基于模糊PID的电热地膜温度控制系统的设计

his paper designed the electric heating film temperature control system with PLC as control core. The temperature control system can realize manual/automatic control of the indoor temperature. At the same time, the user can through kingview software realize the real-time monitoring and control of the temperature. The temperature control system has the characteristics of big inertia, pure time-delay. So it is difficult to use mathematical method to establish the precise model and determine parameters. The application of the traditional PID control is difficult to achieve the temperature stability, accurate and rapid adjustment. In this paper, the Fuzzy - PID hybrid controller through the MATLAB simulation shows that using Fuzzy PID control is better than conventional PID control or Fuzzy control at the quickness, stability, adaptability and ability to resist disturbance. It improve the performance of the system.