中文摘要：

针对传统压电片作动器直接粘贴到被控结构表面时受到的各种限制，文中提出并设计制作一种新颖的弓型压电作动器。该作动器由一个弓型梁座和粘贴于其上的压电片构成，使用时将弓型梁座粘贴于被控结构上，压电片驱动弓型梁弯曲变形，进而对被控结构产生作动。随后将其应用在弹性梁振动主动控制中，以验证这种新型作动器的可行性和有效性。采用热弹性比拟方法建立带弓型压电作动器的悬臂梁振动主动控制系统的状态空间模型，采用LQR（1inear-quadmtic regulator）方法进行控制器设计。基于dSPACE硬件在线控制仿真系统，进行悬臂梁振动的主动控制实验，并对这种新型压电作动器与传统压电片作动器的振动控制效能进行实验对比。实验结果表明，这种弓型压电作动器具有良好的作动效能和安装方便灵活、可重复使用等优点。

英文摘要：

Aimed to improve the actuating efficiency and avoid installation limits of traditional PZT （piezoelectric lead zirconate titanate） patch actuators for smart structural vibration control, an arching PZT actuator （APA） is designed and manufactured. This new type of piezoelectric actuator is a flexible arching pedestal bonded with a PZT patch. Its configuration makes its installation more optional and being re-usable. In order to study the actuation property and the vibration control power of APA, an APA and a PZT patch actuator are applied for the active vibration control of two same flexible cantilever beams for a comparative study. Thermoelasticity analogy method is adopted to build the state-space model of the active vibration control systems, and the LQR（ linear-quadratic regulator） algorithm is used to design the control/er. Based on the dSPACE on-line simulation system, comparative experiments of the two active vibration control systems are implemented respectively. Test results demonstrate the vibration control efficiency of APA is comparatively satisfying.