半主动悬架SH-LQR阻尼控制策略仿真研究

Simulation Analysis of SH-LQR Damping Control Strategy for Semi-active Suspensions

半主动悬架在被动悬架和主动悬架之间实现了成本和效果的良好结合。以半主动悬架控制策略作为分析研究对象。根据分析表明,传统的开关天棚控制方法和LQR方法分别在低频段和高频段有较好的效果,两种方法具备一定的互补特性。因此给出一种结合的分频方式,提出SH-LQR联合控制的方法并首先在1/4车辆模型上进行验证,证明该算法在全频域段的有效性。而后将该算法从1/4模型移植到半车模型上,通过MATLAB/Simulink进行了验证。结果表明,使用SH-LQR控制的半主动悬架有较好的减振效果。

Semi-active suspensions are more economic than passive or active suspensions.The traditional switch skyhook(SH)control is more effective in low frequency band while the LQR control is more effective in high frequency band.So,there must exist some complementarity between the two control methods.This paper analyzes the control strategy of semi-active suspensions.The result indicates that the semi-active suspension controlled by SH-LQR method is effective in the vibration reduction in full frequency range.