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Availability evaluation method for periodic inspection equipment having failure/maintenance time subject to random distribution

A maintenance time, random distribution technology, applied in the direction of the instrument, etc., to achieve the effect of strong versatility

Active Publication Date: 2017-08-04
NAVAL AVIATION UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of these problems are specific models for specific systems, such as availability models where failure / repair time obeys exponential / constant, exponential / exponential, Weibull / exponential distribution types, and there is no system failure / repair time that obeys a general probability distribution. general model

Method used

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  • Availability evaluation method for periodic inspection equipment having failure/maintenance time subject to random distribution
  • Availability evaluation method for periodic inspection equipment having failure/maintenance time subject to random distribution
  • Availability evaluation method for periodic inspection equipment having failure/maintenance time subject to random distribution

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Experimental program
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Embodiment Construction

[0033] Usability assessment methods such as figure 1 As shown, it specifically includes the following steps.

[0034] Step 1: Determine the failure / maintenance time distribution function and parameters of the system

[0035] The system failure / maintenance time is Weibull / normal distribution, and the failure time distribution function is In the formula, m is the shape parameter of Weibull distribution, η is the scale parameter of Weibull distribution; the maintenance time distribution function is μ is the mean value of normal distribution, σ is the variance of normal distribution; the parameters of Weibull distribution are η=0.5 and m=2, and the parameters of normal distribution are u=0 and σ=1;

[0036] Step 2: Construct the availability model of the system

[0037] Same as Step 2 of the Summary of the Invention.

[0038] Step 3: Determine the instantaneous availability equation of the system

[0039]

[0040] Step 4: Determine the system inspection cycle and calcula...

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Abstract

The invention discloses an availability evaluation method for periodic inspection equipment having the failure / maintenance time subject to random distribution. The method includes the basic steps of (1) basic assumptions of a problem; (2) construction of the equipment availability model; (3) system availability model solution based on a recursive algorithm; (4) statistics of equipment failure / maintenance time distribution functions and parameters, and determination of maintenance strategies and inspection cycle; (5) availability calculation of the equipment in the target time. The method can solve the system failure time / maintenance time to subject to different distribution manners, adopts the complete maintenance strategy to inspect the transient availability of the system with periodic changes in the task inspection cycle and the limit average availability of the entire life cycle, the solution result is real and effective, the solution process can reflect the dynamic relationship between the failure time, the maintenance time and the inspection cycle, and provides the important reference basis for the design and maintenance of the equipment.

Description

technical field [0001] The invention discloses a periodic inspection equipment availability evaluation method in which the failure / maintenance time obeys arbitrary distribution, relates to equipment reliability and maintainability, and belongs to the technical field of equipment comprehensive support. Background technique [0002] In view of the fact that it is difficult to implement real-time monitoring and inspection of many equipments, most aviation equipment adopts a combination of condition-based maintenance and regular maintenance. Regular maintenance mainly inspects, repairs and maintains some systems or components of equipment through a relatively fixed inspection cycle. The availability of this type of system was first proposed by Barlow and Proschan in 1975. Hoyland and Rausand developed this idea. Under the assumption of v≡0, a special case of system availability model was constructed. Sarkar and Chaudhuri The system availability problem that the failure time of ...

Claims

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Application Information

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IPC IPC(8): G06Q10/00
CPCG06Q10/20
Inventor 李军亮滕克难李保刚杨春周孙媛李季颖滕飞刘星
Owner NAVAL AVIATION UNIV
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