Semi-active suspension control with polynomial inverse model: Frequency response analysis and HIL simulation

This work presents a control method for semi-active suspension equipped with magneto-rheological(MR) damper based on polynomial inverse model. Aiming at the nonlinearity and hysteresis characteristic of MR damper, this paper analyzes the properties of polynomial model and gives a parameters identification method for polynomial model. Then, the amplitude-frequency characteristic of semi-active suspension closed-loop system is analyzed to reveal the control performance of method in this paper and the results show that method here can effectively reject the disturbance at both low frequency and medium frequency domain. Further, to verify the feasibility and effectiveness, the algorithm is realized with an electronic controller and verified through hardware-in-loop simulation and results show that method here can decrease the vehicle body acceleration in different road conditions.