【正文】 paration, to achieve the required purity. The basic principle of distillation is the partial gasification of the liquid mixture, each ponent of the volatility characteristics, separation of the purpose of unit operations. Control of the distillation column is a direct impact on product quality, production and energy consumption, automatic control of distillation column has long been subject to great attention. Firstly, this paper outlines the working principle of the plate distillation column, disturbance distillation column were analyzed various factors to consider, by cascade control system for the control scheme of the system. Secondly, the hardware rectification column temperature control system design were analyzed, and the system used in sensor, transmitters, controllers and actuators of the selection. Temperature sensor selection SBWR2260K thermocouple temperature transmitter, regulator select DDZ2400 DDZⅢ type PID regulator. Then, the temperature control system mathematical modeling, introduces the modeling method, a mathematical model of the system, the mathematical model constructed analyzed in detail. Finally, the use of SIMULINK module MATLAB constructed model, the system debugging and simulation, by paring the simulation results, the results of the analysis concluded the main circuit and interference cascade control system has strong antijamming capability, achieved satisfactory control effect. 【 Key words】 Fractionator Cascade Control Matlab Simulation 重慶郵電大學(xué)移通學(xué)院本科 畢業(yè)設(shè)計（論文） V 目 錄 前 言 .............................................................................................................................................. 1 第一章 緒 論 .............................................................................................................................. 2 第一節(jié) 課題研究的背景和意義 .............................................................................................. 2 第二節(jié) 精餾塔控制的現(xiàn)狀 ...................................................................................................... 4 一、精餾塔國內(nèi)發(fā)展現(xiàn)狀 ....................................................................................................... 4 二、國外精餾塔及其技術(shù)的發(fā)展現(xiàn)狀 ................................................................................... 4 三、現(xiàn)階段精餾塔還存在的問題及解決方案 ....................................................................... 5 第三節(jié) 課題研究的內(nèi)容和章節(jié)安排 ...................................................................................... 5 一、研究內(nèi)容 ........................................................................................................................... 5 二、章節(jié)安排 ........................................................................................................................... 6 第二章 精餾塔溫度控制方案設(shè)計 .............................................................................................. 7 第一節(jié) 概述 .............................................................................................................................. 7 第二節(jié) 精餾塔的擾動分析 ...................................................................................................... 7 第三節(jié) 溫度控制方案的設(shè)計 ................................................................................................ 11 一、控制變量的選擇 ............................................................................................................. 11 二、溫度控制方案的選擇 ..................................................................................................... 11 第三章 控制系統(tǒng)的硬件設(shè)計 .................................................................................................... 16 第一節(jié) 溫度變送器的選擇 .................................................................................................... 16 一、特點 ................................................................................................................................. 16 二、主要技術(shù)指標(biāo) ................................................................................................................. 17 第二節(jié) 執(zhí)行器的選擇 ............................................................................................................ 17 第三節(jié) 調(diào)節(jié) 器的選擇 ............................................................................................................ 18 第四節(jié) 調(diào)節(jié)器與執(zhí)行器、檢測變送器的選型 .................................................................... 19 第四章 控制系統(tǒng)的數(shù)學(xué)模型 .................................................................................................... 20 第一節(jié) 數(shù)學(xué)模型簡介 ............................................................................................................ 20 一、數(shù)學(xué)模型的定義及特征 ................................................................................................. 20 二、建模應(yīng)用 ......................................................................................................................... 21 重慶郵電大學(xué)移通學(xué)院本科 畢業(yè)設(shè)計（論文） VI 第二節(jié) 建立數(shù)學(xué)模型的目的 ................................................................................................ 22 第三節(jié) 建模的方法 ................................................................................................................ 22 一、機理建模 ......................................................................................................................... 22 二、經(jīng)驗建模 ......................................................................................................................... 23 三、物料和能量守恒關(guān)系 ..................................................................................................... 23 四、一階系統(tǒng)建模 ................................................................................................................. 24 第四節(jié) 建立數(shù)學(xué)模型 ............................................................................................................ 24 第五章 系 統(tǒng)的 MATALAB 仿真 ...................................................................