基于matlab的锅炉汽包液位控制仿真研究

1、基于matlab的锅炉汽包液位控制仿真研究摘要锅炉是化工、炼汕、发电、造纸和制糖等工业生产过程中必不可少的垂要动力设备。 锅炉往往成了不少工厂不可缺少的一部分。因而，对锅炉设备中的自动控制系统进 行分析研究是必要的。锅炉是工厂生产过程屮重要的动力设备。锅炉水位控制系统是锅炉生产控制系统屮 最重要的环节。对锅炉生产操作如果不合理往往会引起事故。这些事故中的大部分 是由于锅炉水位控制不当引起的，可见锅炉汽包水位控制在锅炉设备控制系统屮的 重要性。传统的锅炉汽包液位控制系统人都采用pid控制。而模糊控制不要求知道被控对象 的粘确数学模型，只需要操作人员的经验知识及操作数据，鲁棒性强，适合用于非 线性

2、、滞后系统的控制，但其静态性能不能令人满意，限制了它的应用。为消除模 糊控制的稳态误差，木文将flzzy-p1d引入锅炉汽包液位的控制系统中，并利用 simulink分别在设定值及干扰作用下对控制系统进行仿真，结果表明，较之单纯的 模糊控制和常规pid控制，这种控制效果较为理想，可满足锅炉的汽包液位控制要 求。关键词：汽包液位；pid控制；模糊控制；fuzzy-pid控制；仿真the simulation study of boiler drum level control based on matlab abstractthe boiler is absolutely necessary s

3、ignificant power plant of industry productions process such as the chemical industry, heat edible oil, generation of electrical energy, papermaking and refines sugar and so on . as a result, it is indispensable systematically to analyze research to the automatic conirol in the boiler installation.th

4、e boiler is the power plant that the whole factory, segment that the boiler water level control system is the most significant in the boiler. to boiler production operation, if unreasonable will often cause the accident. the majority of these accidents are boiler water monitor causing improper, obvi

5、ously the importance of boiler drum water level control in the boiler device control systentthe traditional control mode of the drum water level mostly uses p1d. the fuzzy control does not need precise mathematical model of the controlled object, it only needs the experience of operator and the data

6、 of operating, it has good robustness and is fit to control the system with nonlinearity and time lag, but its static characteristic is dissatisfied, which limits its application. it is usual mode of three-variable drum water level in order to eliminate the static error that using fuzzy-pid control,

7、 and the simulation with the acti on of set ting value and noise. the resu it of simulation in di cates that the effect of control improves comparing with simple fuzzy control and traditional pid control, which can satisfy the control requirement of the drum water level.keywords: drum level; pid con

8、trol; fuzzy control; fuzzy-pid control; simulation前言11. 锅炉控制及主耍研究内容31. 1锅炉控制现状31.2控制方法的分类31.3文章主要内容42. 锅炉汽包液位系统特性与控制方法分析62. 1锅炉汽包液位概述62. 2汽包水位的动态特性62. 2. 1汽包水位在给水流量作用下的动态特性72. 2.2汽包水位在蒸汽流量作用下的动态特性92. 3锅炉汽包液位控制112. 3. 1单冲量控制系统112. 3.2双冲量控制系统122. 3.3三冲量控制系统133控制理论分析153. 1ptd控制理论153. 1. 1pid控制器简述153. 1.2pid控制器的结构153. 2模糊控制理论173. 2. 1模糊控制理论的基本思想183. 2.2模糊控制的系统组成183. 2.3模糊控制器的工作原理193. 3模糊p1d控制223. 3. 1模糊-pid控制器的基本结构233. 3. 2模糊pid控制器的设计步骤234. 锅炉汽包液位pid控制系统设计及仿真研究254. 1 关于 matlab 254. 1. 1 关于 simul1nk 254.1.2仿真实现264. 2