采用压电叠层作动器的弹性梁振动主动控制实验研究简

 结构响应主动控制系统中常用的惯性作动器由于附加质量大、工作频带窄和响应速度慢等缺点，降低了控制系统的性能。压电作动器具有质量轻、工作频带宽和响应速度快等优点，作为高效执行元件能有效地提高控制系统的性能。本文采用压电叠层作动器驱动自由-自由弹性梁模型，以观测点的加速度响应为控制目标，采用频域谐波稳态控制策略进行了自由梁结构谐波振动响应主动控制实验研究。实验结果表明，本文建立的采用压电叠层作动器的结构响应主动控制系统能有效地控制弹性梁结构的振动水平，并具有快速跟踪外激励变化的自适应控制能力。

Experimental Investigation on Active Vibration Control of Elastic Beam by Using Piezoelectric Stack Actuator

The inertial actuator is often used in the active control system of structural response. Due to its shortcomings such as heavy weight, narrow band of working frequency and slow response speed, it hampers the performance of the control system. The piezoelectric actuator has the advantages of lighter weight, wider band of working frequency and faster response speed and can effectively improve the performance of the control system as an efficient actuator. In this paper, an experimental investigation on the active vibration control of a free-free elastic beam structure is conducted by using a piezoelectric stack actuator, taking the acceleration response at the observed point as the control objective and using the harmonic steady control strategy in the frequency domain. The experimental results demonstrate that the active vibration control system established in this paper can effectively control the vibration level of an elastic beam structure and has the adaptive control ability to fast track changes of external excitation.