论文部分内容阅读
利用压电片的正逆压电效应提出了时分复用模式的压电自感知执行器,应用于悬臂梁的振动主动控制中。从机电变换双向可逆效应角度阐述了时分复用压电自感知执行器的工作原理。当压电片的传感功能与执行功能快速切换时,对于模态频率较低的结构,相当于传感器和执行器是同时工作的。时分复用自感知执行器实现的关键是开关电路设计和时序控制。本文重点讨论了开关电路的设计方法,指出了开关应具有耐高压和高速等特点。以一阶模态频率为14.7Hz的铜悬臂梁为实验对象进行了实验研究,结果证明时分复用自感知执行器与独立的传感器和执行器具有基本相同的传感和执行效果。
The piezoelectric self-sensing actuator with time-division multiplexing mode is proposed by using the positive and negative piezoelectric effect of the piezoelectric film, which is applied to the active vibration control of the cantilever beam. From the view of electromechanical transformation bidirectional reversible effect, the working principle of time division multiplexing piezoelectric self-sensing actuator is expounded. When the sensing function of the piezoelectric film and the executive function to switch quickly, for the lower modal frequency structure, equivalent to the sensor and actuator are working simultaneously. Time-division multiplexing self-sensing actuator to achieve the key switch circuit design and timing control. This article focuses on the design of switching circuits, pointed out that the switch should be resistant to high voltage and high speed and so on. Experimental results show that the time-multiplexed self-sensing actuator has the same sensing and executing effect as the independent sensor and actuator.