磁流变阻尼器驱动的智能车辆悬挂控制及实验

Control and Experimental Validation of Intelligent Vehicle Suspension With Magneto-rheological Dampers

针对由新型的磁流变阻尼器驱动的智能车辆悬挂设计要求,提出了一种基于天棚阻尼律实现不对称阻尼特性的半主动控制方案,能有效地抑制驱动电流的“开-关”冲击特性和磁流变阻尼器滞环特性产生的不良影响.将该控制器与四分之一车辆模型相结合,在变幅度谐波、平滑脉冲和随机信号激励下,对该半主动控制器的性能进行了仿真分析,并通过设计的硬件在环测试系统进行了系统的实验研究.结果验证了所提出的智能车辆悬挂设计能理想地实现车辆驾乘舒适性、与路面可靠接触、悬挂空间等多目标悬挂性能,以及对簧载质量变化的鲁棒特性.

A modified skyhook-based semi-active controller is proposed for implementing an asymmetric control suspension design with symmetric MR dampers. The controller has potential to effectively minimize the switching and hysteretic effects from the semi-active control and the MR-damper. The proposed controller is constructed with the quarter-vehicle MR-suspensian model, and its relative response characteristics are thus evaluated in terms of defined performance measures under varying amplitude harmonic, rounded pulse and random excitations. The sensitivity of the semi-active suspension performance to variations in controller parameters is further evaluated. The results illustrate that the proposed skyhook-based asymmetric semi-active MR-suspensian has superior robustness on the controller parameter variations, and can achieve desirable multi-body suspension performances.