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A Calculation Method of Spare Parts Requirements for Normal Series Parts

A calculation method and technology of demand, applied in the direction of calculation, data processing applications, instruments, etc., can solve the problems of low accuracy, excessive guarantee and insufficient guarantee of spare parts demand results.

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

AI Technical Summary

Problems solved by technology

The results of spare parts demand calculated by this method are not only inaccurate, but also the level of assurance is uncertain, which may lead 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 Normal Series Parts
  • A Calculation Method of Spare Parts Requirements for Normal Series Parts
  • A Calculation Method of Spare Parts Requirements for Normal Series Parts

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Experimental program
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Embodiment 1

[0043] Taking the number of installed machines N = 3 and the demand for spare parts S = 3 as an example, if the guarantee task is successful, the quantity of spare parts used by each unit location is shown in Table 1:

[0044] Table 1 Quantity of spare parts used in each unit position

[0045]

[0046] For each row in the table, the probability of that 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 success, 1 spare part is used in unit 1 position, no spare part is used in unit 2 position, and unit 3 position With 2 spare parts used, the probability of this event is equal to P(N s =1)×P(N s =0)×P(N s = 2), N sThe physical meaning of is the quantity of spare parts used at each unit location during the sustainment mission. Add the probabilities of each row of events in Table 1 to get the probability when the total number of spare parts used is 3.

[0047] Specifically, fo...

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Abstract

The present invention proposes a method for calculating the demand for spare parts of normal type serial parts, traverse and calculate the spare part usage matrix Sall of N positions, and for each row vector Sall(m,:) of the matrix Sall, 1≤m≤r, Calculate the probability P1 of its guaranteed success m , calculate the spare parts guarantee probability P ok , will guarantee the probability P ok and guarantee probability threshold P s are compared until P ok ≥P s , 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, which shows the accuracy of the method of the present invention; the method of the present invention can not only calculate the demand for spare parts of normal type serial parts , when you do not know what kind of reliability connection relationship between the N normal units of the same type 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 method for calculating the spare parts demand of normal series components. 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 bottom layer. Equipment is composed of various types of components, each of which is composed of various types of panels, and so on. In this article, we refer to the lowest replaceable / repairable product as a unit. Since the unit is at the bottom layer, its composition is relatively purer and purer, 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 the equipment, there are often multiple units of the same type installed, that i...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/06
CPCG06Q10/06315
Inventor 阮旻智邵松世王俊龙莫小杰李华
Owner NAVAL UNIV OF ENG PLA
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