《A3000实验台双水箱液位串级控制系统设计》》-毕业论文.doc

PAGE 摘 要 现代工业的发展对控制系统的控制品质提出了新的要求，简单的单回路控制已经难以满足一些复杂的控制要求。串级控制系统把两个单回路控制系统以一定的结构形式串联在一起，它不仅具有单回路控制系统的全部功能，而且还具有许多单回路控制系统所没有的优点。本论文论述了一个基于S7200的液位——流量串级控制系统的设计方法和步骤，在A3000过程控制实验系统上，我被控对象进行了数学建模，，进行了串级控制系统的设计，并对PID参数进行了整定，并使用了组态王开发了监控画面，进行对下位机的监控。 关键词：串级控制；液位；流量 ；监控 Abstract The development of modern industrial control systems to control the quality of proposed new requirements, a simple single-loop control has been difficult to meet some of the complex control requirements. Cascade control system of the two single-loop control system in series with a certain structure, it not only has the single-loop control system for all functions, but also single-loop control system has many advantages not available. This paper discusses a liquid level based on S7200 - flow cascade control system design methods and procedures, process control experiment in the A3000, I am charged with a mathematical model objects, carried out the design of cascade control system , and the PID parameters tuning, and use the monitor screen King view developed to conduct surveillance on the lower computer. Keywords: Cascade control; liquid level; flow; monitoring 目 录 TOC \o 1-3 \h \z \u HYPERLINK \l _Toc264576140 第一章 绪论 PAGEREF _Toc264576140 \h 6 HYPERLINK \l _Toc264576141 1.1 选题背景 PAGEREF _Toc264576141 \h 6 HYPERLINK \l _Toc264576142 1.2 被控对象 PAGEREF _Toc264576142 \h 6 HYPERLINK \l _Toc264576143 1.3 控制系统要求 PAGEREF _Toc264576143 \h 6 HYPERLINK \l _Toc264576144 第二章 系统方案选择 PAGEREF _Toc264576144 \h 7 HYPERLINK \l _Toc264576145 2.1 常见控制规律的类型 PAGEREF _Toc264576145 \h 7 HYPERLINK \l _Toc264576146 2.2 控制方案的比较选择 PAGEREF _Toc264576146 \h 7 HYPERLINK \l _Toc264576147 2.3 串级控制系统介绍 PAGEREF _Toc264576147 \h 8 HYPERLINK \l _Toc264576148 2.3.1 串级控制整体介绍 PAGEREF _Toc264576148 \h 8 HYPERLINK \l _Toc264576149 2.4 主副控制对象的选择 PAGEREF _Toc264576149 \h 11 HYPERLINK \l _Toc264576150 2.5 控制器的选择 PAGEREF _Toc264576150 \h 12 HYPERLINK \l _Toc264576151 2.5.1 PLC的特点及应用 PAGEREF _Toc264576151 \h 12