Abstract
Suspension system plays an important role in isolating vehicle body from road shocks and vibrations. The aim of suspension system is to improve ride comfort, road handling and stability of vehicles. Three different active controllers are designed using 3 Degree of Freedom (DOF) quarter car model to compare the performance of three controllers with the passive suspension system. The three controllers designed are PID controller, Linear Quadratic Controller (LQR) and Fuzzy logic controller. In this work, MATLAB/SIMULINK software is used for simulation purpose and simulation result demonstrate that active suspension system shows better result in comparison to passive suspension system with reference to maximum amplitude, body acceleration, suspension deflection and settling time. Also the result of comparison displays that fuzzy logic control exhibits better functioning and stability as compared to other control methods and passive as well.
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