Research On Mine Louvered Wind Window Control System Based On Improved PID

The ventilation system is an important part of the mine and the basic guarantee for safe production in the mine.Under the background of mine intelligent ventilation construction,the existing local resistance adjustment facilities still have the problems of isolation,backwardness and incoordination,lack of controller algorithm research for ventilation facilities wind regulation characteristics,through the research of local ventilation facilities automatic regulation system based on real-time network solution,an intelligent dynamic control system is established to achieve rapid dynamic adjustment of wind resistance and air volume of local ventilation facilities,so as to enhance the dynamic adaptability of supply and demand matching and disaster prevention,mitigation and disaster resistance of mine ventilation system.Specific results are as follows:The regulation principle and branch optimization method of mine ventilation network are analyzed,which lays a foundation for the optimization selection of regulation branch and the generation of wind window regulation scheme.Based on the PID controller principle,the design methods of piecewise PID control and fuzzy PID control are compared and analyzed.In order to study the regulation characteristics and influence rules of louvered wind Windows on the branch air field and wind pressure field of roadway,taking the louvered wind window regulation facility in underground roadway as the prototype,Fluent software was used to establish a full-size physical model,and the distribution characteristics of air field near the regulation facility were explored by changing different Angle of wind window blades.It is concluded that there is a second-order exponential decay relationship between the opening Angle of the wind window blade and its equivalent wind resistance,and the range of the sensitive and low sensitive opening Angle of the wind window is obtained.Moreover,it is concluded that the equivalent wind resistance of the automatic wind window with the same opening Angle is almost unchanged under different wind speeds in the roadway.Based on the comprehensive analysis of the numerical simulation results of the wind window regulation process,in order to further obtain the PID regulation model of the louvered wind window,the automatic wind window regulation experiment platform was built independently,and the experiment verified the automatic regulation theory of the louvered wind window.The least square method is used to identify the system of wind window adjustment system,and its transfer function model is obtained.Based on the traditional PID control model,combined with the flow control characteristics of automatic wind window,a piecewise PID controller is proposed,and the simulation analysis and experimental verification of PID,fuzzy PID and piecewise PID control algorithms are carried out by MATLAB/Simulink software.The results show that the performance of piecewise PID controller is better than PID control and fuzzy PID control in the dynamic control of ventilation system.The control precision is higher,the overshoot is smaller,and it can realize the stable and continuous control of the wind window air volume.Based on the PID regulation model of louvered wind window,the remote monitoring software module of regulating wind window with the functions of air demand prediction and branch optimization is developed,which is embedded in the intelligent ventilation platform of Zhuilongwan Coal mine,and combined with the facility of regulating wind window of underground,the field application of regulating air volume control is carried out.