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Hypothesis testing method for sensitive parameters of fire work system

A technology of hypothesis testing and testing methods, applied in the fields of safety and storage period evaluation, and reliability of pyrotechnic systems, it can solve the problems of imprecise statements and accumulation of large sample sizes for a long time, and achieve the effect of accurate testing results.

Active Publication Date: 2021-01-26
CHUANNAN MACHINERY PLANT CHINA ASTRONAUTIC SCI &TECH GROUP CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0021](2)μ0 is usually obtained from a large sample size, which requires long-term accumulation of a large sample size. Generally, this item has not been carried out Work;
[0022](3) For the t-test of grouped samples in this standard, the sample size of the two groups of samples is equal by default, and the reason is explained as "the two groups before and after the test samples, or two groups of samples at different test times", this statement is not rigorous

Method used

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  • Hypothesis testing method for sensitive parameters of fire work system
  • Hypothesis testing method for sensitive parameters of fire work system
  • Hypothesis testing method for sensitive parameters of fire work system

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Embodiment 1

[0130] The pyrotechnic system sensitive parameter significance inspection method proposed by the present invention can be used for various pyrotechnic system sensitive parameter significance inspections. The specific implementation steps of the present invention will be described below in conjunction with the accompanying drawings:

[0131] 1. Select sensitive parameters

[0132] This embodiment is a kind of detonator, the function of which is to detonate a subordinate product, and its performance index is detonation time, and the unit is millisecond.

[0133] 2. Statistical historical sample data

[0134] The historical sample data of the same state of a detonator is counted, and the recorded information includes product batches, product serial numbers, product performance data (sensitive parameters), average value of sensitive parameter sample data, and standard deviation of sensitive parameter samples. See Table 2 for records.

[0135] Table 2 Igniter A historical sample ...

Embodiment 2

[0183] The pyrotechnic system sensitive parameter significance inspection method proposed by the present invention can be used for various pyrotechnic system sensitive parameter significance inspections. The specific implementation steps of the present invention will be described below in conjunction with the accompanying drawings:

[0184] 1. Select sensitive parameters

[0185] Igniter C needs to be evaluated for its storage period, and the selected sensitive parameter is the output burst pressure. The products in the state of natural storage for 12 years are used for the ignition test, and the output explosion pressure is tested; the accelerated storage test is carried out by the method stipulated in GJB736. Pressure, the acceleration time is equivalent to the natural storage time of 12 years. Carry out a significance test on the two sets of data. If the overall mean value of the sensitive parameter output burst pressure has no significant change, it means that the acceler...

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Abstract

The invention relates to a hypothesis testing method for sensitive parameters of a fire work system. The method comprises the following steps: (1) selecting the sensitive parameters of the fire work system; (2) counting historical sample data of sensitive parameters of the fire work system; (3) carrying out normality test and transformation on the historical sample data of the sensitive parametersof the initiating explosive system, so that the historical sample data of the sensitive parameters of the initiating explosive system and the to-be-tested sample data are in normal distribution; (4)when the number of historical sample data of the sensitive parameters of the fire work system is greater than or equal to a preset threshold, verifying significant changes by adopting a single normaltotal mean value t test method; and (5) when the historical sample data volume of the sensitive parameters of the fire work system is smaller than a preset threshold, verifying the significance changeby adopting a two-normal overall mean value t test method, and if the two groups of sensitive parameter samples do not have the significance change, verifying the significance change by adopting a two-normal overall variance F test method. According to the invention, more accurate inspection is realized.

Description

technical field [0001] The invention relates to a hypothesis testing method for sensitive parameters of a pyrotechnic system. The method can accurately judge whether the overall average value of the sensitive parameters of a pyrotechnic system has significant changes, and belongs to the technical field of pyrotechnic system reliability, safety and storage period evaluation. Background technique [0002] Hypothesis testing (hypothesis testing) is also known as "significance test". There are two kinds of assumptions: one is to test the hypothesis, or "null hypothesis", "null hypothesis" (null hypothesis), the symbol is H 0 ; One is the alternative hypothesis (alternative hypothesis), the symbol is H 1 . Both are assumptions about parameters or distribution characteristics made for the purpose of statistical inference. The steps of hypothesis testing include: establishment of hypothesis, determination of significance level, calculation of statistics, determination of probabil...

Claims

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Application Information

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IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 雷波杨叶周杨王成玲孟燕刚张影曾波李雅瑟
Owner CHUANNAN MACHINERY PLANT CHINA ASTRONAUTIC SCI &TECH GROUP CORP
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