• CN:11-2187/TH
  • ISSN:0577-6686

›› 2009, Vol. 45 ›› Issue (9): 41-45.

• 论文 • 上一篇    下一篇

自适应振动控制中的输出饱和抑制

张志谊;胡芳;王俊芳;华宏星   

  1. 上海交通大学机械系统与振动国家重点实验室;武汉理工大学材料科学与工程学院
  • 发布日期:2009-09-15

Suppression of Output Saturation in the Adaptive Vibration Control

ZHANG Zhiyi; HU Fang; WANG Junfang; HUA Hongxing   

  1. State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University School of Material Science and Engineering, Wuhan University of Technology
  • Published:2009-09-15

摘要: 针对结构振动的自适应控制,讨论控制器输出饱和的影响并给出相应的抑制方法。在跟踪滤波和滤波X LMS(FXLMS)方法的基础上,通过引入Sigmoid函数并进行自适应控制器权系数的约束优化来获得权系数的调整规律,使控制器输出快速脱离饱和区,而且被控对象的振动以更快速度衰减。通过数值仿真研究一个试验系统的自适应控制器的饱和非线性及其抑制效果,结果表明所提方法能够有效地抑制输出饱和的影响,显著改善自适应控制器的性能。

关键词: 滤波X LMS, 输出饱和, 振动控制, 自适应控制

Abstract: Output saturation of adaptive controllers and the resulting influence on the adaptive control of structural vibrations are discussed with the focus on saturation alleviation. On the basis of tracking filtering and the filtered-X LMS algorithm, a method for weight updating is obtained by utilizing the sigmoid function in the constrained optimization of controller parameters. The presented method can ensure a controller to fast escape saturation and reduce structural vibration to a lower level in a shorter time. Numerical simulation is conducted to investigate the influence and suppression of controller saturation. The results demonstrate the effectiveness of the proposed method in saturation alleviation and the performance improvement in adaptive vibration control.

Key words: Adaptive control, Filtered-X LMS, Output saturation, Vibration control

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