最优控制理论在磁轴承控制系统中的应用研究

摘要

建立了径向四自由度磁轴承系统状态方程,介绍了采用最优控制理论中线性二次型方法设计磁轴承集中和分布参数控制器的方法和步骤,并用MATLAB语言进行了仿真比较.仿真和实验结果表明:磁轴承转子在60000rpm以下运行,基于最优状态反馈控制理论设计的控制器,忽略各自由度之间的耦合,用分散控制策略设计的磁轴承控制系统,基本满足磁轴承性能要求.%A state equation for a radical 4-degree-of-fieedom active magnetic bearing is built, and the approach on how to use linear quadratic method of optimal control theory to design a centralized and decentralized parameters control system is introduced Simulations have conducted within MATLAB. The results of simulations and experiments show that decentralized controllers designed from optimal state feedback theory at the speed of 60 000rpm meet the requirement of the active magnetic bearing system.