FXLMS algorithm based multi channel active vibration control of piezoelectric flexible beam

Abstract

Taking the piezoelectric flexible beam as the research object, this paper proposed a FXLMS algorithm based MIMO adaptive vibration control method to attenuate the oscillations of flexible structures at low frequency. By introducing the piezoelectric constitutive equations and analyzing the multi-channel adaptive filtered feedforward control algorithm and its FXLMS algorithm process, the model parameter identification strategy for the controlled structure as well as the controller design structure diagram are given in this paper. Structure modal characteristic analysis was done to determine the optimal configuration of piezoelectric sensors and actuators. Active vibration control experimental platform was established to verify the effectiveness of the FXLMS control scheme. The vibration control experiment was done after the control channel model was obtained. The experimental results show that the MIMO adaptive vibration controller proposed in this paper has a good control performance, with low order model and rapid convergence.