含橡胶轴承轴系振动传递主动控制研究

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振动与冲击 ›› 2014, Vol. 33 ›› Issue (20) : 63-69.

论文

含橡胶轴承轴系振动传递主动控制研究

胡芳1,2，张志谊1，吴天行1，华宏星1

作者信息 +

Active vibration transmissioncontrol of a shafting system with water lubricated rubber bearings

HU Fang1,2，ZHANG Zhi-yi1，WU Tian-xing1，HUA Hong-xing1

Author information +

文章历史 +

摘要

研究基于惯性式作动器的振动主动控制方法。通过简化轴系模型分析随转速变化的橡胶轴承支承特性导致轴系振动特性改变原因。提出控制模型在线辨识与周期振动抑制方法。用LMS辨识算法及子空间滤波方法获取轴系运行状态下控制通道的脉冲响应，滤除由转速调制所致周期干扰，用内嵌饱和抑制与干扰重构Filtered-x LMS算法构建由转速调制的周期干扰抑制方法。仿真与试验结果表明，经滤波的脉冲响应在线辨识模型更有效，且控制方法能抑制转速调制的周期干扰、减小弹性基础振动。

Abstract

Suppressing the vibration ofshafting bearings is an effective measure to reduce vibration transmission from the shaftingto its elastic support. This paper investigates active vibration transmission control of ashaftingsystem,which cosists of water-lubricated rubber bearings and a thrust bearing,and presents an activecontrol scenario,which uses inertial electromagnetic actuatorsto tranquilizethe thrust bearing. The active controlmethod employs an online identification and filtering algorithm to establish the control channel model influenced by the shaft-speed-dependent characteristicsof the rubber bearings. A simplified physical model is presented to explore the mechanism of the speed- dependent characteristics. The LMS-based adaptive identification algorithm and the subspace filtering algorithm are applied toderive for the control channel anFIR modelwithout noise contamination caused otherwise by the speed-modulated periodical disturbances.Transmission suppression is realized via the Filtered-x LMS algorithmenforced with two additional units fordisturbance reconstructionand saturation alleviation.The simulation and experimental results have demonstrated that the online identification of the FIR model is effective and the active control mthod is able to suppress the speed-modulated periodical vibration of the shafting bearing.

导出引用

胡芳;张志谊;吴天行;华宏星. 含橡胶轴承轴系振动传递主动控制研究[J]. 振动与冲击, 2014, 33(20): 63-69

HU Fang;ZHANG Zhi-yi;WU Tian-xing;HUA Hong-xing. Active vibration transmissioncontrol of a shafting system with water lubricated rubber bearings[J]. Journal of Vibration and Shock, 2014, 33(20): 63-69