A fuzzy logic control method for a mechanical moving screen jig

Abstract

The invention relates to a fuzzy logic control method for a mechanical movable sieve jig, which solves problems of difficult parameter setting, unsuitability for nonlinear and hysteretic system control and unsatisfactory actual gangue discharging effect existing in the prior art. The method comprises the steps of setting a power value of a gangue layer according to on-load power of equipment, andcollecting the power of a main driving motor of the mechanical movable sieve jig in real time through a power transmitter; performing fuzzy processing on the movable sieve power deviation, the deviation change rate and the gangue discharging curve correction rate, and then formulating a fuzzy rule table by combining gangue discharging control process requirements and practical experience of the mechanical movable sieve jig; performing defuzzification according to a weighted average method to obtain the gangue discharging curve correction rate; and then carrying out curvature adjustment on a gangue discharging curve formula by using the gangue discharging curve correction rate obtained by fuzzy control so as to automatically adjust an output value. The method can perform fuzzy judgment according to changes in incoming amount of raw coal, realizes intelligent control for speed changes of a gangue discharging wheel, can improve a separation effect of the raw coal and is high in adaptability.

Description

technical field [0001] The invention belongs to the technical field of coal washing and separation, and relates to a method for separating coal and gangue, in particular to a method capable of making fuzzy judgments based on changes in the amount of raw coal, realizing intelligent control of changes in the speed of gangue discharge wheels, improving the effect of raw coal separation, and strong adaptability The fuzzy logic control method of the mechanical moving screen jig. Background technique [0002] After the raw coal enters the preparation workshop of the coal preparation plant or the dynamic screen body of the mechanical dynamic screen jig in the raw coal separation system of the coal mine, the specific gravity of the coal is relatively small and the specific gravity of the gangue is relatively large, so the gangue suspended in the water falls. The speed is relatively fast; through the repeated vibration of the screen body, the gangue is stored on the edge of the scree...

AI Technical Summary

Problems solved by technology

Its mathematical model is simple, its online parameters are highly adjustable, and its adaptability is strong; but its steady-state accuracy is not high and its reasoning speed is slow, so it is not suitable for the control of nonlinear and hysteresis systems

[0008] Especially in the underground coal separation system of coal mines, due to the influence of various factors such as different raw coal volumes, uneven feeding, and different proportions of coal and gangue caused by underground coal mining through faults, the underground mechanical dynamic screen jig coal washing system It has the characteristics of high nonlinearity, time-varying uncertainty and hysteresis, so the existing control method can no longer meet the needs of practical applications, so it is necessary to improve the control method of the existing mechanical dynamic screen jig

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