压电自感知柔性悬臂梁振动控制系统研究

Study on Flexible Cantilever Beam Vibration Control System Based on Piezoelectric Self-sensing Actuator

将压电悬臂梁系统离散化的状态空间方程作为预测模型,设计了预测函数控制器。采用电桥电路法分离出压电自感知执行器的感知信号,经过预测函数控制器处理后输出的控制信号作用于自感知执行器,产生相应的执行力来抑制悬臂梁的振动,从而达到振动控制的目的。仿真结果表明,所设计的振动控制系统对柔性悬臂梁振动抑制是非常有效的。

Regarding the discrete state-space equation as prediction model, the paper designs the predictive functional controller. The sense signal of piezoelectric self-sensing actuator is separated by the bridge circuit. After processing the sense signal with the predictive functional controller,the control signal is outputted to control piezoelectric self-sensing actuator. The stress is produced from the self-sensing actuator to control the flexible cantilever beam vibration. The simulation results show the designed system is very efficient for vibration suppression.