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Spare part guarantee probability calculation method and device for logarithmic normal universal part

A logarithmic normal and probability calculation technology, applied in the field of equipment spare parts support, can solve the problems of excessive procurement and storage of spare parts, waste, and failure to consider the interchangeability of common parts, etc., to achieve the effect of satisfying adequacy and reducing waste of resources

Active Publication Date: 2020-01-21
NAVAL UNIV OF ENG PLA
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the conventional method is adopted in the spare parts guarantee of common parts, the interchangeability of common parts will not be considered, resulting in excessive purchase and storage of spare parts, resulting in waste
In the process of overall planning of spare parts for common parts, from the standpoint of equipment users, a key question needs to be answered: "How to evaluate the guarantee effect of spare parts for each equipment when unified supply guarantee?" At present, there is no good solution method to answer the question

Method used

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  • Spare part guarantee probability calculation method and device for logarithmic normal universal part
  • Spare part guarantee probability calculation method and device for logarithmic normal universal part
  • Spare part guarantee probability calculation method and device for logarithmic normal universal part

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Embodiment 1

[0040] like figure 1 As shown, the embodiment of the present invention provides a method for calculating the spare parts support probability of lognormal general-purpose parts, including the following steps:

[0041] S1. Establish a probability matrix dyPs by using the failure probabilities of the common parts of each equipment. The element dyPs(i, j) in the matrix represents the probability of j-1 failures of the common parts of the i-th equipment, 1≤i≤N, 1≤j ≤S+2, N is the number of equipment equipped with log-normal general-purpose parts, S is the number of spare parts of log-normal general-purpose parts in the spare parts warehouse; the value of matrix element dyPs(i,j) is as follows:

[0042]

[0043] In the formula, Γ() is the gamma function, T i The planned working time for the i-th equipment of the lognormal general-purpose part within a guarantee period;

[0044] S2, make the current equipment number i=1;

[0045] S3, the other equipment numbers are stored...

Embodiment 2

[0071] Such as figure 2 As shown, the embodiment of the present invention provides a spare parts guarantee probability calculation device for lognormal general parts, including:

[0072] The probability matrix establishment module is used to establish and calculate the probability matrix dyPs, the element dyPs(i, j) in the matrix represents the probability of j-1 failures of the general parts of the i-th equipment, 1≤i≤N, 1≤j≤ S+2, N is the number of equipment equipped with log-normal general-purpose parts, S is the number of spare parts of log-normal general-purpose parts in the spare parts warehouse; the value of matrix element dyPs(i,j) is as follows:

[0073]

[0074] In the formula, Γ() is the gamma function, T i The planned working time for the i-th equipment of the lognormal general-purpose part within a guarantee period;

[0075] The spare parts support probability calculation module is used to sequentially calculate the probability distribution of the sum ...

Embodiment 3

[0077] An embodiment of the present invention provides a spare parts support probability calculation device for lognormal general-purpose parts, including a memory and a processor;

[0078] The memory is used to store computer software programs;

[0079] The processor is configured to read and execute the computer software program stored in the memory, so as to realize a method for calculating the spare parts guarantee probability of lognormal general-purpose parts as described in Embodiment 1 of the present invention.

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Abstract

The invention relates to a spare part guarantee probability calculation method and device for a logarithmic normal universal part, and belongs to the technical field of equipment spare part guarantee.The method comprises the following steps: establishing a probability matrix by utilizing the fault probability of each equipment universal part; selecting equipment for arranging general parts in columns as current equipment in sequence, sequentially calculating probability distribution conditions of the sum of faults of the general parts in other equipment by utilizing convolution operation, andfinally calculating spare part guarantee probability of the current equipment according to the probability distribution conditions of the sum of faults of the general parts in the other equipment. According to the method, the fault probability of the universal part in different devices is fully considered, the guarantee probability of the current device is calculated by using the fault probability of other devices, the overall demand of the universal part is planned, and resource waste is reduced while the sufficiency of spare part resources is met.

Description

technical field [0001] The invention relates to the technical field of equipment spare parts support, in particular to a method and device for calculating the probability of spare parts support for log-normal general-purpose parts. Background technique [0002] The logarithmic normal general-purpose part is a component unit whose life distribution obeys the logarithmic normal distribution, which is interchangeable in different types or the same type of equipment with different specifications, such as: helicopter rotary blades, aircraft structures, metal fatigue, motors Winding insulation, semiconductor devices, silicon transistors, germanium transistors, etc. The lifespan X of lognormal general-purpose parts obeys lognormal distribution and is denoted as X~Ln(μ,σ 2 ), where μ>0 is the logarithmic mean parameter, σ>0 is the logarithmic root variance parameter, and the density function of X is [0003] Due to the high versatility of common parts, after comprehensivel...

Claims

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Application Information

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IPC IPC(8): G06F30/20G06F17/18
CPCG06F17/18
Inventor 阮旻智肖剑波王俊龙李华
Owner NAVAL UNIV OF ENG PLA
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