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A Calculation Method of Spare Parts Requirements for Gamma Type Series Parts

A calculation method and technology of demand, which can be used in calculation, complex mathematical operations, data processing applications, etc., and can solve the problems of low accuracy of spare parts demand results, uncertain guarantee level, and excessive guarantee.

Active Publication Date: 2021-11-02
NAVAL UNIV OF ENG PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The results of spare parts demand calculated by this method are not only inaccurate, but also the degree of assurance is uncertain, leading to over-insurance in some cases and under-insurance in others

Method used

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  • A Calculation Method of Spare Parts Requirements for Gamma Type Series Parts
  • A Calculation Method of Spare Parts Requirements for Gamma Type Series Parts
  • A Calculation Method of Spare Parts Requirements for Gamma Type Series Parts

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Embodiment 1

[0047] Taking the number of installed units N=3 and the demand for spare parts S=3 as an example, if the guarantee task is successful, the total number of spare parts used in each unit location is shown in Table 1:

[0048] Table 1 Quantity of spare parts used in each unit location

[0049]

[0050]

[0051]For each row in the table, the probability of the event occurring can be calculated. For example, for the row data [1 0 2] in the table, its physical meaning is: all 3 unit positions are guaranteed to succeed, 1 spare part is used in No. 1 cell position, no spare part is used in No. 2 cell position, and No. 3 cell position is used. Using 2 spare parts, the probability of this event occurring is equal to P(N s =1)×P(N s =0)×P(N s =2), N s The physical meaning of is the number of spare parts used at each unit location during the sustainment mission. Add the probabilities of events in each row in Table 1 to get the probability when the total number of spare parts us...

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Abstract

The present invention proposes a method for calculating the demand for spare parts of gamma-type series components, which traverses and calculates the situation matrix Sall of spare parts used by units at N positions, and for each row vector Sall(m;) of the matrix Sall, 1≤m≤r , calculate the corresponding probability P1 m , calculate the spare parts guarantee probability P ok , will guarantee the probability P ok Compare with the guarantee probability threshold Ps until P ok ≥Ps, then j is the demand for spare parts, and the calculation is terminated. The guarantee probability results calculated by the method of the present invention and the simulation method are compared, and the guarantee probability results obtained by the two methods are highly consistent, showing the accuracy of the method of the present invention; , when you don’t know what kind of reliable connection relationship between the N same-type gamma-type units inside the equipment, you can also give a spare parts plan with an extremely "safe" guarantee effect based on this.

Description

technical field [0001] The invention relates to the field of spare parts demand calculation, in particular to a spare parts demand calculation method of a gamma type series component. Background technique [0002] Devices generally have a hierarchical structure. For example, equipment can be divided into equipment, components, boards, components, etc. from the top layer to the lower layer. Equipment is composed of various types of components, each component is composed of various panels, and so on. In this article, we refer to the bottom-most replaceable / repairable product as a unit. Since the unit is at the bottom, its composition is relatively simple and pure, so the distribution type of its life is closer to the theoretical "standard" distribution type, such as the common exponential distribution, gamma distribution, normal distribution, Weibull distribution, etc. [0003] In equipment, multiple units of the same type are often installed, that is, the number N of inst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/18G06Q10/06
CPCG06F17/18G06Q10/06315
Inventor 张光宇任海东彭英武李华
Owner NAVAL UNIV OF ENG PLA
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