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  

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

作　　者：吴克恭[1] 姜节胜[1] Janocha Hartmut 

机构地区：[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

出　　处：《航空学报》2003年第5期431-434,共4页Acta Aeronautica et Astronautica Sinica

基　　金：国家自然科学基金(10072050)资助项目

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。Having recognized the disadvantages of the earlier studies which mostly focused on the structural surface glued ceramics, the authors conducted the experiment of active vibration control of composite material beam with the embedded piezoceramics using on-line self identification and full state observer technique. With the help of embedded piezoelectric actuators and sensors, the dynamic state space model of the composite material beam is identified using the on-line model analysis method. Thereafter, the LQR controller with full state observer is developed to suppress the vibration of the structure. The experiment result shows that this method is effective and feasible in engineering practice. In the demonstrated experiment, the vibration can be reduced up to 20 dB.

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 

分 类 号：O328[理学—一般力学与力学基础] TB123[理学—力学]