基于自适应滤波前馈控制的结构振动抑制研究

摘要

Using adaptive filter feedforward method to control the vibration of intelligent piezoelectric structure cantilever beam. The commonly used adaptive LMS algorithm and its improved form NLMS algorithm were studied and the performances of the two algorithms were compared. Theoretical analysis and simulation results show that adaptive filter feedforward control can effectively suppress the vibration of the beam and the feedforward control based on NLMS algorithm has faster response speed and smaller steady - state error than based on LMS algorithm.%采用自适应滤波前馈方法对压电智能结构悬臂梁进行振动控制.分别研究了常用LMS自适应算法及其改进型NLMS算法在振动主动控制中的应用,并对两种算法的性能进行了比较.理论分析和仿真结果表明,自适应滤波前馈控制能够有效的控制悬臂梁的振动,基于NLMS算法比基于LMS算法的前馈控制具有更快的响应速度和更小的稳态误差.