发酵过程中溶解氧智能控制系统的探究.pdfVIP

Proceedings of the 26th Chinese Control Conference July 26-31, 2007, Zhangji aj ie, Hunan, China 发酵过程中溶解氧智能控制系统的研究* 朱小六，蒋鼎国，张宇林，徐保国 南大学通信与控制工程学院，无锡 214 122 E-mail: zhuxiaol8008@126.com 摘 要：溶解氧(DO)是微生物发酵过程中重要参数之一，用常规的 PID 难以解决该参数非线性、大时滞的特性。设 计了一种基于动态惯性因子粒子群算法的智能PID 控制器，它能够根据发酵过程中DO 浓度变化来自适应的调整PID 的参数，在DO 控制中的应用，与常规的PID 控制相比，响应速度快，超调量小，提高了系统的稳定性，增 了产品 的得率。 关键词：溶解氧，PID，动态惯性因子，粒子群优化算法 Research on DO Intelligent Control System in Fermentation Zhu Xiaoliu, Jiang Dingguo, Zhang Yulin, Xu Baoguo School of Communication and Control Engineering, Southern Yangtze University, Wuxi 214122, P. R. China E-mail ：zhuxiaol8008@126.com Abstract: The parameter of Dissolved Oxygen is one of great importance in the process of microbe fermentation. A normal PID is difficult to solve the nonlinear, time-delay characteristics. A intelligent PID controller is designed based on dynamic inertia factor PSO, which can adaptively adj ust the parameters of PID and is used in the control of DO. Compared with nor- mal PID controller, the new controller is of small overshoot and quick response, improved stability of the system and in- crease the yield of products. Key Words: Dissolved qxygen, PID, Dynamical interact weight, PSO algorithm 1 引言(Introduction) 刻的个体极值记为p ibest ，全局极值记为gbest 。在每次 迭代中，粒子跟踪个体最优值、全局最优值和自己前 发酵是食品、医药等许多行业的一个关键生产过 一时刻的状态来调整当前时刻的位置和速度，迭代公 程，溶解氧又是微生物发酵过程中的至关重要的参 式如下： 数，对溶解氧的控制是对整个发酵过程进行监控的必 v (t + 1) = wv (t)