Optimal Control Research on Vehicle Magnetorheological Semi-Active Suspension of Four Degrees of Freedom

doi:10.16182/j.issn1004731x.joss.19-0036

Abstract

Abstract: Based on system dynamics theory of vehicle, aiming at the model of 1/2 vehicle suspension, the vehicle magnetorheological semi-active suspension dynamic equation and space state equation with four degrees of freedom are established. A linear two times optimal controller and control algorithm for semi-active suspension are designed, and the control strategy based on magnetorheological damper of subdivision vibration velocity is proposed. Suspension simulation model is established to analyze the optimal control effect in SIMULINK. The results show that the magnetorheological semi-active suspension system based on the optimal control of the vehicle can reduce vehicle vertical vibration acceleration and vehicle pitch angle acceleration, and thus effectively improves the suspension performance.

Key words: semi-active suspension, magnetorheological damper, optimal control, four degrees of freedom

CLC Number:

U463.33

Jia Yongshu, Miu Ahai. Optimal Control Research on Vehicle Magnetorheological Semi-Active Suspension of Four Degrees of Freedom[J]. Journal of System Simulation, 2020, 32(9): 1818-1824.

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