工业锅炉的微机控制系统设计.doc

工业锅炉的微机控制系统的设计

摘要：目前，我国现有很多工业和民用中小型锅炉，其中大部分自动控制水平很低，存在燃烧不彻底、排烟氧含量偏高、排烟热损失大等问题，直接造成了锅炉热效率低下和大量能源的浪费，同时也给环境带来很大的污染，所以实现锅炉的计算机控制具有重要的意义。
本文基于PID控制策略给出了锅炉系统新的控制方法。工业锅炉的主要动态特性包括非线性、非最小相位系统、不稳定性、时滞和负荷干扰。采用传统控制方法难以实施有效控制，运用PID控制理论对锅炉的汽温进行了分析和控制系统设计，通过仿真和试验，所设计的控制系统能够克服种种干扰因素，使被控对象保持稳定达到好的控制效果。
关健字: PID控制;自整定；锅炉;蒸汽温度
 
Abstract
Now , there are a lot of medium and small sized boilers which are used in industrial and civil field. Due to the low efficiency and low-level automation, these boilers have many serious problems, such as coal burning incompletely, higher oxygen content and a greater heat loss in soot.These problems result in a lower heat eficiency of the boiler and a great of energy waste and polluting the environment. So it is very important to control the boilers in computer.
This paper put forward a control system of steam boiler using PID control reasoning. The major dynamic of a boiler include non-linearity non-minimum phase behavior instability time delay and load disturbances. Traditional control method can't offer satisfactory result. A new control system based on PID reasoning, is used to control temperature of steam ，the PID logic controller has tested by simulation and good result has been obtained
Keywords: PID control；self-adaptive；boile；Steam Temperatu