Research On Automatic Control System Of Mine Mobile Belt Tail Pieces

As the important composition part of transportation system on the comprehensive mechanized mining face, mobile belt tail pieces is the critical link connecting bridge stage loader and belt conveyor, The main function is to cooperate the impelling of stage loader in the process of the whole working face,and make the belt tail moving concertedly, receiving the material from the stage loader, and then transferred to the belt transport system. Since the unique Ma Dier structure, the belt tail can be moved taking the stage loader as the fulcrum, while the deviation between tail stand and the center line of belt is corrected, all actions above are driven by the matching hydraulic system. But the existing mobile tails are manual operated,which could reduce the conveying efficiency of material to some extent, and increase the labor intensity of the operator also, so there is an urgent need to improve the automation degree of the belt tail.A set of Automatic control system of mobile belt tail pieces is designed according to the research of the structural characteristics of Ma Dier belt tail, controlling the belt tail moving and correcting automatically, and the latter is the difficulty and key technology to the control. The paper analyzes the movement and force of belt and roller in the process of rectification using horizontal cylinder. The motion characteristics is analyzed in three cases of belt rectification using the simplified model, then it is founded that the problem of oscillation, overshoot and velocity mutation occurs during rectification,If the control parameters can be adjusted automatically,problem could be solved.In order to solve problem of real-time adjustment of the parameters and improve the adjustment ability,a horizontal cylinder correction system based on Fuzzy PD algorithm is designed in this paper. The Fuzzy controller is built using the fuzzy toolbox in MATLAB,based on the method of Fuzzy algorithm,combined with motion characteristic of the system of horizontal cylinder-roller-belt. Because the system relates to friction, hydraulic system and control algorithm, the virtual model is built on the AMEsim plane,then combined with MATLAB to achieve the whole system simulation.The simulation results show that, the Fuzzy PD algorithm can reduce the system overshoot, oscillation and improve the response speed effectively.The correction mechanism of the vertical cylinder was also analyzed in this paper.The related model was built and analyzed. The conclusion is that the belt is always move towards the lower direction. At last, the conclusion was verified by the simulation using the AHSYS/LS-DYNA. After the mechanism analysis and the design of control algorithm, the design process of the control system is described in this paper. Hardware design includes building the system structure, selecting and designing sensor, constructing the controller. The software mainly includes the design of flow chart of control system, which is the framework for program. After the debugging and testing with relative equipment.Tt is proved that the system can be well applied on the equipment.