基于带死区PID控制的车辆磁流变座椅悬架的仿真

Simulation of Vehicle Magnetorheological Seat Suspension Based on Dead Zone PID Control

采用Lord公司生产的磁流变阻尼器RD1005来代替座椅悬架中被动阻尼器,构建磁流变半主动座椅悬架系统。针对此系统建立了人体—座椅的5自由度动力学模型,其中磁流变阻尼器采用改进的Bouc-Wen模型,采用了基于带死区PID控制器,依靠实时加速度信号在线调整控制量,达到最优减振效果。用MATLAB/SIMU-LINK建立系统的仿真模型。仿真结果表明,该控制器能有效地改善座椅的减振效果,减小驾驶员所受到的振动冲击,提高了乘坐舒适性。

A semi-active seat suspension scheme was presented by using magnetorheological （MR） damper RD1005 of Lord Company to replace the passive damper of traditional seat suspension. A human body-seat five-DOF dynamics model was established to this system which included a modified Bouc-Wen model for the MR damper. A dead zone PID controller was adopted and it could tune the control signals on online way based on the real-time acceleration signals to reach the optimal vibration attenuating performance. A simulation model was established with MATLAB/SIMULINK. Simulation results show that this controller could effectively improve the anti-vibration effect of the seat, decrease the shock on the driver, and improve the riding comfortableness.