奶粉喷雾干燥模糊控制器的设计与仿真

Fuzzy controller design and simulate of milk powder spray drying

通过对喷粉干燥工艺过程的分析,针对传统的奶粉干燥控制系统存在的问题,提出以排风温度为主变量对蒸汽阀门进行粗调,以进风温度为次变量对蒸汽阀门进行微调的双闭环温度控制系方案。将模糊智能算法与传统PID控制结合起来作为主控制器,代替传统滞后补偿smith PID控制算法,建立了系统的仿真模型,通过MATLAB仿真实验证明了此系统具有良好的静动态性能。

In order to solve the problems existing in the traditional milk powder drying control system, this paper ana- lyzed the spray-drying process of milk powered and determined a new control method. Exhaust temperature as the main controlled variable to regulate the steam valve opening coarsely- inlet air temperature as the deputy variable to regulate the steam valve opening subtly in this control method. Main controller controller using fuzzy PID controller, and deputy controller using conventional PID control, simulation model of the system is built through the MATLAB and simulation experiments oroved that this system has good static and dynamic performance.