一种磁流变阻尼器机械滞后模型建立与实验验证

Establishment and Experimental Verification of a Mechanical Hysteresis Model of Magnetorheological Dampers

磁流变阻尼器是半主动控制系统的核心部件,其强非线性导致其精确数学模型的建立十分困难。为提高模型对磁流变阻尼器的动态特性的描述精度,以某驾驶室悬置系统用磁流变阻尼器为研究对象,研究磁流变阻尼器在稳态输入下的响应,基于简化后的双曲正切模型提出一种机械滞后动态模型,分析滞后产生的原因,并根据描述精度对各模型进行评价。结果表明:机械滞后模型能够很好描述磁流变阻尼器阻尼力的突变现象,且具有较高的精度。

Magnetorheological damper is the core component of semi-active control system.Its strong nonlinearity makes it difficult to establish an accurate mathematical model.In order to improve the description accuracy of the model for the dynamic characteristics of MR dampers,the response of the MR dampers to steady-state input is studied for a cab mounting system.Based on the simplified hyperbolic tangent model,a mechanical hysteresis dynamic model is proposed.The causes of hysteresis are analyzed.And according to the description accuracy,several different models are evaluated.The results show that the mechanical hysteresis model can well describe the catastrophic phenomenon of damping force and has a high description accuracy.