基于自适应滤波器的功率谱复现算法的研究

Research on Replication Algorithm for Power Spectral Density Based on Adaptive Filter

针对振动模拟试验过程中频响函数发生改变的情况,提出了在线修正频响函数的方法——基于自适应滤波器的系统频响函数估计,并以单自由度液压振动系统为典型被控对象,建立了单自由度液压振动的随机振动控制系统,并进行了功率谱复现算法的仿真。仿真结果表明该方法是适用的。

A method that could correct the frequency response function on line was proposed aiming at the frequency response function changing of the shaking table in the test. The method is based on the frequency response function estimation of adaptive filter. Single freedom hydraulic shaking control system was set up according to single freedom hydraulic shaking system, and the simulation of replication algorithm for power spectral density was carried out. The simulation result shows that this method is suitable.