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A Calculation Method of Spare Parts Requirements for Multiple Sets of Equipment

A calculation method and demand technology, applied in calculation, manufacturing calculation system, design optimization/simulation, etc., can solve the problem that the utilization efficiency of spare parts is not the maximum, etc.

Active Publication Date: 2021-08-31
NAVAL UNIV OF ENG PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] 2) The unit failure is a "soft failure", that is, when the performance of the unit continues to decline to a certain value, the unit can be identified as "faulty", but at this time the unit does not stop working, and its "fault" effect is the same as that of other units. The equipment is affected in a comprehensive way, and the faulty unit can only be found and repaired in the way of maintenance after the event
The advantage of this strategy is that the maintenance tasks can be carried out / completed as soon as possible, but the disadvantage is that the utilization of spare parts is not the greatest

Method used

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  • A Calculation Method of Spare Parts Requirements for Multiple Sets of Equipment
  • A Calculation Method of Spare Parts Requirements for Multiple Sets of Equipment
  • A Calculation Method of Spare Parts Requirements for Multiple Sets of Equipment

Examples

Experimental program
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Embodiment 1

[0072] There are 3 types of units in a certain type of equipment, the life of the first type of unit obeys the exponential distribution Exp(0.002), and the price is 100 yuan; the life of the second type of unit obeys the normal distribution N(600,130 2 ), the price is 150 yuan; the life of Type 3 unit obeys the Weibull distribution W(600,1.8), and the price is 200 yuan. There are 5 sets of this type of equipment, and the accumulated working time of the equipment is T=500h. These 5 pieces of equipment are about to be overhauled now. After the overhaul is completed, the number of intact equipment is N ok The probability P(N ok ≥4) greater than or equal to 0.85. Calculate the demand for spare parts required for each type of unit in this maintenance work.

[0073] The calculation steps are as follows:

[0074] Step S1, in a traversal manner, generate a description of all "Nz sets of equipment with a good number greater than or equal to N min ” The matrix Zok of the situation....

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Abstract

The present invention proposes a calculation method for the demand for spare parts of multiple sets of equipment to generate the number of "NZ sets of equipment intact among NZ sets of equipment than or equal to N min "The matrix of the situation, traversing the failure of each unit, initialize the spare parts plan, calculate the guarantee effect of the spare parts plan, judge, if P0≥p s , Calculate termination; if P0 <p s , Then traverse the candidate spare parts and calculate the corresponding marginal benefits; from all marginal benefits DV j Find the maximum number JM, traverse within the range of 1≤d ≤ND, and obtain the updated spare parts scheme.The "conservative" estimation results that can provide the "conservative" estimation of other maintenance strategies with high accuracy of the present invention.

Description

technical field [0001] The invention relates to the field of spare part requirement calculation, in particular to a method for calculating the spare part requirement of multiple sets of equipment. Background technique [0002] Accurately calculating the demand for spare parts can quantitatively describe the degree of support of equipment from the perspective of economic costs such as the corresponding spare parts procurement costs. [0003] Devices generally have a hierarchical structure. For example, equipment can be divided into: equipment, components, boards, components, etc. from the top level to the lower level. 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 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" distr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/18G06Q10/06G06Q10/00G06Q50/04
CPCG06F30/20G06F30/398G06F2119/04Y02P90/30
Inventor 李婧李华吴笛霄陈浩
Owner NAVAL UNIV OF ENG PLA
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