摘要
针对序批式活性污泥法(SBR,Sequencing Batch Reactor)污水处理过程具有的非线性、时变、强耦合等特性,并考虑污水处理过程控制存在入水水质流量等干扰量,进一步加大控制难度等问题,本文提出1种扰动观测器与模糊PID结合的污水处理控制方法。首先分析扰动观测器结构特点以及核心部分低通滤波器的选择,设计扰动观测器对控制过程常见干扰量进行预测,并根据预测扰动信号在控制系统输入端进行有效补偿,达到抵消干扰的效果:同时在此基础上结合模糊PID控制方法,自适应整定PID控制器参数,实现溶解氧DO的优化控制。最后建立仿真模型进行实验,并与常规PID控制和模糊PID控制效果进行对比,结果表明该组合控制方法能有效克服干扰,控制精度较高,具有较强的适应性和鲁棒性。
According to characteristics of nonlinear, time-varying, strong coupling in sequencing batch activated sludge wastewater treatment process, and considering that sewage treatment process control is susceptible to process disturbance like water quality parameters which causes the problems like increasing control difficulties, the disturbance observer combined with fuzzy PID control method is proposed for sewage treatment. Firstly, through analyzing the structural characteristics of the disturbance observer and design of disturbance observer that predict the control process interferences, an effective compensation for interfere can be achieved by making effective compensation at input of the control system. On this basis, the fuzzy PID control method that adjusts PID controller parameters adaptively is added to achieve optimal control of dissolved oxygen DO. Based on the result of simulation and compared with conventional PID control and fuzzy PID control method, verified that the control method can effectively overcome the interference, and has strong adaptability and robustness.
出处
《计算机与应用化学》
CAS
CSCD
北大核心
2013年第7期748-752,共5页
Computers and Applied Chemistry
基金
北京市自然科学基金项目(4112017)
北京市教委专项课题(PXM2013_014213_000044)
关键词
污水处理溶解氧
扰动观测器
模糊PID控制
sewage treatment
dissolved oxygen
disturbance observer
fuzzy PID control
