压电梁振动的多输入多输出主动控制

Multiple Input Multiple Output Active Vibration Control for Piezoelectric Beams

对表面上贴有多个用作驱动器和传感器的压电陶瓷片的“压电梁”结构，导出了从驱动器到传感器的频响函数公式，作为压电结构设计和振动控制的数学模型。提出了压电梁对缓变周期扰动振动环境的多输入多输出振动抑制方法。在两输入两输出压电梁的多谐波振动的抑振控制试验中，基于实时频响矩阵识别，实现上述控制算法。

A beam bonded with distributed piezoceramic wafers as actuators and sensors is referred to as a piezoelectric beam. The frequency response function matrix of the beam from the actuator driving voltages to the sensor ouput voltages is derived, which is used as the dynamic model of the piezoelectric beam in its active vibration control design. A multiple input and multiple output control approach is presented to suppress the vibration of the beam subjected to a slowly changing periodic dynamic turbulence. Based on the real time identification of the frequency response function matrix, the approach was realized in a test of a two input two output piezoelectric beam undergoing vibration with multiple harmonics and multiple modes, and the satisfactory results were obtained.