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Mechanical system reliability distribution method based on minimum variable OWGA and fuzzy DEMATEL

A technology of mechanical systems and distribution methods, applied in geometric CAD, electrical digital data processing, instruments, etc.

Active Publication Date: 2020-01-17
CHONGQING UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] Traditional reliability allocation methods are far from meeting the needs of existing technologies

Method used

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  • Mechanical system reliability distribution method based on minimum variable OWGA and fuzzy DEMATEL
  • Mechanical system reliability distribution method based on minimum variable OWGA and fuzzy DEMATEL
  • Mechanical system reliability distribution method based on minimum variable OWGA and fuzzy DEMATEL

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Embodiment Construction

[0063] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0064] Such as figure 1 As shown, the present invention discloses a mechanical system reliability assignment method based on minimum variability OWGA and fuzzy DEMATEL, including:

[0065] S1. Use the FMA structure decomposition tree to extract the meta-action set in the mechanical system;

[0066] Such as figure 2 As shown, taking the automatic pallet changer of the precision horizontal machining center as an example, according to the "function-movement-action" motion characteristics of the automatic pallet changer of the precision horizontal machining center, 12 meta-actions are obtained by using the FMA structure decomposition tree , each meta-action is the most basic motion unit to ensure the normal operation of the automatic pallet changer. The normal operation of the machine tool depends on the prescribed movement between each element action.

[00...

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Abstract

The invention discloses a mechanical system reliability distribution method based on minimum variable OWGA and fuzzy DEMATEL. The analysis method comprises the following steps that firstly, decomposing a product function into the most basic motion unit (namely meta-action) by means of a function-motion-action structure decomposition tree; then, determining a fuzzy allocation weight (namely an initial allocation weight) of the meta-action under the condition of a reliability allocation factor by utilizing a minimum variability OWGA weight method; meanwhile, in consideration of interaction (namely coupling) between meta-actions, a decision test and evaluation experiment method (DEMATEL) is adopted to correct an initial allocation weight obtained by fuzzy allocation, so that a comprehensive weight of reliability allocation of the meta-actions is determined, and a reliability target value of the mechanical system is allocated to each motion unit. According to the method, more detailed reliability input parameters are further obtained from the perspective of structural characteristics of a mechanical system, and therefore guidance is provided for reliability design of complex mechanicalproducts.

Description

technical field [0001] The invention relates to the field of reliability design and analysis of complex mechanical systems, in particular to a mechanical system reliability allocation method based on minimum variability OWGA and fuzzy DEMATEL. Background technique [0002] Reliability allocation is an important task in reliability design, which involves determining the target reliability of components or subsystems to meet operational needs. The main purpose is to allocate limited resources while meeting reliability goals. However, the reliability allocation of mechanical systems at this stage is still at the subsystem or component level, and it is impossible to obtain more detailed reliability input parameters. In addition, in the reliability assignment process, in order to simplify the calculation process, the interaction between parts or components is often ignored, which leads to a certain deviation between the reliability assignment results and the actual results. [...

Claims

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Application Information

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IPC IPC(8): G06F30/17G06F119/02
Inventor 陈一凡张根保冉琰王治超李健庾辉
Owner CHONGQING UNIV