电主轴系统在多种热源作用下产生的热变形已成为影响机床加工精度的主要因素.在对电主轴系统各个生热源分析、计算的基础上,建立电主轴系统的合理模型,把计算得到的生热和传热等参数以边界条件的形式施加到有限元模型上,得到主轴系统的温度场分布和最高转速时电主轴系统的瞬态分析,计算出主轴各部分温度随时间的变化,根据分析结果提出改进措施,为完善电主轴系统的结构设计提供理论依据.%To improve the dynamic characteristics and the coupling capability, a new predictive functional control algorithm is proposed for strong coupling multivariable systems with time-delay in industrial process, which combines predictive functional control and decoupling control. Firstly, a decoupling control algorithm is proposed, in which first-order models with time-delay are established by analyzing the amplitude-frequency and phase-frequency characteristics of the decoupled subject. Then a controller is designed for the single-variable subjects after decoupling based on the principles of predictive functional control. The simulation results show that this proposed algorithm has less online computation time, faster tracking, and higher control accuracy. It can provide a more effective control for complex multivariable systems.
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