制粒机模糊解耦控制系统设计

Design of the granulating control system with fuzzy decoupling technique

制粒过程属于多变量、强耦合、非线性和大时滞系统,无法确立其精确的数学模型,因此常规解耦控制无法满足系统的要求.为了解决在饲料生产制粒过程中出现的堵塞、打滑和停机问题,我们根据模糊控制不依赖于对象模型的特性,采用模糊解耦方法设计主机电流和调质温度的模糊控制规则,实现主机电流和调质温度的相互去耦,并且采用以西门子S7-300 PLC为核心,配合采用西门子WinCC组态软件,设计并实现制粒机模糊控制系统.实验结果表明,该系统稳定高效、可靠性高.

Because of the granulating system＇ s mufti-variable, strong coupling, nonlinear and great timedelay, we are unable to establish its accurate mathematical model, so traditional conventional decoupling control system can not meet the requirements. In order to solve the problems of clogging, slipping and stop in the granulating course of feed production, according to its properties that don＇ t rely on the object model, we design the electric and temperature fuzzy control rule based on the fuzzy decoupling, which can solve the deeoupling between the electric and the quenching-tempering temperature. The fuzzy control system is designed and achieved by Siemens S7-300 PLC, combining with the configuration software of Siemens WinCC software. The experiment results indicate that the stability and reliability of the system is good.