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

A calculation method and technology of demand, applied in the direction of calculation, data processing application, forecasting, etc.

Active Publication Date: 2021-07-16
NAVAL UNIV OF ENG PLA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0009] 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

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

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Embodiment 1

[0046] 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; Type 3 unit life 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.

[0047] The calculation steps are as follows:

[0048] Step S1, traverse and calculate the failure degree Pf of each type of unit d , 1≤d≤Nd, d is the serial number of the unit type.

[0049] Failure degree Pf of type 1 exponen...

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Abstract

The invention proposes a method for calculating the demand for spare parts of multiple sets of equipment. By traversing and calculating the failure degree of various types of units, the spare parts scheme is initialized and its guarantee effect is calculated. If P0≥P s , the calculation is terminated; if P0<P s , then traverse to generate candidate spare parts solutions, and calculate the corresponding marginal benefits, from all marginal benefits dV j Find the sequence number Jm corresponding to the maximum value in the , and traverse it within the range of 1≤d≤Nd to obtain the updated spare parts plan, and obtain the final result through cyclic traversal calculation. The method of the invention is highly accurate. Under the condition of the same spare parts demand, the spare parts guarantee effect under the joint repair and maintenance strategy can be considered as the upper limit result of all other maintenance strategies. Therefore, when there is no spare parts guarantee effect under other maintenance strategies When the method is accurately calculated, the method for accurately calculating the guarantee effect of spare parts under the combined repair and maintenance strategy included in the present invention can provide an "optimistic" estimation result of the guarantee effect for other maintenance strategies.

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] 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" distribution type, such as the common exponential distribution, gamma distribution, normal distribution, Weibull distribution etc. [0003] Generally speaking, the life of electronic components and other units obeys the ex...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06Q10/04G06Q10/06
CPCG06Q10/04G06Q10/0639
Inventor 李婧李华吴笛霄陈浩
Owner NAVAL UNIV OF ENG PLA
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