汽车电液主动悬架的预测控制

在建立二自由度主动悬架和电液伺服作动器集成模型基础上,应用预测控制理论,采用多步预测、滚动优化和在线校正等控制策略进行预测控制器的设计.对B级路面激励输入下,车辆分别处于空载和满载两种工况进行模拟仿真.仿真结果表明：具有预测控制策略的电液主动悬架系统对由路面输入引起的振动能有效抑制,车身垂直加速度、悬架动挠度和轮胎动载荷与被动悬架、PID控制的主动悬架相比明显降低,车辆的行驶平顺性得到很大改善,预测控制器在参数变化及路面扰动下具有较强的鲁棒性.

Predictive Control of Automobile Electro-hydraulic Active Suspension

Based on the integrated model of two DOF active suspension and electro-hydraulic servo actuator,a model predictive controller was designed by using control strategies of multi-step forecast,rolling optimization and online correction of predictive control theory.Simulations of vehicle with the working conditions of null load and full load were done under B level road surface excitation signal.Simulation results showed that the electro-hydraulic active suspension system with a model predictive controller can effectively reduce the vibrations caused by road excitation,and there were obvious reduction in the body acceleration,the suspension dynamic deflection and the tire dynamic load respectively compared to passive suspension and the active suspension with PID controller,which improved the ride smoothness and showed predictive controller has better robustness under parameter variation and road disturbance.