Design of Control System Based on Temperature Control Test Cabin System Model

For High-Low temperature test system by air flow heat exchange, a mathematical model which can reflect the state of the system is established. The parameters of the model are identified by experimental data. In practice, it is found that the model parameters are easy to drift. In this paper, the integral separation and proportional-weakening control strategies are adopted to adjust the PID parameters of the control system. The model was implemented on the PLC hardware platform and verified on a set of high-low temperature test systems. The verification show that the model can effectively reflect the system status. After the tuning, the PID control can meet the performance requirements of the temperature control system.