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Method for improving memory cutting execution precision of coal mining machine

A coal shearer and memory technology, which is applied in the field of improving the execution accuracy of the memory cutting of the coal shearer, can solve the problems of low coincidence degree, large amount of remaining coal, difficult control of memory cutting execution accuracy, etc., so as to improve the smoothness and improve the The effect of execution precision

Active Publication Date: 2013-10-23
CHINA UNIV OF MINING & TECH +2
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Problems solved by technology

Existing problems: When the existing shearer memory cutting method is applied in practice, it is found that there is a low degree of coincidence between the actual cutting path and the expected cutting path. The floor cuts deep into rock or leftover coal, etc., which leads to the increase of uncertain factors in the execution of the existing shearer memory cutting method, the execution accuracy of memory cutting is difficult to control, and the cutting path of the shearer is not smooth

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  • Method for improving memory cutting execution precision of coal mining machine
  • Method for improving memory cutting execution precision of coal mining machine
  • Method for improving memory cutting execution precision of coal mining machine

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Embodiment Construction

[0032] The present invention will be further described below in conjunction with accompanying drawing.

[0033] Such as image 3 As shown, the specific steps of the method for improving the execution accuracy of shearer memory cutting are:

[0034] (1) Data collection: collect the floor height of each cutter of the shearer and the inclination angle of the rocker arm of the shearer, and calculate the height difference e between the front and rear cutter floors, the rate of change in height deviation c, and the change in inclination angle of the rocker arm of the shearer Δβ 2 ;

[0035] (2) Determine the input and output variables: For the memory cutting execution accuracy decrease caused by the height change of the floor, consider the height difference e between the front and rear blades and the height deviation change rate c as fuzzy input; change the inclination angle of the shearer rocker arm Δβ 2 As a fuzzy output, the fuzzy controller adopts a two-dimensional input-sing...

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Abstract

The invention discloses a method for improving the memory cutting execution precision of a coal mining machine. The method comprises the following steps of: (1) acquiring data, (2) determining input variables and an output variable, (3) setting discourse domain elements of the input variables e and c and the output variable delta beta2 and quantifying factors k1, k2 and k3, (4) determining a fuzzy control rule, (5) constructing a fuzzy control table, and (6) after the fuzzy control table is constructed, storing the fuzzy control table in a coal mining machine controller, in the running process of the coal mining machine, correcting a change range of the height of a roller of the coal mining machine in real time according to a fuzzy classification of the height change of a base plate, and adjusting an inclination angle of a swing arm according to the change range. Compared with the prior art, the method has the advantages that the memory cutting execution precision of the coal mining machine can be effectively improved and the flatness of a cutting path of the coal mining machine is improved to a certain extent.

Description

technical field [0001] The invention relates to a method for improving the memory cutting execution accuracy of a coal shearer, and belongs to the technical field of coal mining. Background technique [0002] For a long time, how to realize the identification of coal rocks and the automatic operation of coal shearers on this basis have been the research focus of experts and scholars at home and abroad. A series of technical methods, including the sensing boundary method, etc., but due to the complex and changeable environmental conditions in the underground, the proposed method has not achieved ideal results, and the goal of automatic operation of the coal mining machine has not been fully realized. On the one hand, coal mine production urgently needs to realize the automatic operation of coal mining machines. On the other hand, it is difficult to realize coal-rock recognition directly. Therefore, an indirect method for coal-rock interface recognition—memory cutting—was grad...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C35/24
Inventor 王忠宾涂兴子谭超周信闫海峰周晓谋姚新港刘新华渠清团李付生吴连城王冠鑫
Owner CHINA UNIV OF MINING & TECH
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