非自衡化工生产过程的PID控制解析设计

Analytical design of PID controller for the integrating chemical process

摘要:

针对非自衡化工过程难以控制及所得控制器参数调节无规律可循的问题,为提高过程控制品质,本文通过设计跟踪给定值控制回路和抑制干扰控制回路来实现非自衡化工过程的控制,利用最优控制理论、Taylor近似,设计得到的跟踪给定值控制器和抑制干扰控制器其PID参数可解析给出,每个控制器只有唯一的调节参数且两个回路的参数调节相互独立,最后定性分析了闭环控制系统的稳定性,仿真结果表明基于该控制系统可有效实现非自衡化工过程的控制。

Abstract:

It is difficult to control the integrating chemical process, and in order to improve the stability of process and solve the problem of parameters adjusting of the controller. In the paper, a tracing setpoint controller and a load-rejection controller are designed to control the integrating chemical process, so the tracing setpoint control loop and load-rejection control loop can be adjusted independently. On the basis of optimal control theory and Taylor approximation, the tuning parameters of the resulted PID controllers can be given analytically,furthermore the stability analysis of the closed loop control system is also given, which shows that the designed system can track setpoint without error. At last, the application examples show that the proposed method has superiority over some existing methods, and it can be used to control integrating chemical process.