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A Method of Assembly Line Balancing Considering Complexity

A technology of complexity and assembly line, applied in the field of assembly line balancing considering complexity, it can solve the problems of high probability of unqualified products coming off the assembly line, heavy burden and high complexity, so as to improve efficiency, balance complexity and reduce production rhythm disorder. Effect

Inactive Publication Date: 2019-01-25
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Workstations with high complexity have a higher probability of unqualified products going offline
Several complex job elements distributed to one workstation, despite the takt balance, the load is still heavy

Method used

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  • A Method of Assembly Line Balancing Considering Complexity
  • A Method of Assembly Line Balancing Considering Complexity
  • A Method of Assembly Line Balancing Considering Complexity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0070] The present invention uses MATLAB to compile executable programs according to the contents of the invention. Its effect is illustrated by an example of a passenger car assembly line of a car company. The example contains 109 job elements, the corresponding job time and error rate are shown in Table 1, and the priority relationship between job elements is as follows figure 1 As shown, the number represents the sequence number of the operation element, and the arrow connects two operation elements. The operation element pointed by the arrow is the subsequent operation element, and the operation element before the arrow is the immediate predecessor operation element. Generate a priority matrix based on the priority relationship graph, which can be read into an executable program for calculation. The task of the invention is to control the tempo of the whole line within 22s according to the production plan, seek the maximum balance rate and balance the complexity of each w...

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Abstract

The invention relates to an assembly line balance method drawing complexity into consideration, in order to obtain a distribution solution of each working element of an assembly line in each working station. The method comprises the following steps: (1) defining working element complexity and working station complexity; (2) acquiring a constraint condition of a multi-target optimization model, and establishing the multi-target optimization model by targeting at the maximum balance ratio and the minimum working station complexity balance index according to the working element complexity and the working station complexity; (3) solving the multi-target optimization model by adopting a genetic algorithm to obtain an optimal distribution solution. Compared with the prior art, the assembly line balance method has the advantages of balancing the working time of each working station, balancing the complexity of each working station, avoiding balance failures of the assembly line, caused by accumulation of uncertainty factors, improving the robustness of the balance solution of the assembly line and the like.

Description

technical field [0001] The invention relates to the technical field of automated production lines, in particular to an assembly line balancing method considering complexity. Background technique [0002] Assembly line balance is a process of achieving a balance between labor productivity, equipment utilization, and market demand. It refers to how to distribute assembly operations to workstations along the line as evenly as possible for a given transmission speed and total amount of operations. Without violating the restrictions on the execution sequence of each job element, and ensuring that the total job time of each workstation does not exceed the specified period. Most of the evaluation indexes of production line balance are studied based on the assembly time of each workstation, and the purpose is mostly to maximize the work efficiency of the production line. However, since the working time of working elements is an ideal static value, it does not consider the complexit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/50G06N3/12
CPCG06F30/20G06F2111/04G06N3/126
Inventor 刘雪梅范国良李爱平徐立云马淑梅谢楠
Owner TONGJI UNIV
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