航空学报 > 2003, Vol. 24 Issue (5): 431-434

基于在线识别与全维状态观测技术的埋入压电片复合梁的振动主动控制研究

吴克恭1, 姜节胜1, Janocha Hartmut2   

  1. 1. 西北工业大学振动工程研究所, 陕西西安?? 710072;2. 德国萨尔大学自动化过程实验室, 萨尔州德国?? 66123
  • 收稿日期:2003-06-02 修回日期:2003-07-15 出版日期:2003-10-25 发布日期:2003-10-25

Active Vibration Control of Composite Material Beam with Piezoceramics Embedded Using on-Line Self Identification and Full State Observer Technique

WU Ke-gong1, JIANG Jie-sheng1, Janocha Hartmut2   

  1. 1. Institute of Vibration Engineering; Northwestern Polytechnical University; Xi'an 710072; China;2. Laboratory for Process Automation; Saarland University; 66123 Saarbrucken; Germany
  • Received:2003-06-02 Revised:2003-07-15 Online:2003-10-25 Published:2003-10-25

摘要: 介绍利用埋入复合材料梁的压电传感器和驱动器对其振动进行主动控制的实验研究及其结果。利用埋入的压电传感器和驱动器对其进行模型识别而得出结构的动力学模型, 再将该模型用于控制器的设计,其优点是当结构本身或者约束、环境等发生变化后, 可对结构的模型重新进行在线识别, 及时更新控制参数,避免控制失效, 而且不需要事先知道结构的其他属性。应用最优控制理论的全维状态观测器技术, 结合所选取的压电传感器和作动器识别的结构动力学模型, 可以设计出其最优控制器。实验表明, 传感器信号的频谱峰值最大可以被有效地降低20dB 左右。

关键词: 埋入压电材料, 复合梁, 振动主动控制, 在线识别, 全维状态观测器, 最优控制, 实验

Abstract: Having r ecognized the disadvantages of the earlier studies w hich mostly focused on the structur al surfaceg lued ceramics, the authors conducted the ex periment of active vibr ation control of composite material beam w ith theembedded piezoceramics using self identification and full st ate observer technique. With the help of embedded piezoelectr ic actuators and sensors, t he dynamic state space model of the composite mater ial beam is identified using theon-line model analysis method. Thereafter, the LQR controller wit h full state observer is dev elo ped to suppress thev ibration of the structure. The exper iment r esult shows that this metho d is effective and feasible in engineer ing pr actice. I n the demonstrated experiment, the vibration can be r educed up to 20 dB.

Key words: embedded piezoceramics, composite structure, active vibration control, self identification, full state observer, optimal control, experiment

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