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该文采用逆系统理论与模型参考自适应理论结合的控制方法,对轴向磁轴承支承的转子系统这一非线性的控制对象进行建模及精确控制研究。在介绍轴向磁轴承的结构,推导出轴向悬浮力数学方程的基础上,对数学模型进行可逆性分析,得出了原系统的解析逆系统;将构造出来的逆与原系统串联复合成伪线性系统;采用模型参考自适应控制理论对伪线性系统进行了综合和仿真。仿真结果表明:这种控制策略能够实现轴向磁轴承的简单线性化,模型能按理想的指标运行,系统具有良好的动态和静态性能。
In this paper, a control method based on inverse system theory and model reference adaptive theory is used to study the modeling and precise control of a nonlinear magnetic-rotor supported rotor system. Based on the introduction of the structure of axial magnetic bearing and the derivation of mathematical equations of axial levitation force, the reversibility of the mathematical model is analyzed and the inverse system of the original system is obtained. The inverse of the constructed system is combined with the original system in series Pseudo-linear system. The pseudo-linear system is integrated and simulated by using model reference adaptive control theory. The simulation results show that this control strategy can realize the simple linearization of the axial magnetic bearing, the model can run according to the ideal index, and the system has good dynamic and static performance.