【正文】 ............................ 28 軟件設計思路 ............................................................................................... 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 ................................................................................................ 30 顯示環(huán)節(jié)軟件設計 ............................................................................... 33 上位機控制軟件設計 ........................................................................... 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 算法的設計及分析 ................................................................................ 40 控制算法的確定 .................................................................................. 400 數(shù)學模型的建立 .................................................................................... 41 基于 Matlab 仿真 ......................................................................................... 44 VI 結(jié) 論 ...................................................................................................................... 47 致 謝 ...................................................................................................................... 48 參考文獻 .................................................................................................................. 49 附錄 1 設計系統(tǒng)部分源代碼 .............................................................................51 附錄 2 系統(tǒng)硬件圖 ............................................................................................54 VII CONTENTS ABSTRACT................................................................................................................ I ABSTRACT..............................................................................................................III Chapter 1 Introduction............................................................................................ 1 Design background and significance of a....................................................... 1 Research status ................................................................................................. 2 Design Objective.............................................................................................. 4 Chapter 2 HRSG steam temperature control system design ............................. 6 Control scheme selection................................................................................. 6 Factors affecting the superheated steam temperature............................. 6 Singleloop control scheme...................................................................... 9 Cascade Control Programme ................................................................. 10 Feedforward control program ................................................................ 12 Comparison of control schemes and programs identified ........................... 14 Comparison of 11 control scheme ......................................................... 14 The program identified ........................................................................... 15 Chapter 3 Hardware Design ................................................................................. 16 System Block Diagram .................................................................................. 16 With 8155 microcontroller interface circuit ................................................. 17 Signal input section ....................................................................................... 17 The temperature signal acquisition and processing .............................. 18 A / D converter ........................................................................................ 19 Shows the circuit design ................................................................................ 19 Signal output section ..................................................................................... 21 VIII D / A converter ........................................................................................ 21 420mA standard signal output .............................................................. 22 Serial Communication between PC Circuit .................................................. 22 Alarm Circuit Design ..................................................................................... 23 Keyboard Circuit Design ............................................................................... 24 Regulated Power Supply Circuit Design ...................................................... 25 Minimum System Microcontroller ............................................................. 26 Clock Circuit......................................................................................... 26 Reset Circuit .........................................................