磁流变半主动悬置系统与悬架系统微粒群优化集成控制

摘要

为有效地改善车辆乘坐舒适性和行驶安全性，基于车辆系统动力学理论，建立了含半主动悬置系统与半主动悬架系统的整车动力学模型。利用线性二次型最优控制原理设计了集成控制器，并采用微粒群优化算法对集成控制器的权系数进行优化设计。以车体的垂直加速度、侧倾角加速度、俯仰角加速度作为评价指标，对车辆磁流变半主动悬置系统与磁流变半主动悬架系统集成控制进行了仿真计算。结果表明：集成控制的峰值比独立控制分别减少了7.22％、14．38％和12．75％，集成控制的均方根值比独立控制分别减少了8．58％、22．38％和4.13％，经过集成控制后的车辆综合性能明显优于独立控制。%To effectively improve the ride comfort and the driving safety of the vehicle,based on the vehicle system dynamics theory,the vehicle dynamic model including the semi-active mounting system and the semi-active suspension system was established.The integrated controller was designed by using the principle of linear quadratic optimal control,and its weights coefficient was optimized with the particle swarm optimization.Taking vertical vibration acceleration,roll angle acceleration and pitching angle acceleration as evaluation indicators,the simulation research for integrated control of the magneto-rheological semi-active mounting system and the magneto-rheological semi-active suspension system had been done.The results showed that the peak value of the integrated control than the independent control were reduced by 7.22%,14.38% and 12.75% respectively,and the root mean square value of the integrated control than the independent control were reduced by 8. 58%,22.38%and 4.13%respectively.The vehicle comprehensive performance using the integrated control was absolutely advanced than those using the independent control.