车辆半主动悬架与助力转向集成控制的仿真研究

Simulation Research on Integrated Control of Vehicle Semi-active Suspension and Power Steering

为协调车辆操纵稳定性和行驶平顺性,基于底盘系统动力学原理,建立了半主动悬架和电动助力转向的综合模型,对半主动悬架和电动助力转向系统进行集成控制。运用二次反馈法和PID策略分别对悬架的可调阻尼和转向系统的助力进行控制。仿真结果表明,在集成控制情况下,车辆的操纵稳定性和平顺性均优于悬架或转向单独控制的效果。

For coordinating handling stability and ride comfort of vehicle, based on the principle of chassis system dynamics, a combined model for semi-active suspension （SAS） and electric power steering （EPS） is set up for imposing integrated control on the systems of SAS and EPS. Quadratic feedback and PID strategies are used to control the adjustable damping of suspension and the assistant power of EPS respectively. The simulation results show that with integrated control, the handling stability and ride comfort of vehicle are both superior to that with separate control on suspension or steering.