磁悬浮轴承多变量系统自抗扰解耦控制

摘要

在介绍径向四自由度磁轴承结构的基础上，建立了磁轴承多变量系统状态方程。基于自抗扰控制器原理，针对径向四自由度磁轴承系统，提出了多变量系统自抗扰解耦控制方案，构建了控制系统结构，并给出相关控制算法。根据实验样机参数，利用MATLAB软件环境，构建了解耦控制仿真系统，针对系统的阶跃响应、转子起浮等进行了仿真试验。研究结果表明：采用自抗扰控制策略设计的控制系统成功实现了多变量的解耦控制，具有精度高、响应速度快、超调量小等特点。%Based on introducing configuration of a radial 4 degrees of freedom active magnetic bearings , it establi-shes the state equations of the active magnetic bearing multivariable system .Focused on the 4 degrees of freedom radial active magnetic bearing system , it uses the principle of active disturbance rejection control ( ADRC) and puts forward the strategy of multivariable active disturbance rejection decoupling control .It builds the configura-tion of control system and gives the correlation control arithmetic .According to parameters of the experiment rig , it sets up the decoupling control simulation system with Matlab , and simulates the step response of system and the start up displacement curve of the rotor .The results show that the decoupling control system is succeed in decou-pling control of multivariable system , and it has high precision , high speed of response , and low overshoot .