磁流变阻尼器的改进多项式模型及验证

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (7) : 221-226.

论文

磁流变阻尼器的改进多项式模型及验证

周铁明，陈恩伟，陆益民，刘正士,陈无畏

作者信息 +

Modified Polynomial Model of Magnetorheological Damper and Model Verification

ZHOU Tieming, CHEN Enwei，LU Yimin, LIU Zhengshi, CHEN Wuwei

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摘要

为更好地将磁流变阻尼器应用于磁流变阻尼器耦合系统的振动半主动控制，需建立较为精确的磁流变阻尼器动力学模型。已有的多项式模型对磁流变阻尼器的阻尼力-速度曲线拟合精度较高，但高次多项式拟合易出现Runge现象，导致拟合曲线的两端出现剧烈地振荡。为消除Runge现象，本文提出分段3次多项式模型并采用最小二乘法对其进行参数辨识。与试验数据相比，分段3次多项式模型能够较好地拟合磁流变阻尼器的阻尼力-速度曲线，而且消除了Runge现象。

Abstract

In order to better use the magnetorheological damper in the semi-active vibration control of magnetorheological damper coupling system, an accurate dynamic model of magnetorheological damper need to be established. Existing polynomial model of magnetorheological damper can fit the damping force-velocity curve accurately, but high-order polynomial fitting will lead to Runge phenomenon and violently oscillation at both ends of the fitting curve. To eliminate the Runge phenomenon, a piecewise cubic polynomial model is proposed in this paper and its parameters are identified by least square method. Compared with the experimental data, the piecewise cubic polynomial model can fit the damping force-velocity moer accurately and eliminate the Runge phenomenon.

导出引用

周铁明;陈恩伟;陆益民;刘正士;陈无畏. 磁流变阻尼器的改进多项式模型及验证[J]. 振动与冲击, 2014, 33(7): 221-226

ZHOU Tieming;CHEN Enwei;LU Yimin;LIU Zhengshi;CHEN Wuwei. Modified Polynomial Model of Magnetorheological Damper and Model Verification[J]. Journal of Vibration and Shock, 2014, 33(7): 221-226