文档介绍：基于水箱液位控制设计年级:11电气( 3)班学号:11027112 姓名:程东碧专业:电气自动化指导老师: 摘要在人们生活以及工业生产等诸多领域经常涉及到液位和流量的控制问题,例如居民生活用水的供应, 饮料、食品加工, 溶液过滤, 化工生产等多种行业的生产加工过程, 通常需要使用蓄液池, 蓄液池中的液位需要维持合适的高度, 既不能太满溢出造成浪费, 也不能过少而无法满足需求。因此液面高度是工业控制过程中一个重要的参数,特别是在动态的状态下,采用适合的方法对液位进行检测、控制,能收到很好的效果。 PID 控制(比例、积分和微分控制)是目前采用最多的控制方法。本文主要是对一水箱液位控制系统的设计过程,涉及到液位的动态控制、控制系统的建模、 PID 算法、传感器和调节阀等一系列的知识。作为单容水箱液位的控制系统,其模型为一阶惯性函数,控制方式采用了 PID 算法,调节阀为电动调节阀。选用合适的器件设备、控制方案和算法,是为了能最大限度地满足系统对诸如控制精度、调节时间和超调量等控制品质的要求。关键词 PID 控制过程控制液位控制 Abstract: In people's life and in the fields of industrial production level and flow control problem, for example, the living water supply, beverage, food processing, filter solution, the production ofa variety of industries such as chemical production process, often need to use the liquid storage pool, liquid storage pool level need to maintain the appropriate height, neither too overflow cause waste, also cannot too little and can't meet the demand. So the liquid level height is an important parameter in the process of industrial control, especially in dynamic state, the suitable methods of liquid level detection, control, can get very good effect. PID (proportion, integral and differential control) is currently the most control methods. This paper is the design process ofa water tank liquid level control system, involves the dynamic liquid level control, the control system modeling, the PID algorithm, sensor and the regulator and a series of knowledge. As single let water tank liquid level control system, the model of first-order inertia function, control mode adopted PID algorithm, the regulator for electric regulator. Choose the ponents, equipment, control scheme and algorithm in order to maximize satisfy system such as control precision and adjust the volume of time and overshoot control quality requirements. K ey words : PID control process control level control 1 绪论 1. 1 过程控制的定义生产过程自动化,一般是指石油、化工、冶金、炼焦、造纸、建材、陶瓷及电力发电等工业生产中连续的或按一定程序进行的生产过程的自动控制。 1. 2 过程控制的目的生产过程中,对各个工艺过程的物理量有着一定的控制要求。有些工艺变量是决定安全生产的因素。