Numerical control machine tool reliability distribution method based on entropy weight method and hesitant fuzzy language item set

Abstract

The invention discloses a numerical control machine tool reliability distribution method based on an entropy weight method and a hesitant fuzzy language item set, belongs to the field of design of high-grade numerical control machine tools and basic manufacturing equipment, and particularly relates to a reliability distribution method of a numerical control machine tool. On the basis of a target feasibility technology, an ordered weighted averaging operator is used for deriving a polynomial equation to determine an optimal weighted vector under a maximum entropy, and in combination with the hesitant fuzzy language item set, the comprehensive influence degree of subsystems of the complexity (K), the maintenance (M), the cost (Co), the criticality (Cr), the technology level (S) and the working time (T) is correctly evaluated, so that the reliability distribution grades of the subsystems of the machine tool can be accurately judged. The defect of non-uniform measurement scale distributionof the target feasibility technology and a fuzzy distribution method is overcome fundamentally.

Description

technical field [0001] The invention relates to the design field of high-end numerically controlled machine tools and basic manufacturing equipment, in particular to a reliability distribution method of numerically controlled machine tools. Background technique [0002] Reliability assignment is one of the most important factors to consider when determining product reliability and competitiveness, and is an important analytical tool that can be used to improve system reliability. In recent years, due to the increased complexity of engineered systems used in high-tech industrial processes, concerns about system reliability have increased [0003] Reliability allocation is the work carried out in order to allocate the reliability index of the system to each component unit of the system according to certain criteria. Its purpose is to convert the reliability index of the whole system into the reliability index of each subsystem or unit to make them consistent. It is a decompo...

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Problems solved by technology

[0004] At present, the commonly used reliability allocation methods mainly include equal allocation method, allocation method considering importance and complexity, proportional combination method and score allocation method. These traditional reliability allocation methods do not take into account the influencing factors of reliability allocation, or not comprehensive enough

When it comes to reliability allocation for CNC machine tools, a system that integrates mechanics, electricity, fluid, light, gas, and light, and has extremely complex tasks, the above-mentioned traditional methods obviously cannot achieve this goal.

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