温度控制继电反馈参数自整定技术研究  

Research on the Relay Feedback Parameter Self-tuning Technology for Temperature Control

作　　者：殷华文[1] 

机构地区：[1]南阳理工学院电子与电气工程学院,河南南阳473004

出　　处：《自动化仪表》2016年第3期23-26,共4页Process Automation Instrumentation

摘　　要：通过观测锅炉动态水温度对象在继电反馈下的极限环振荡,对PID参数自整定技术进行了研究。针对对象具有大惯性、大滞后和非线性的特点,在设置继电输出中心点和大幅值继电输出的前提下,采用带滞环的继电反馈振荡方法,研究了对象起振、正弦振荡曲线的在线辨识、非对称正弦振荡曲线处理、PID算法设计和参数整定等具体技术。采用PID+PWM算法进行参数自整定温度控制,实现超调量≤0.50 K、稳态误差≤0.12 K。Through observing the limit cycle oscillation of dynamic boiler water temperature object under relay feedback,the technology of PID parameter self-tuning is researched. In accordance with the characteristics of the objects,e. g.,large inertia,large time lag,and nonlinearity,under the premise of setting relay output central point and large amplitude relay output,by using the method of relay feedback oscillation with hysteresis,specific technologies of object vibration,online identification of sinusoidal oscillation curve,asymmetric sinusoidal oscillation curve processing,PID algorithm design,and parameter self-tuning,etc.,are researched. Using PID ＋ PWM algorithm,parameter self-tuning temperature control is conducted to implement overshoot ≤0. 50 K and steady error ≤0. 12 K。

关 键 词：温度对象 继电反馈 继电输出中心点 正弦振荡曲线辨识 PID控制 参数自整定 继电器 

分 类 号：TH7[机械工程—仪器科学与技术] TP272[机械工程—精密仪器及机械]