基于自适应模糊PID的中药提取温度控制  

Temperature Control System of Distilling for Chinese Traditional Medicine Based on Adaptive Fuzzy-PID

作　　者：程跃[1] 程文明[1] 郑严[1] 

机构地区：[1]西南交通大学机械工程研究所,四川成都610031

出　　处：《控制工程》2009年第5期527-530,共4页Control Engineering of China

基　　金：四川省科技攻关基金资助项目(2006Z08-037)

摘　　要：以某制药厂中药提取系统为研究对象,分析中药提取工段的工艺设备和传热过程,建立简化模型。针对提取工段温度控制非线性、时变性、纯滞后的特点,设计自适应模糊PID控制器,并进行了仿真研究。仿真结果表明采用参数自整定模糊PID控制,系统调节时间短,响应速度快,具有较好的鲁棒稳定性。利用仿真得出的模糊控制参数表于某中药厂提取温控系统中进行在线PID整定,应用表明,使用此控制方法可有效减少温浸动态提取中的温度波动,达到良好的提取效果。Focused on Chinese medicine extraction system in a pharmaceutical factory, the processing facilities and heat-transfer process of Chinese medicine extraction are analyzed, and the simplified model is set up. Considering the characteristics of nonlinearity, time-varying and pure time-delay in temperature control of distilling procedure, a fuzzy self-tuning PID controller is designed and simulations are performed. The simulation results show that the system put up synthetic performance, such as less modulation time, quicker responses, better robustness constraints. Making use of fuzzy control parameter list resulted from simulation to the online PID adaptation in a pharmaceutical factory, it can decrease fluctuation in the distill temperature and achieve a better extraction results.

关 键 词：中药提取 模糊PID控制 参数整定 温度控制 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]