机构地区: 西北工业大学力学与土木建筑学院振动工程研究所
出 处: 《航空学报》 2003年第5期431-434,共4页
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.