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For the riding comfort and handling safety of vehicle, an active suspension system with adjustable fuzzy controller is advanced. According to the evaluation method of vehicle vibration performance, the acceleration of the sprung mass, dynamic tire load between wheels and road and dynamic deflection between the sprung mass and the unsprung mass are determined as the evaluation targets of suspension performance. For two degree-of-freedom (DOF) vehicle model, the simulation of vehicle performance in road signal is studied. Its results show the active suspension controller can reduce the acceleration of the sprung mass by a factor of 20. On the experiment study of vehicle model, the results further prove that the active suspension controller can effectively control the vibration of vehicle system.