压电作动器在基于声辐射模态的ASAC中的应用

控制作动器的选取和设计是实现主动结构声学控制的关键一环。利用压电材料的逆压电效应,选择矩形压电片作为控制作动器应用于基于声辐射模态的主动结构声学控制中,提出了基于声辐射模态的压电作动器主动控制策略,并得到了最佳控制电压的获取方法。以简支板为例,通过压电作动器控制效果分析,揭示了压电作动器控制的内在规律;通过与单点力控制效果的比较分析,验证了压电作动器控制策略的优越性。

Application of piezoelectric actuators in ASAC based on radiation modes

To choose and design the actuators is an important step in implementing an ASAC. An active control strategy with the rectangle piezoelectric actuators is established by using the inverse piezoelectric reaction of the piezoelectric materials and the radiation modes theory. And the best control voltages upon the actuators are abtained. Taking the simple-supported plate as an example, the control rules of the piezoelectric actuators are revealed by analyzing the control effects. Comparing control effects of the piezoelectric actuators with that of the point force, the advantage of the active control strategy with the piezoelectric actuators is demonstrated.