热交换系统二自由度PID控制

Two Degrees of Freedom PID Control of Heat Exchange System

为解决热交换系统的温度控制问题,采用二自由度PID(Proportional-Integral-Derivative)控制算法设计了温度控制器。该控制器的PID参数通过Ziegler-Nichols振荡法整定,二自由度化控制器参数根据经验规则进行调整。利用所设计的二自由度PID控制器和传统的PID控制器进行了多项仿真实验,包括目标跟踪、抗扰、鲁棒性和标称模型控制等。实验结果表明,二自由度PID控制器的目标跟踪速度优于传统PID,具有良好的鲁棒性,对标称模型的控制具有更小的上升时间和反冲。

In order to control the temperature in the heat exchange system,the two degrees of freedom PID（ Proportional-Integral-Derivative） control algorithm was used. The PID controller is synthesized by the ZieglerNichols oscillation method,and the coefficients of two degrees of freedom controller were adjusted according to the empirical formula. A series of simulation experiments were carried out with the reference of the traditional PID controller,including object tracking,anti-jamming,robustness testing and nominal model controlling. The two degrees of freedom controller showed good performance,object tracking（ better than the traditional one）,and robustness. In the nominal model control simulation experiment,the system with the two degrees of freedom controller worked with a less rise time and a less recoil than which with the traditional controller.