基于plc工業(yè)鍋爐汽包水位控制系統(tǒng)的設(shè)計-大學(xué)學(xué)位論文范文模板參考資料-展示頁
2024-12-19 01:03本頁面
【正文】 asonable, it is improper to deal with, and will often cause the accident. The majority in these accidents is caused because of improper in control the water level of the boiler. That can see the importance in the equipment control system of the boiler of control of water level of steam dome of the boiler. The autocontrol of the drum water level is very important. The drum water level is an important variable to be controlled, it is hard to get the mathematic model of the water level with adjust process. It is characteristic of nonlinearity, instability and time lag. The traditional control mode of threevariable in the drum water level most use PID, the effect of it can be improved. The fuzzy control does not need precise mathematic model of the controlled object, it only needs the experience of operator and the date of operating it has good robustness and it fit to control the system with nonlinearity and lag. Keywords: Drum water level, FuzzyPID, Threevariable II 目 錄 摘 要 ............................................. I ABSTRACT ......................................... I .............................................. 1 ................................. 1 工業(yè)鍋爐的控制要求與工藝流程 .............................................................. 1 鍋爐設(shè)備控制系統(tǒng) ..................................................................................... 2 鍋 爐水位控制系統(tǒng)在鍋爐生產(chǎn)控制系統(tǒng)中的重要性 ............................... 3 3 鍋爐汽包水位的基本特性和汽包水位控制系統(tǒng) 方案選擇 ..... 3 鍋爐汽包水位控制對象的基本特性 .......................................................... 3 汽包水位在給水流量擾動下的動態(tài)特性 .............................................. 4 汽包水位在蒸汽負(fù)荷擾動下的動態(tài)特性 .............................................. 5 燃料量擾動下汽包水位的動態(tài)特性 ...................................................... 6 鍋爐汽包水位控制系統(tǒng)及控制方案選擇 .................................................. 7 單沖量水位控制系統(tǒng) ............................................................................. 7 雙沖量水位控制系統(tǒng) ............................................................................. 8 三沖 量水位控制系統(tǒng) ............................................................................. 8 三沖量模糊水位控制系統(tǒng) ..................................................................... 9 汽包水位控制系統(tǒng)方案的選擇 ............................................................ 10 4．鍋爐汽包水位模糊控制系統(tǒng)的設(shè)計 .................... 11 主回路模糊控制器的設(shè)計 ........................................................................11 確定模糊控制器的結(jié)構(gòu)及輸入、輸出語言變量 .................................11 III 確定各變量的隸屬度函數(shù)和賦值表 .....................................................11 模糊控制規(guī)則的確定 ........................................................................... 14 模糊控制響應(yīng)表的生成 ....................................................................... 14 模糊動態(tài)前饋控制器的設(shè)計 ................................................................... 16 PID 控制的設(shè)計 ....................................................................................... 16 控制的基本公式 ............................................................................. 16 PID 的參數(shù)設(shè)置 ................................................................................... 16 5. PLC 選型及資源分配 ................................ 17 PLC 電氣圖和 I/O 分配表 ........................................................................ 17 PLC 選型 ................................................................................................... 18 傳感器選型 .............................................................................................. 18 ........................................................................................... 18 .................................. 18 ................................................................................................... 19 ....................................................................................... 19 控制系統(tǒng)總流程圖設(shè)計 ....................................................................... 19 模糊控制流程圖 ...............................................................
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