基于中心逆解耦的vl精馏塔控制器设计与仿真大学学位论文.doc

吉林化工学院毕业设计说明书 基于中心逆解耦的VL精馏塔控制器设计与仿真 Controller Design and Simulation for VL-Type Chemical Distillation Based on Central Inversion Decoupling 学生学号： 学生姓名： 专业班级： 指导教师： 职 称： 起止日期： 摘 要 精馏是在炼油、化工等众多生产过程中广泛应用的一个传质过程。精馏过程通过反复的汽化与冷凝，使混合物料中的各组分分离，分别达到规定的纯度。精馏塔的控制直接影响到产品质量，产量和能量消耗，因此精馏塔的自动控制问题长期以来一直受到人们的高度重视。 精馏塔是一个多输入多输出的多变量过程，内在机理较复杂，不同的塔工艺结构差别很大，而工艺对控制提出的要求又较高，所以确定精馏塔的控制方案是一个极为重要的课题。本文通过熟悉精馏塔系统的动态模型，能对精馏塔设计解耦控制器，然后基于解耦控制器设计了PID控制器，并进行参数整定。利用MATLAB/Simulink软件，完成了系统仿真，结果表明达到了预期的控制效果。 关键词：精馏；PID；仿真 Abstract Distillation is a widely used mass transfer process in the refining, chemicals and many production process. Distillation process make the various components of hybrid material separation by repeating evaporation and condensation, respectively at the purity of specified. The control of the distillation column directly affects the product quality, output and energy consumption. Therefore, the automatic control of the distillation column has been attached great importance for a long time. The distillation column is a multi-variable process with multiple inputs and outputs, the internal mechanism is complex, the structure of different tower process is very different, and the requirements for controlling the process are higher, so making sure control scheme of rectification tower is a very important topic. In this paper, through the familiar distillation column dynamic model, we can design a decoupling controller for a distillation column and design a PID controller based on the decoupling controller and the parameters are setting. Using MATLAB/Simulink software finished the system simulation, the result shows that the expected control effect is achieved. Key Words：Distillation；PID；Simulation 目 录 摘 要 I Abstract II 第1章 绪论 1 1.1 课题研究背景与意义 1 1.2 精馏塔国内外研究现状 2 1.3 MATLAB简介 3 1.3.1 MATLAB的发展历程 3 1.3.2 MATLAB语言的特点 5 1.3.3 Simulink简介 5 1.4 本文的研究内容 6 第2章 精馏塔解耦控制器设计 7 2.1 精馏塔系统 7 2.1.1 精馏塔