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挠性体振动控制研究

【作者】 王小华

【导师】 胡维礼;

【作者基本信息】 南京理工大学 , 控制理论与控制工程, 2003, 硕士

【摘要】 本文是针对国家自然科学基金项目“空间挠性体的智能自主控制研究”中提出的任务展开工作,对压电智能结构的振动控制技术进行了理论与实验方面的研究。主要以一套LY12(硬铝)柔性臂振动系统为研究对象,利用压电陶瓷片的正逆压电效应,以欧拉梁模型为基础,建立系统机电耦合传感方程和致动方程。并用模态分析的方法,将系统的偏微分方程模型转化成了模态模型;研究了状态反馈和独立模态方法;进一步完善了软件界面以及软件功能;在实际系统中,应用状态反馈算法,有效抑制了悬臂梁在受到外界瞬时脉冲扰动和激振引起的一阶、二阶模态振动。

【Abstract】 Funded by the National Research Foundation and served as one item of the research of "Intelligent Self-Control of Flexible Space Structures", this paper investigated vibration suppression of flexible structures. Based on a duralumin flexible beam with piezoelectric films attached, distributed parameter modal described by partial difference equations is builded, and then turned into a set of two order systems with the method of modal analyse. State feedback control and independent modal control is investigated. And simulation of the closed-loop system with thest two methods is performed in MATLAB. Control software of the beam system is improved. In experiment, state feedback control is used and is verified by the well suppressed vibration of the flexible beam.

  • 【分类号】TP273.5
  • 【被引频次】2
  • 【下载频次】225
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