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A Fuzzy Method for Reliability Assignment of Mechanical System Based on Meta-action

A technology of mechanical systems and fuzzy methods, applied in electrical digital data processing, instruments, geometric CAD, etc., to achieve the effect of ensuring normal output

Active Publication Date: 2021-05-25
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

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  • A Fuzzy Method for Reliability Assignment of Mechanical System Based on Meta-action
  • A Fuzzy Method for Reliability Assignment of Mechanical System Based on Meta-action
  • A Fuzzy Method for Reliability Assignment of Mechanical System Based on Meta-action

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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 fuzzy method for reliability allocation of mechanical systems oriented to meta-actions, 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.

[0067] S2. Using...

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Abstract

The present invention discloses a fuzzy method for reliability allocation of mechanical systems oriented to meta-actions. The analysis method includes the following steps. First, the product functions are decomposed into the most basic Motor units (i.e. meta-actions). Then, the minimum variability OWGA weight method is used to determine the fuzzy assignment weights (namely initial assignment weights) of meta-actions under the condition of reliability assignment factors. At the same time, considering the interaction (i.e., coupling) between meta-actions, the decision experiment and evaluation experiment method (DEMATEL) is used to correct the initial assignment weights obtained by the fuzzy assignment, thereby determining the comprehensive weight of the reliability assignment of meta-actions, and then The mechanical system reliability target value is assigned to each motion unit. The method of the invention further obtains more detailed reliability input parameters from the perspective of the structural characteristics of the mechanical system, thereby providing guidance for the reliability design of complex mechanical products.

Description

technical field [0001] The invention relates to the field of reliability design and analysis of complex mechanical systems, in particular to a fuzzy method for reliability allocation of mechanical systems oriented to meta-actions. 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 process of reliability assignment, in order to simplify the calculation process, the interaction between assignment indicators is often ignored, which leads to a certain deviation between the reliability assignment results and the actual results. [0003] A ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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