基于LSSVM逆系统在污水处理系统DO控制中的研究  

Research on Sewage Treatment Based on LS_SVM

作　　者：张世峰[1] 杨成[1] 李晓明[1] 

机构地区：[1]安徽工业大学电气信息学院,安徽马鞍山243002

出　　处：《工业控制计算机》2013年第4期66-67,89,共3页Industrial Control Computer

摘　　要：针对污水处理控制系统的非线性及时变等特点,在分析常规PID控制和模糊控制不足的基础上,以溶解氧DO为控制对象,提出一种由LS-SVM的逆模型与PID结合的复合控制系统,由LS-SVM辨识非线性系统的逆模型作为前馈控制器,形成直接逆控制。同时,由PID控制器构成反馈控制,克服直接逆控制鲁棒性不强的缺陷。仿真研究结果表明LS-SVM的逆模型辨识能力强,具有更好的抗干扰能力和鲁棒性。Aiming at the difficulties in the process of sewage treatment,such as non-linearity,time-varying that it is difficult to establish an accurate model.Based on dissolved oxygen（DO） as a control object,a com pound control strategy combing LS-SVM inverse system with PID controller is proposed.LS-SVM is used to identify the inverse model of non linear system,and this inverse model is used as feed-forward controller to design direct inverse control Moreover,PID controller is used to realize feed-back control which could overcome the limits of direct inverse control in performance and robustness.

关 键 词：逆模型辨识 最小二乘支持向量机 逆控制 

分 类 号：TP273.4[自动化与计算机技术—检测技术与自动化装置]