【作者】 李万东； 刘载文； 王小艺； 许继平； 齐杰； 连晓峰；

【Author】 Li Wandong Liu Zaiwen Wang Xiaoyi Xu Jiping Qi Jie Lian Xiaofeng (School of Information Engineering Beijing Technology and Business University Beijing 100037 China)

【机构】 北京工商大学信息工程学院；

【摘要】 针对污水处理系统中溶解氧控制存在大滞后、大惯性和时变等特点,在分析常规PID控制和模糊控制不足的基础上,提出了一种模糊Smith-PID复合控制模型。该模型集成了模糊控制器鲁棒性高、Smith预估器的时滞补偿以及PID控制精度高的优点。经过仿真实验,结果表明该控制模型在模型匹配和失配的情况下都具有较好的鲁棒性和稳定性,为解决大滞后、大惯性时变系统提供了一种有效的途径。更多还原

【Abstract】 Considering the characteristics of the time-delay,inertia and time-varying of the control of DO in the wastewater treatment,a fuzzy Smith-PID control model is proposed based on the analysis of the inadequacy existed in the regular PID and Fuzzy Control,which integrates the advantages of the high robustness of the Fuzzy controller,the compensation of the time delay problem of Smith Estimation Machine and the high accuracy of PID controller.Through the simulation experiment,the result shows that this complex strategy has good robustness and stability in both of the model matching and mismatching situation,and provides an effective way to solve the problem of the time-delay,inertia and time-varying system.更多还原