车辆主动悬架Terminal滑模控制研究

Research on Terminal Sliding-Mode Control of Vehicle Active Suspension

针对车辆主动悬架系统的控制优化与系统动态品质等问题,提出基于Terminal滑模的主动悬架控制策略。建立1/4主动悬架动力学模型与天棚阻尼参考模型,以簧上质量与簧下质量的位移及其加速度作为状态变量建立运动状态方程;其次基于Terminal函数构造滑模函数,设计主动悬架滑模控制律;最后在MATLAB/Simulink平台搭建仿真模型进行验证,结果表明所提出的控制器优化了悬架系统的性能指标,改善了车辆行驶顺性。

Aiming at the dynamic response quality and optimal control of vehicle active suspension system,a control strategy for active suspension based on terminal sliding mode was proposed.The 1/4 dynamical model of active suspension and the reference model for skyhook suspension were established.The motion state equation was established by using the displacement and acceleration of the sprung mass and unsprung mass as the state variables.Secondly,the sliding mode function was constructed based on the Terminal function,and the sliding mode control law of the active suspension was designed.Finally,a simulation model was established on the MATLAB/Simulink platform for verification.The results show that the proposed controller optimizes the performance indicators of the suspension system and improves the riding comfort of the vehicle.