基于模糊控制的清水池水位控制系统设计

Designing of Level Control System in Clean Water Tank Based on Fuzzy Control

摘要:

清水池水位控制具有时变、滞后、突发性强等特点,难以准确建立合适的数学模型,为了达到快速维持清水池水位在期望值,避免所有水泵同时启停的目的,提出了一种清水池水位模糊控制的方法,该方法借助于MATLAB软件对控制系统进行了仿真,验证了模糊控制算法在清水池水位控制系统中应用的合理性,并计算出模糊输出控制量表,为确定水泵启停台数提供指导；采用了S7-200 PLC控制器和MCGS组态软件实现了清水池模糊控制系统的程序设计,给出相应的模糊控制PLC程序,并应用于清水池水位控制系统中；结果表明,系统稳定性好,响应速度快,能够较好地满足控制要求;系统将模糊控制理论与实际控制相结合,满足了清水池水位控制的要求,延长了水泵使用寿命,节省电能,为清水池水位自动控制提供借鉴。

Abstract:

According to the features of the time-variant,time-lag, strong burst and the mathematics model that is hard to build in clean water tank. In order to achieve the goal of rapid maintenance the water level at the expected value in the water tank ,and the start and stop of all the water pump at the same time are avoided. A kind of method has been put forward with fuzzy control.By means of MATLAB software,we simulate the control system and verify the rationality of fuzzy control algorithm using in clear water tank water level control,then calculate the output of fuzzy controller and to provide guidance for determining the pump units of the start and stop. S7-200 PLC controller and MCGS configuration software used,we realized the program design of fuzzy control system for the water tank,and given the corresponding fuzzy control PLC program which was applied to the water level control system of the water tank.The result shows that the system has better stability ,fast response which satisfies the control requirements.The fuzzy control theory is combined with the actual control to meet the requirements of the water level control of the water tank, which can extend the service life of the pump, save the electric energy, and provide reference for the automatic control of the water level in the tank.