磁流变车辆悬架系统的混沌振动分析

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摘要针对双自由度1/4车辆模型，采用磁流变阻尼器(MRD)的滞环阻尼力-速度(F-v)模型，建立磁流变(MR)悬架系统的动力学方程。分别研究了系统在简谐路面作用下随激励频率、激励幅值的分岔特性，并利用相平面图、Poincaré截面和功率谱等详细描述了通向混沌振动的路径。同时，结合MR悬架系统半主动控制原理，进一步探讨了悬架系统在低频段和中频段内对控制电流的敏感性。研究结果表明：MR悬架系统运动状态易受到路面激励频率和幅值的影响，但对MRD控制电流的变化并不敏感，可以通过完善控制器设计来有效抑制MR悬架系统混沌振动的发生。

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	黄苗玉
	王恩荣
	闵富红

关键词 ：磁流变阻尼器, 车辆悬架, 混沌振动, 半主动控制

Abstract：The dynamic equation of 2-DOF quarter-car magneto-rheological suspension is established from the hysteretic force-velocity (F-v) model of magneto-rheological damper. The bifurcation dynamics affected by frequency and amplitude of harmonic excitation, are deeply studied, through phase diagram, Poincaré map and power spectrum. Moreover, according to the principle of semi-active control, the sensitivity of control current is further investigated in the low-bandwidth and middle-bandwidth. The results show that the dynamic state of MR suspension system is easily affected by the road excitation frequency and amplitude, and less sensitive to the control current of MRD, which provides a useful theoretical guidance for consummating the synthesis of MR semi-active suspension system controller to effectively suppress its chaotic vibration.

Key words： magneto-rheological damper vehicle suspension chaotic vibration semi-active control

收稿日期: 2014-09-26 出版日期: 2015-12-25

引用本文:

黄苗玉，王恩荣，闵富红. 磁流变车辆悬架系统的混沌振动分析[J]. 振动与冲击, 2015, 34(24): 128-134.
HUANG Miao-yu, WANG En-rong, MIN Fu-hong. Chaotic vibration analysis of vehicle suspension with magneto-rheological damper. JOURNAL OF VIBRATION AND SHOCK, 2015, 34(24): 128-134.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2015/V34/I24/128

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