PLC 水位模糊控制

摘要

本文针对水位水流非线性、时变及滞后的特点，提出将基于PLC的模糊控制方法应用于水位控制系统。实验表明，该控制方法具有良好的控制效果，为水位自动控制提供了一种新的工程方法。随着我国城市和工业化的发展，水位控制广泛应用于工业与民用领域，采用模糊控制系统设计不需要知道被控对象精确的数学模型，对于许多无法建立精确数学模型的复杂系统能获得较好的控制效果，同时又能简化系统的设计，在水位控制系统中，模糊控制就成为较好的选择。并利用变频调速的优点，相比一般的控制可以节省电能40%，克服了传统控制的电能源消耗，造成浪费的问题。

关键词：PLC；水位控制；模糊控制；

Abstract

In this paper,,aiming at the characteristic of the canal flow nonlinear，time-varying and time-lagging, pro-pose applying fuzzy control based on PLC to the control 0f the irrigaition canal water leve1.The result of experimentation sho- ws that this method has excellent conttrol effect and a new engineering approa- ch is given for the automatic control of canal water leve1．With the deve- loping of our city and industrialization , Water level control system applicati- on at indus- try and civil field , fuzzy control system is not to know mathematics model, can w- in the better control result to a lot of unable complicated systems, at the same time can reduced system design, so, on water level control system, control fuzzy beco- me better choice. And make good use of the transducer , compare with the comm- on control system can save electric 40 percent , overcome problem of the common control system waste electric sources of energy.

Key words: PLC; Water level control; fuzzy control