| 磁流变阻尼器的改进多项式模型及验证 |
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| 引用本文： | 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 |
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| 作者姓名： | 周铁明 陈恩伟 陆益民 刘正士 陈无畏 |
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| 作者单位： | 合肥工业大学机械与汽车工程学院，合肥 230009 |
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| 基金项目： | 国家自然科学基金资助(51279044);安徽省自然科学青年基金资助(11040606Q36);中央高校基本科研业务费专项资金资助(2011HGQC1035) |
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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。
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| 关 键 词： | 磁流变阻尼器 多项式模型 最小二乘法 参数辨识 |
| 收稿时间： | 2013-07-16 |
| 修稿时间： | 2013-11-27 |
Modified Polynomial Model of Magnetorheological Damper and Model Verification |
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| 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 |
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| Authors: | ZHOU Tieming CHEN Enwei LU Yimin LIU Zhengshi CHEN Wuwei |
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| Affiliation: | School of Mechanical and Auto Engineering, Hefei University of Technology, Hefei, 230009 |
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| 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. |
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| Keywords: | Magnetorheological DamperPolynomial ModelLeast Square MethodParameter identification |
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