Abstract：The variable universe fuzzy proportionalintegraldifferential(PID) control method based on genetic algorithm (GA) was proposed for the quartercar active suspension system. Based on the establishment of the active suspension system model, the fuzzy PID controller was designed by introducing the idea of variable universe. To further improve the vibration attenuation effect of the controller, GA was employed to optimize the parameters in description functions of the expansion factor for variable universe. The simulation results show that compared with PID, fuzzy PID and unoptimized variable universe fuzzy PID control methods, the GAbased variable universe fuzzy PID method has superiority for reducing the vertical acceleration of the vehicle body and improving the ride comfort. The proposed control method has strong robustness against uncertainties of sprung mass and vehicle speed.
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