Dynamic Analysis and Fuzzy-PID Control Simulation of Semi-active Vehicle Suspension

A half-vehicle 4DOF dynamic model was built up,as a non-linear,time-delay and uncertain system of vehicle suspension,the parameters of self-adjusting fuzzy PID controller of semi-active suspension was designed,which can achieve the functions of PID parameters on-line amendment,and the C-class road as an input signal.The Matlab/Simulink simulation software is used for simulating the smoothness indicators of the semi-active suspension model.The results show that the fuzzy PID control of semi-active suspension compared to passive suspension and fuzzy control of semi-active suspension,the body vertical acceleration,the body pitch angle acceleration,suspension dynamic deflection,tire dynamic load and other indicators of smoothness have greatly improved;fuzzy PID control has better adaptive ability.