主动隔振系统的辨识与自适应控制研究

Identification and Adaptive Control for Active Vibration Isolation System

对一个通用的单层隔振系统进行了基于最小二乘算法的系统辨识,对实测数据做功率谱分析得到了系统的频率响应,将辨识得到的模型求频响与之对比,两者的输入输出特性基本一致。主动控制采用基于最小均方算法的自适应滤波前馈控制器,使用辨识得到的模型进行了仿真研究,并使之处于双频扰力作用下,将仿真结果与采用PID控制的仿真结果进行了对比,发现采用该算法时的振动显著减小。

A common single-layer isolation system is identified based on least squares algorithm.For power spectrum analysis of the experimental data for getting the frequency response,it contrasts the frequency response of the model which is identified,both input and output characteristics are basically the same.Active control algorithm is based on LMS adaptive filter feedforward control.For simulation the system,the models of system are identified to add dual frequence interference in the system.Compared the simulation results with that of PID control simulation,the vibration is significantly reduced by using this algorithm.