Fuzzy Control Method and System for Cement Mill Feeding Quantity

Abstract

The invention discloses a fuzzy control method and system for the cement grinder feed quantity. The method comprises the following steps of establishing a membership function corresponding to the rated power deviation of the main motor of the grinder, the membership function of the optimal current deviation of the motor of the grinder tail bucket elevator and the membership function of the increment of the grinder feed quantity, and obtaining the assignment table for fuzzy variables; establishing a fuzzy control rule according to the assignment table of the fuzzy variables and obtaining a fuzzy relation matrix to control the fuzzy control output according to the fuzzy reasoning synthesis rule; and adjusting the feed quantity according to the level value of the deviation between the actual grinder feed quantity output by the fuzzy control and the target value. The fuzzy control method enables the grinder to run at a high-efficiency state.

Description

Technical field [0001] The invention relates to the field of fuzzy control, and in particular to a method and system for fuzzy control of cement mill feeding amount. Background technique [0002] For the cement grinding process of the closed-circuit process, the fine and small particles after grinding are discharged through the classifier, and the coarse particles are again fed into the mill through the tail bucket elevator motor for grinding, together with the grinding head cement grinding feed amount Re-enter the grinding process, so that the material in the cement mill is in a dynamic circulation state. This kind of material circulation condition called cyclic load must maintain a dynamic balance. However, the grindability of the material and the wear of the grinding body This balance will be broken by the temperature, the moisture of the material in the mill, the negative pressure at the end of the mill, the speed of the separator and the opening of the bypass damper, etc., w...

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Problems solved by technology

[0002] For the cement grinding process of the closed-circuit process, the fine particle materials after grinding are discharged through the powder classifier, and the coarse particle materials enter the mill again through the tail bucket lifting motor for grinding. Re-entering the grinding process, so that the material in the cement mill is in a dynamic circulation state. This material circulation state called cyclic load must maintain a dynamic balance. However, the grindability of the material and the wear of the grinding body degree, the moisture content of the material in the mill body, the negative pressure at the end of the mill, the speed of the classifier and the opening of the bypass damper, etc. will break this balance, resulting in unstable load of the mill, empty grinding phenomenon and full grinding phenomenon, reducing the mill High operating efficiency, increased power consumption per unit production, and even caused production equipment failure

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