模糊PID控制在冷冻干燥机温度控制系统中的应用

摘要

Considering the greater time delay and time-variation characteristics of freeze dryer ’ s temperature control system , a genetic algorithm-based fuzzy-PID controller was designed and applied to the temperature control of the freeze dryer ’ s shelves .Simulation experiment shows that , this fuzzy-PID controller has fast re-sponse speed and better stability and anti-interference;and compared to the conventional PID algorithm , it can solve nonlinearity and time variation and greater time delay of the system .%针对冷冻干燥机温度控制系统的大滞后、时变特性，设计了一个遗传算法优化的模糊PID控制器，并将它应用于冷冻干燥机搁板的温度控制中。仿真实验结果表明：遗传算法优化的模糊PID控制器响应速度快，具有良好的稳定性和抗干扰性，相比于传统PID算法能够更好地解决系统的非线性、时变和大滞后问题。