active Suspension For Passenger Car. Project Report. UTeM, Melaka. (Submitted)

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Abstract

In this project, the active suspension for passenger car was developed and simulated by using Matlab SIMULINK software for improvement of ride performance. Vehicle suspension is a system that capable to absorb the potential energy from road disturbance and dissipated it via damper. For passive suspension, the low spring stiffness will lead to good in ride performance but sacrifice the vehicle handling whereas high spring stiffness results in poor in ride comfort but improve the vehicle handling. Thus, there is compromise between ride and handling performance. In order to enhance the ride performance, the only possible solution is to adopt an active suspension whereby a hydraulic actuator is installed parallel with spring and damper in vehicle suspension system. The objectives of this project are to develop the vehicle model in Matlab/SIMULINK software and develop several control strategies for active suspension development. The quarter car and full vehicle ride model is adopted in development of active suspension with proposed types of control strategies. The Matlab/SIMULINK software is used to compare the performance between passive and active suspension. From the result section, the unwanted vehicle body heaves, pitch, and roll motion were reduced and the stability of vehicle body was increased. In conclusion, the rejections of unwanted vehicle body heave, pitch, and roll motion which is using proposed control strategies in vehicle suspension system was improved the comfortable of passengers and driver in vehicle.

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