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Multiple fault mode assembly line performance assessing method

A failure mode, assembly line technology, applied in the direction of instruments, manufacturing computing systems, data processing applications, etc., can solve the problem that the assembly line stays in a single fault

Active Publication Date: 2016-08-31
NORTHWESTERN POLYTECHNICAL UNIV
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Problems solved by technology

[0005] At present, the research on serial and parallel production lines is relatively mature and has many achievements, while the research on assembly lines and closed-loop systems is less, and the research on assembly lines is still in the single-fault situation, and there is no modeling analysis of assembly lines in multi-fault mode. Often multiple failure modes

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  • Multiple fault mode assembly line performance assessing method
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  • Multiple fault mode assembly line performance assessing method

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Embodiment Construction

[0115] The embodiments of the present invention are described in detail below. The described embodiments are exemplary and are intended to explain the present invention, but should not be understood as a limitation to the present invention.

[0116] This embodiment uses a three-machine assembly line to illustrate the performance evaluation method of the multiple failure mode assembly line proposed by the present invention:

[0117] Table 1 Three machine assembly line machine parameters

[0118]

[0119] 1) Assembly line decomposition. By decomposing the virtual assembly line after introducing the capital flow, the building block l (MF 1 ) And l(FF 2 ).

[0120] 2) Establish a decomposition equation. Substituting m=3, a=2, η=1 into equations (7), (8), (10), the true failure rate equation, virtual failure rate equation, and processing equation can be obtained, as shown below:

[0121] ·True failure rate equation:

[0122] p 2 u ( FF 2 ) = D 1 d ( ...

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Abstract

The invention puts forward a multiple fault mode assembly line performance assessing method and explains reasonability of the same via a simulation experiment. The multiple fault mode assembly line performance assessing method comprises the following steps: a fund flow is introduced based on an original assembly line material flow so as to form a virtual assembly line; along a material flow plus fund flow direction, and the virtual assembly line is decomposed into a number of two-machine building blocks; decomposing equations for a real failure rate, a virtual failure rate and a processing rate are built; parameters of virtual machines in the building blocks are solved; again, the equations are subjected to solving operation via an iteration method (ALDA), performance indexes including a production rate and a quantity of articles being manufactured of the assembly line are finally obtained, the performance indexes and a simulation experiment results are subjected to numerical value comparing operation, and reasonability of the multiple fault mode assembly line performance assessing method can be verified.

Description

Technical field [0001] The invention relates to the field of manufacturing system performance evaluation, in particular to a multi-failure mode assembly line performance evaluation method for evaluating the average output of the assembly line and various buffer level indicators. Background technique [0002] Manufacturing (production) system performance evaluation is of great significance to the design, improvement and management of the production system. There are many different types of production structures in actual production, such as serial production lines, parallel production lines, assembly lines, etc. The statistical volatility and processing dependence of the production process make small disturbances have a great impact on the production system, and aggravate the complexity of the performance evaluation of the manufacturing system. These disturbance forms can be reflected in the form of failures to a certain extent. come out. Analysis and simulation are two importan...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q10/06G06Q50/04
CPCY02P90/30G06Q10/06393G06Q50/04
Inventor 王军强闫飞一崔鹏浩崔福东范国强胥军杨宏安
Owner NORTHWESTERN POLYTECHNICAL UNIV
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