移动质量激励悬臂梁振动主动控制系统

Active vibration control system with cantilever beam under moving mass

利用压电材料的正逆压电效应,实现了移动质量激励悬臂梁振动主动控制;建立了压电元传感方程和作动方程,进一步将其转化为状态空间模型中的状态方程和输出方程;设计了基于线性二次型最优控制(LQR)策略的振动主动控制器,以TMS320VC33 DSP芯片为核心组建了相应的硬件电路。实验结果表明:采用压电自感作动器可很好地抑制移动质量激励引起的悬臂梁振动。

The dynamic modeling and vibration active control research with self-sensing actuators for a cantilever beam under a moving mass is introduced. The sensing equation and actuating equation are obtained based on the Euler-Bernoulli beam theory by including the dynamic effect of a moving mass. Accordingly ,the state equation and output equation in state-space model for the system are obtained. The vibration active controller based on the linear quadratic regulator is designed, and the hardware circuit based on the TMS320VC33 digital signal processor is made. Experimental results show that the vibration of a cantilever beam under a moving mass is restrained well by the piezoelectric self-sensing actuator.