注汽锅炉蒸汽干度的模糊前馈-反馈控制  

Fuzzy feedforward-feedback control of steam-injection boiler dryness fraction

作　　者：段黎明[1] 周艳君[2] 石红武 

机构地区：[1]重庆大学ICT研究中心,重庆400044 [2]重庆大学机械学院,重庆400044 [3]重庆新仪自控系统工程有限公司,重庆400700

出　　处：《仪器仪表学报》2006年第7期720-724,共5页Chinese Journal of Scientific Instrument

基　　金：重庆市科技计划(7703)资助项目

摘　　要：为了实现注汽锅炉蒸汽干度的高质量控制,设计了一个基于模糊逻辑的前馈-反馈干度控制系统。该系统采用基于Takagi-Sugeno(T-S)模糊模型的多步预测器对蒸汽干度进行预测,并将其预测输出作为系统反馈信号。来自水流量的前馈控制量与主回路控制量相乘,形成相乘型前馈-反馈控制以实现水火量的自动跟踪。同时在控制结构中引入非线性跟踪-微分器以增强系统的抗干扰能力。应用结果表明,该干度控制系统具有良好的控制效果。To implement the high-quality control of dryness fraction, a fuzzy feedforward-feedhack control system of dryness fraction was designed. A multi-step predictor based on Takagi-Sugeno fuzzy model is used to predict the dryness fraction of the boiler. The predictor output is used as feedback signal. By multiplying the output of the feedforward controller with that of the predictive controller, the multiplying type feedforward feedback control is realized so that the fuel rate follows feedwater rate automatically. To enhance the anti-interference capability of the control system, a nonlinear traeking-differentiator is employed. The result shows that this system has an excellent control effect.

关 键 词：注汽锅炉 干度 模糊预测控制 前馈-反馈控制 

分 类 号：TP273.4[自动化与计算机技术—检测技术与自动化装置] TP29[自动化与计算机技术—控制科学与工程]