LMS类算法在磁轴承滤波补偿中的应用分析

中国机械工程 ›› 2011, Vol. 22 ›› Issue (1): 9-14.

LMS类算法在磁轴承滤波补偿中的应用分析

高辉;徐龙祥

南京航空航天大学，南京，210016

出版日期:2011-01-10 发布日期:2011-01-17
基金资助:
国家高技术研究发展计划(863计划)资助项目(2006AA05Z205)；江苏省自然科学基金资助项目(BK2007590)；航空科学基金资助项目(2008ZB52018)
National High-tech R&D Program of China (863 Program) （No. 2006AA05Z205）;

Jiangsu Provincial Natural Science Foundation of China（No. BK2007590）;
Aviation Science Foundation of China（No. 2008ZB52018）

Analysis of Kinds of LMS Algorithms in Application of Filtering Compensation for Magnetic Bearings

Gao Hui;Xu Longxiang

Nanjing University of Aeronautics and Astronautics, Nanjing, 210016

Online:2011-01-10 Published:2011-01-17
Supported by:

National High-tech R&D Program of China (863 Program) （No. 2006AA05Z205）;

Jiangsu Provincial Natural Science Foundation of China（No. BK2007590）;
Aviation Science Foundation of China（No. 2008ZB52018）

摘要/Abstract

摘要：

主动磁悬浮轴承(AMB)系统中存在与转子同频的时变不平衡干扰信号，此信号会影响系统的控制效果。为了滤除这些不平衡信号，通过分析几类最小均方（LMS）误差算法，得出一种相对合适的滤波算法。根据AMB系统中干扰信号的幅值以及频率实时变化情况，对原算法进行了改进，并比较了改进算法与原变步长算法对时变信号的滤波效果。仿真与实验结果显示，改进算法对时变的幅值较小信号具有更好的跟随期望信号能力及收敛能力，为主动磁悬浮轴承系统的实时滤波补偿提供方便。

关键词:

主动磁悬浮轴承(AMB), 频率不等, 变步长LMS算法, 频率时变性, 自适应滤波

Abstract:

The time-variable unbalance interference signals exist synchronous with rotor rotational speed in active magnetic bearings system, which will affect the control effects of the system. To filter the unbalance signals, one kind of relatively suitable filter algorithm was proposed through analyzing some kinds of least mean square (LMS) algorithms. According to the real-time variation of the amplitudes and frequency of the interference signals in AMB system, the original LMS algorithm proposed was improved, and the filter effects on time-variable signals about the original and the improved algorithms were compared. The simulation and experimental results show that the new improved LMS algorithm has better ability of following the anticipant signals and convergence to time-variable and small amplitude signals. It can provide convenience to real-time filter compensation for the AMB system. 

Key words:

active magnetic bearing (AMB), frequency mismatch, variable step-size LMS algorithm, frequency time-varying, adaptive filtering

中图分类号:



高辉, 徐龙祥.

LMS类算法在磁轴承滤波补偿中的应用分析

[J]. 中国机械工程, 2011, 22(1): 9-14.

GAO Hui, XU Long-Xiang. Analysis of Kinds of LMS Algorithms in Application of Filtering Compensation for Magnetic Bearings[J]. China Mechanical Engineering, 2011, 22(1): 9-14.

参考文献

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