基于模糊PID的溶解氧量控制策略的研究与设计  

Research and design on the dissolve oxygen control strategy based on the fuzzy PID

作　　者：刘春艳[1,2] 王世芳 王树东[1] 

机构地区：[1]兰州理工大学电气工程与信息工程学院,甘肃兰州730050 [2]青海大学水利电力学院,青海西宁810016 [3]青海科信电力咨询有限公司,青海西宁810001

出　　处：《青海大学学报（自然科学版）》2011年第2期19-24,共6页Journal of Qinghai University(Natural Science)

摘　　要：污水处理是一个复杂的生化反应过程,具有高度非线性、不稳定、建立数学模型困难等特点。尤其是曝气控制过程中溶解氧量(DO)参数的不确定性,采用传统PID控制策略难以实现优化。文中提出利用模糊控制技术,将专家经验应用于传统PID控制中,针对该系统设计模糊自适应PID控制器。通过合理的控制策略和规则,解决DO参数值波动的控制问题。还通过MATLAB软件仿真表明该控制策略的可行性和有效性,系统动、静态性能很好。Wastewater treatment is a complex biochemical reaction process and with some characteristics,such as highly nonlinear,unstable,difficult mathematical model establishment and especially the dissolve oxygen parameter uncertainty in aeration control process and difficulty to realize its optimization using the traditional PID control strategy.It is put forward to use the fuzzy control technology to put the expert experience into the traditional PID coutrol for the design of a fuzzy adaptive PID controller.Through the proper control strategy and rules,the control problem of dissolve oxygen parameter value fluetuation is solved and the MATLAB software simulation shows that the control strategy,system feasibility and effectiveness of the dynamic and static performance are very good.

关 键 词：氧化沟工艺 溶解氧量 模糊控制 PID控制 MATLAB仿真 

分 类 号：TP27[自动化与计算机技术—检测技术与自动化装置]