基于模糊自适应PID控制的反应釜系统的设计与仿真

摘要

To address the problems like high energy consumption, unstable product quality and simple control system of the low grad synthetic scheelite equipment in China, the temperature mathematic model was estab-lished based on the process requirements of the alkali autoclave process for scheelite. The cascade control system was constructed by applying the reactor temperature and jacket temperature respectively as the major controlling variable and supplementary controlling variable. The automation of alkali autoclave process for scheelite was realized by developing the intellective control system based on single chip temperature control system using adaptive fuzzy adaptive controller to choose the optimal parameters. Simulation experiments show that fuzzy adaptive PID control system has characteristics of quick response and good fault tolerance. The ap-plication of the temperature control system of cascade control can overcome the lagging effect of reactor and achieve precisely control of temperature in reactor by ensuring the stability of product quality.%针对我国现有低品位白钨矿分解设备普遍存在能耗高、产品质量不稳定,以及控制系统简单等问题,根据白钨碱压煮的工艺要求,建立了反应釜温度控制数学模型;以釜内温度为主被控量、夹套温度为辅助被控量,构建了串级控制系统;采用模糊自适应方法选择最优PID参数,开发了基于单片机的温度智能控制系统,实现了白钨碱压煮工艺过程的自动化.通过仿真表明,模糊自适应PID控制系统具有误差小、响应速度快的特性;采用串级控制方法的温度控制系统可以克服反应釜系统的纯滞后现象,实现了反应釜内温度的精确控制,保证了钨碱压煮工艺产品质量的稳定.