Half Car Active Suspension System

Syazana, Sapie (2010) Half Car Active Suspension System. Project Report. UTeM, Melaka, Malaysia. (Submitted)

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Abstract

An early design for automobile suspension systems focused on unconstrained optimizations for passive suspension system which indicate the desirability of low suspension stiffness, reduced unsprung mass, and an optimum damping ratio for the best controllability. Thus the passive suspension system, which approach optimal characteristics, had offered an attractive choice for a vehicle suspension system and had been widely used for passengers. However, the suspension spring and damper do not provide energy to the suspension system and control only the motion of the car body and wheel by limiting the suspension velocity according to the rate determined by the designer. To overcome the above problem, active suspension systems have been proposed by various researchers. The purpose of this project is to present a modeling and control of the half car active suspension system using Fuzzy Logic Controller techniques. In this project, a mathematical model is represented which will give a much more complete mathematical representation of a suspension system for the half car model. In order to achive the desired ride comfort and road handling and to solve the mismatched condition, a fuzzy logic control will be utilized to deal with the system uncertainties. Finally, a simulation of a half-car active suspension system will be carried out using Matlab/Simulink software. Some comparison and analyses will be made from the simulation results.

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