Design and evaluation method of a detector structure high overload tightening test

A technology of test design and detectors, which is applied in the fields of instruments, calculations, and special data processing applications, etc., can solve the problems that there is no comprehensive reliability verification scheme specifically proposed, and there are few researches on the reliability of bomb detector structures.

Active Publication Date: 2018-03-16
BEIHANG UNIV
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Problems solved by technology

However, if the counting method is used to evaluate the reliability of success or failure products, according to GB5080.5-1985-T "Verification Test Plan for the Success Rate of Equipment Reliability Test", the confidence level is 0.9 or 0.95, and the reliability requirement is higher than 0.999 When testing 2303 rounds or 2996 rounds, this is unacceptable to the developer and tester, so it is urgent to find an evaluation method to reduce the sample
[0003] In recent years, there have been few researches on the reliability of the missile detector structure, and no specific comprehensive verification scheme for the reliability of the test samples has been proposed.

Method used

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  • Design and evaluation method of a detector structure high overload tightening test
  • Design and evaluation method of a detector structure high overload tightening test
  • Design and evaluation method of a detector structure high overload tightening test

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Experimental program
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Embodiment Construction

[0096] The present invention will be further described in detail below in conjunction with examples.

[0097] See figure 1 , a method for designing and evaluating a detector structure high overload tightening test of the present invention, which is realized through the following steps:

[0098] Step 1: Estimate the coefficient of variation

[0099] If the mean and variance of strength and stress are measured for 20 detector structures, it is assumed that the measured mean and variance are shown in the following table:

[0100] Table 2 Measured value of stress intensity

[0101] category

Average (×1000g)

Standard deviation (×1000g)

Coefficient of variation

sample size

stress

30

4.5

0.15

10

strength

50

5.0

0.1

10

[0102] Step 2: Calculate the test sample size under the condition of constant tightening

[0103] If 1-α=0.9, the reliability index is required to reach R L =0.999, calculate formula (11), obtain...

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Abstract

A design and evaluation method for a high-overload tightening test of a detector structure, which has five major steps: Step 1: Definition of tightening coefficient, variation coefficient, and survival coefficient; Step 2: Determination of the above-mentioned coefficients; Step 3: Establishment of static Stress-strength interference model; Step 4: Calculate the test sample size under constant tightening conditions; Step 5: Calculate the test sample size under variable tightening conditions. The principle and calculation process of the invention are simple and easy to understand, easy to realize engineering application, and have great economic value and broad application prospects in the technical field of structural reliability of bomb detectors.

Description

technical field [0001] The invention relates to a design and evaluation method for a high overload tightening test of a detector structure, which is aimed at a certain type of bomb detector structure whose strength characteristic parameters of detector products obey a normal distribution, based on the "stress-strength" interference model, research A reliability statistical verification scheme of the high overload stress test is established. The success-or-failure test of the detector structure is carried out in a harsher environment than the actual conditions, aiming to solve the problem that the general success-or-failure statistical method cannot be used to evaluate its reliability in the case of small samples. The invention belongs to the technical field of structural reliability of bomb detectors. Background technique [0002] The present invention is mainly aimed at the bomb detector structure, which plays an irreplaceable role in long-range strike and accurate strike ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F19/00
Inventor 马小兵章健淳贾一桢
Owner BEIHANG UNIV
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