一种改进的天棚半主动控制算法

An Improved Skyhook Semi-active Control Algorithm

摘要:

针对传统天棚阻尼控制对参数可变的磁流变半主动悬挂系统不能进行有效控制的问题,设计了一种最小控制综合与天棚混合的控制算法；首先建立了理想天棚阻尼控制算法的模型,依据最小控制综合算法模型结构特点将理想天棚阻尼控制作为参考模型；然后依据磁流变阻尼器控制力特点,改进了最小控制综合算法的反馈控制方程,得到混合控制算法的控制律；最后对改进的算法进行了仿真分析；仿真结果表明,混合控制算法在悬挂系统参数发生变化的情况下能够有效降低车体加速度和车轮动载荷,具有较好的控制效果；所设计的改进的天棚半主动控制可以提高车辆的行驶平顺性,对被控系统参数的变化具有良好的适应性,具有较高的实用价值。

Abstract:

A minimal control synthesis-skyhook (MCS-SH) mixed control algorithm was designed to improve the control effect of standard skyhook control for parameter-varying magneto-rheological semi-active suspension system. Firstly, the model of ideal SH control was established, which was taken as the reference model of MCS. Then control law of MCS-SH algorithm was provided in improving of the feedback control equation of MCS based on the feature of magneto-rheological damper (MRD). Finally, the simulation analysis of the MCS-SH algorithm was implemented. The results illustrate that the sprung mass acceleration and wheel dynamic load are decreased with MCS-SH control as the suspension parameters change. The improved skyhook semi-active control could enhance the ride comfort of vehicles, and be adapted to the variation of suspension parameters, which makes it of high practical utility.