基于模糊控制的瓦斯变频控制系统设计

Design on Gas Frequency Conversion Control System Based on Fuzzy Control

瓦斯通风是煤矿井下采掘过程中保障安全的重要一环,由于瓦斯大量涌出时,现有调节方式具有一定的滞后性,无法快速有效地稀释工作面瓦斯。该研究基于西门子PLC、变频器、工业触摸屏设计了瓦斯智能控制系统,能够实时监测工作面的瓦斯特征和调节风机风量,可以通过触摸屏实现变频器的手自动切换、主备机切换等功能。同时通过分析局部通风机的通风特性,以瓦斯浓度偏差和偏差变化率为输入变量,设计了二维模糊控制器,分析建立了变频器-异步电动机的简要数学模型,利用SIMULINK对模糊控制器进行了仿真测试,并与传统PID控制进行了对比,测试结果表明该模糊控制器的控制效果较传统PID控制器的动态性能有所改善。

Gas ventilation is an important part of ensuring safety during underground coal mine mining.When a large amount of gas gushes out,the existing adjustment method has a certain lag and cannot dilute the gas in the working face quickly and effectively.This research designed a gas intelligent control system based on Siemens PLC,frequency converter,and industrial touch screen.It can monitor the gas characteristics of the working surface in real time and adjust the fan air volume.It can realize manual automatic switching of the frequency converter,main and backup machine switching and other functions through the touch screen.At the same time,by analyzing the ventilation characteristics of the local ventilator,a two-dimensional fuzzy controller was designed using the gas concentration deviation and deviation change rate as input variables.A brief mathematical model of the frequency converter-asynchronous motor was analyzed and established,and SIMULINK was used to carry out the fuzzy controller simulation tests were conducted and compared with traditional PID control.The test results show that the control effect of the fuzzy controller is improved compared with the dynamic performance of the traditional PID controller.