【正文】 n modules and other ponents. Temperature control is the key to both temperature and temperature. Temperature measurements are the basis for temperature control, this technology is more mature. However, due to more plex control object, the temperature control many problems still exist. This paper uses the PID algorithm boiler temperature control system design, and the use of simulation software MATLAB / SIMULINK simulation of the control algorithm. Keywords: single loop superheated steam microcontroller temperature control IV 目 錄 摘 要 ......................................................................................................................... I ABSTRACT.............................................................................................................. III 第 1 章 緒論 .............................................................................................................. 1 設(shè)計(jì)的背景及意義 ........................................................................................ 1 國內(nèi)外研究現(xiàn)狀 ........................................................................................ 2 設(shè)計(jì)的目的 ................................................................................................. 4 第 2 章 余熱鍋爐蒸汽溫度控制系統(tǒng)設(shè)計(jì) ............................................................ 6 控制方案選擇 ................................................................................................. 6 影響過熱蒸汽溫度的因素 ..................................................................... 6 單回路控制方案 ..................................................................................... 9 串級(jí)控制方案 ......................................................................................... 10 前饋控制方案 ........................................................................................ 12 控制方案的比較和方案確定 ...................................................................... 14 控制方案的比較 ................................................................................... 14 方案的確定 ............................................................................................ 15 第 3 章 系統(tǒng)硬件設(shè)計(jì) ........................................................................................... 16 系統(tǒng)結(jié)構(gòu)框圖 ............................................................................................... 16 單片機(jī)與 8155 的接口電路 ........................................................................ 17 信號(hào)輸入部分 ............................................................................................... 17 溫度信號(hào)采集與處理 ........................................................................... 17 A/D 轉(zhuǎn)換 ................................................................................................. 18 顯示電路設(shè)計(jì) ............................................................................................... 19 信號(hào)輸出部分 ............................................................................................... 21 D/A 轉(zhuǎn)換 ................................................................................................. 21 V 420mA 標(biāo)準(zhǔn)信號(hào)輸出 .......................................................................... 22 串口與上位機(jī)通信電路 .............................................................................. 22 報(bào)警電路設(shè)計(jì) ............................................................................................... 23 鍵盤電路設(shè)計(jì) ............................................................................................... 24 穩(wěn)壓電源電路設(shè)計(jì) ...................................................................................... 25 單片機(jī)最小系統(tǒng) ......................................................................................... 26 時(shí)鐘 電路 ............................................................................................... 26 復(fù)位電路 ............................................................................................... 27 第 4 章 系統(tǒng)軟件設(shè)計(jì) ........................................................................................... 28 軟件設(shè)計(jì)思路 ............................................................................................... 28 系統(tǒng)軟件流程圖 ........................................................................................... 28 主程序流程圖 ........................................................................................ 28 采樣子程序 ............................................................................................ 30 數(shù)字濾波 ................................................................................................ 30 中斷服務(wù) ................................................................................................ 30 顯示環(huán)節(jié)軟件設(shè)計(jì) ............................................................................... 33 上位機(jī)控制軟件設(shè)計(jì) ........................................................................... 34 PID 子程序 ............................................................................................. 35 第 5 章 系統(tǒng)的仿真 ................................................................................................ 38 仿真工具 ....................................................................................................... 38 MATLAB 及其模糊邏輯工具箱和仿真環(huán)境 ............................................. 38 MATLAB 概況 ....................................................................................... 38 模糊邏輯工具箱 .................................................................................... 39 PID 算法的設(shè)計(jì)及分析 ................................................................................ 40 控制算法的確定 .................................................................................. 400 數(shù)學(xué)模型的建立 .................................................................................... 41 基于 Matlab 仿真 ......................................................................................... 44