基于规则自寻优的过热汽温模糊控制  

Fuzzy Control of Superheated Steam Temperature Based on Rules Self-optimizing

作　　者：陈立军[1] 赵丽丽[1] 周正兴[1] 

机构地区：[1]东北电力大学自动化工程学院,吉林吉林132012

出　　处：《化工自动化及仪表》2010年第1期5-7,15,共4页Control and Instruments in Chemical Industry

基　　金：国家重点基础研究发展规划基金资助项目(2007CB206904);中国华能集团公司科学技术项目(HNKJ08-H32)

摘　　要：针对过热汽温大惯性、大延迟的动态特性及在电厂单元机组中的控制难点,根据规则自调整模糊控制算法,同时考虑误差和误差变化率对模糊控制的影响,采用全论域自修正因子函数实现了改进的模糊PID复合控制。同时在误差较小时设置阈值细调自修正因子,大大增加了系统的稳定性。仿真结果验证了该控制方法的有效性,对过热汽温的控制有一定的指导意义。Aimed at the dynamic characteristics of large inertial and large time-delay of superheated steam temperature system,a fuzzy control algorithm based on rule self-adjust was proposed.Based on rules self-adjusting fuzzy control algorithm and considering error and error rate of change,an improved Fuzzy-PID compound controller was realized which used whole domain of self-correction factor function.In addition,the algorithm set a threshold to finely adjust the self correct factor when the error was smaller and greatly increased the stability of the system.A simulation study of the main steam temperature control system shows that the algorithm has better self-adaptive ability and effectiveness.

关 键 词：过热汽温控制 模糊控制 修正因子 仿真 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]