【正文】 can’t match. In this paper， two 50t/h coalfired boilers’ burning control system was studied as its thesis， the primary PID controller was improved as its purpose， and fuzzy control theory developed rapidly at Present was applied as its means. The design scheme is that controlling transducers change rotate speed of supplying coal electromotor， fan， and blower using 8051 microcontroller. It realized puter control of burning process. This system finished supervisory control of boiler burning， sampled signals through sensor and calculated the signals whether reached the best content of oxygen and the best windcoal ratio. Using it controls the quantity of coal， entering wind and sending wing for reaching the best thermal efficiency of burning and improving economy benefit of boiler running. Simulation of boiler burning control system was also performed to study the controller’s selfadaptive fuzzy control by MATLAB. Aiming at the nonlinear object of boiler with instability parameter and difficult building math model， using traditional PID controller can’t reach the best effect. Combining fuzzy control theory and PID control， an adaptive controller to control boiler is proposed in this paper. And the capability of the selfadaptive fuzzy controller was studied using MATLAB simulation. Simulation result shows FuzzyPID is better than III PID controller. FuzzyPID has many characteristics， such as small exceeded value， short transition， better stability and strong adaptability etc， and can reach anticipative control effect. Keywords： boiler； selfadaptive fuzzy controller； SCM； simulation IV 目 錄 摘 要 .................................................................................................................................. I Abstract .............................................................................................................................. II 第 1 章 緒 論 ................................................................................................................. 1 引言 .................................................................................................................... 1 國內(nèi)外研究現(xiàn)狀 ................................................................................................ 2 研究對象及設計內(nèi)容 ........................................................................................ 2 第 2 章 鏈條燃煤鍋爐的控制 ........................................................................................... 4 鏈條燃煤鍋爐系統(tǒng)的簡介 .................................................................................. 4 燃煤鏈條鍋爐的結 構 ............................................................................... 4 鍋爐工作過程 ........................................................................................... 5 鍋爐的主要控制系統(tǒng) ............................................................................... 6 鍋爐燃燒系統(tǒng)的動態(tài)特 性 .................................................................................. 6 燃料傳送過程 ........................................................................................... 6 燃料燃燒過程 ........................................................................................... 7 蒸汽形成過程 ........................................................................................... 7 鍋爐供暖系統(tǒng)的控制要求 .................................................................................. 7 鍋爐燃燒控制系統(tǒng)框圖 ...................................................................................... 9 給煤調節(jié)系統(tǒng)的設計 ............................................................................... 9 送風調節(jié)系統(tǒng)的設計 ............................................................................. 12 引風調節(jié)系統(tǒng) 的設計 ............................................................................. 13 爐膛負壓調節(jié)系統(tǒng) ................................................................................. 14 計算機控制系統(tǒng) ................................................................................................ 14 計算機控制系統(tǒng)一般概念 ..................................................................... 14 V 計算機控制系統(tǒng)設計原理 ..................................................................... 15 第 3 章 控制算法 ............................................................................................................. 16 引言 .................................................................................................................... 16 PID 控制 ........................................................................................................... 16 模糊控制 ............................................................................................................ 18 模糊控制器 ............................................................................................. 18 模糊控制系統(tǒng)原理框圖 ......................................................................... 20 模糊 — PID 復合控制 ......................................................................................... 20 PID 參數(shù)模糊自整定控制原理 ............................................................... 21 PID 參數(shù) Fuzzy 整定模型 .................................................................... 22 模糊自整定 PID 控制器 ......................................................................... 23 簡化的模糊 — PID 控制 ..................................................................................... 24 二維模糊控制 ......................................................................................... 25 三維模糊控制 ......................................................................................... 26 鏈條鍋爐燃燒控制方案 .................................................................................... 27 第 4 章 系統(tǒng)硬件設計 ..................................................................................................... 29 硬件結構 ...................................