Transient analysis method for reworking system under customized production

Abstract

The invention discloses a rework production system transient performance analysis method based on an unreliable machine, a limited buffer area and customized production, and belongs to the field of production system engineering. The realization method comprises the following steps: carrying out structured modeling on the rework production system to form a physical model for analysis, and then carrying out modeling on the system state through a Markov method; on the basis of modeling, six transient performance indexes are defined for an unreliable machine, a limited buffer area and a customized production rework production system to evaluate system performance; according to the method, a dynamic decomposition-aggregation algorithm is provided, an auxiliary serial line and an auxiliary single-machine line are obtained through structural decomposition and state decomposition, then the auxiliary serial line and the auxiliary single-machine line are aggregated to obtain a dual-machine system, and the transient performance of an original reworking production system is predicted with high precision through the dual-machine system; the transient performance comprises productivity, consumption rate, completion time, inventory level of articles in process, hunger rate and blocking rate.

Description

technical field [0001] The invention relates to the field of production system engineering, in particular to an analysis method for evaluating the transient performance of a rework system under customized production. Background technique [0002] In the 14th Five-Year Plan, my country proposed to implement intelligent manufacturing and green manufacturing projects in depth, develop new service-oriented manufacturing models, and promote high-end, intelligent, and green manufacturing. At present, the product structure and manufacturing process of my country's high-end equipment manufacturing industry (such as aerospace, rail transit, automobile and ship, etc.) are complex, and there are many types and quantities of supporting parts. The production process of high-end equipment has the characteristics of high technical difficulty, multiple varieties, single set, small batch, variable batch, etc., and there are uncertainties in product types, order quantities and production batc...

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Problems solved by technology

[0004] At present, there are few relevant studies on the transient performance of rework production systems under customized production. For multi-variety and small-batch production models, traditional steady-state analysis methods are not applicable, especially in high-end manufacturing industries. Strategies need to be adjusted in real time, so it is necessary to design an efficient and fast method to evaluate the transient performance of the reworked system

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