桁架结构振动主动控制的实验研究

Experimental Study of Active Control for a Trussed Structure

本文对桁架结构的动力特性和振动控制进行实验研究。实验中,结构的模态参数采用敲击法测量得出,采用压电杆作动器和加速度传感器用于结构的振动主动控制和信号测量,DSP控制卡用作信号处理系统。考虑到加速度传感器采集信号中的噪声影响,设计自适应滤波器以滤除采集信号中的高频噪声。实验结果显示,压电杆作动器能够较好地对结构的振动进行抑制。

An experimental study on dynamic characteristics and active control of a trussed structure was presented.The modal parameters of the structure were determined by means of the hammering method.A piezoelectric（PZT） hinge and an accelerometer were used as actuator and sensor for active control of the structure.A digital signal processing（DSP） board was used for signal processing.An adaptive filter was designed to eliminate the effect of high-frequency noise in the accelerometer.The experimental results indicate that the PZT actuator may effectively control the vibration of the structure.