Reliability evaluation method for using weapons by order

A technology of reliability and equipment, applied in the direction of instruments, special data processing applications, electrical digital data processing, etc., can solve the problems that the distribution function of continuous variables cannot accurately describe the frequency variable, the theory is incomplete, and the physical meaning does not match.

Pending Publication Date: 2019-02-22
中国人民解放军92942部队
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AI Technical Summary

Problems solved by technology

Therefore, there are three deficiencies in current engineering using methods based on exponential distribution to evaluate the reliability of use-by-use weapons and equipment. Non-continuous failure frequency variable; second, the physical meaning does not match, the probability meaning contained in the exponential distribution does not match the probability events of the use of weapons and equipment failures; third, the calculation results are inaccurate, due to the incompleteness of the theory Does not match the physical meaning, the evaluation results given by the method based on the exponential distribution assumption are approximate results

Method used

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  • Reliability evaluation method for using weapons by order
  • Reliability evaluation method for using weapons by order
  • Reliability evaluation method for using weapons by order

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Embodiment 1

[0042] see figure 1 , which is a flow chart of a reliability evaluation method for use-by-use weaponry provided in this embodiment. A reliability assessment method for use-by-use weapons and equipment, comprising the following steps:

[0043] S1: Obtain point estimates of reliability

[0044]

[0045] in, is the probability that the weapon will fail when it is used n times, is the maximum likelihood estimate of the probability V of the armament being used without failure in a single use.

[0046] Further, the maximum likelihood estimation value of the probability V of the non-failure of the weapon equipment in a single use The way to get it is:

[0047] S101: Construct the maximum likelihood function L(V):

[0048] L(V)=V (N-Z) W Z (2)

[0049] Among them, N is the total number of effective reliability tests conducted by the weaponry, Z is the cumulative number of failures of the weaponry in N reliability tests, and V is the number of failures of the weaponry...

Embodiment 2

[0102] Based on the above embodiments, this embodiment evaluates the reliability of the catapult of a certain aircraft carrier (example needs, not real data).

[0103] Step 1. Analyze and process reliability test data

[0104] ①Assume that a carrier-based aircraft catapult has carried out a total of N=2000 reliability tests, and Z=5 failures occurred during the period (required for examples, not real data).

[0105] ② The total number of tests corresponding to the 1st to 5th failures is shown in Table 3:

[0106] table 3

[0107] Sequence of failure

1

2

3

4

5

total number of trials

F 1 ＝438

F 2 ＝981

F 3 ＝1415

F 4 ＝1792

F 5 ＝1996

[0108] According to the above table, the 1st to 5th failure events are counted as probability events A 1 ,A 2 ,...,A 5 , and calculate the number of continuous tests without failure before each failure, as shown in Table 4:

[0109] Table 4

[0110]

[0111] Step 2. Establish a probability ...

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Abstract

The present invention provides a reliability evaluation method for using weapons by order, the calculation method of point estimate of reliability, one-sided lower confidence limit of reliability, thelower and upper limits of the two-sided confidence intervals of the reliability is given, point estimates, one-sided confidence lower limit, the lower and upper limits of the two-sided confidence intervals can be obtained, the reliability of using weapons by order can be fully evaluated, and the problems that the reliability of using weapons by order such as shipboard aircraft ejectors cannot bemodeled accurately and the physical meaning is not matched. It can establish the complete reliability evaluation model of the weapons and equipments used once, and improve the accuracy of the evaluation results.

Description

technical field [0001] The invention belongs to the technical field of weapon equipment reliability engineering, and in particular relates to a reliability evaluation method for use-by-use weapon equipment. Background technique [0002] For weapons and equipment that are used in turn, the existing solution is to ignore the phenomenon that the failure probability distribution is discretized due to the discreteness of the equipment use process, and still follow the standards such as GJB 899A-2009 "Reliability Identification and Acceptance Test", The method given in the literature based on the assumption of exponential distribution calculates the reliability of use-by-use weaponry. [0003] The exponential distribution is a continuous probability distribution. Generally, the failure time of electronic products (such as naval computer, marine communication equipment, etc.) and large complex repairable equipment (such as ship power system, power system, etc.) that work continuou...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20G06F2111/10Y02P90/30
Inventor 程红伟王岩磊黄金娥徐东张衍张扬刘隆波
Owner 中国人民解放军92942部队
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