多变量解耦控制的工业过程运行层次控制方法

Hierarchical control approach for industrial process operation based on multivariable decoupling control

基于多变量解耦控制技术,提出了一种工业过程运行的层次控制方法,用于实现表征过程整体运行性能的工艺指标.底层回路控制系统采用多回路PI/PID控制技术进行设计,用于将关键工艺参数控制在给定的工作点.针对由被控过程和底层回路控制系统构成的广义对象,采用扩展的单位反馈解耦方法设计上层回路设定控制器.该回路设定控制器能够克服系统具有的多变量耦合和不确定干扰影响,根据期望的工艺指标,对底层控制器的设定值进行在线调整.磨矿过程运行控制系统设计实例验证了所提方法的有效性.

A hierarchical control approach for industrial process operation is proposed to achieve the desired technical indices（TIs） by using the extended multivariable decoupling control technique.The lower-level loop control system de-signed by the multi-loop PI/PID control technique is responsible for forcing the key process variables that closely relate to the TIs to track the given setpoints.By using the extended decoupling control method within a unity feedback structure,we develop a higher-level setting controller for the generalized plant consisting of the controlled process and the lower-level control system.To achieve the desired TIs,this setting controller automatically adjusts the setpoints for the lower-level controllers in response to process uncertainties and disturbances with good decoupling performance.An application to the grinding process is presented to demonstrate the proposed control approach.