Method for evaluating ignition reliability of initiating explosive device based on margin
A technology of pyrotechnics and reliability, which is applied in the field of reliability evaluation of pyrotechnics based on margin, can solve problems such as bias, adverse effects on the accuracy of pyrotechnics, and adverse effects on the accuracy of estimated parameters, so as to improve the accuracy sexual effect
Pending Publication Date: 2022-06-07
BEIJING INSTITUTE OF TECHNOLOGYGY
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The mean value estimates given by the existing measurement methods are basically unbiased and have high precision, but the standard deviation estimates are biased, which will adversely affect the accuracy of the estimated parameters, thus affecting the evaluation of pyrotechnic products. The accuracy of the
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[0052] The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings, but the protection scope of the present invention is not limited to the following.
[0053] like figure 1 As shown in the figure, a margin-based method for assessing the ignition reliability of an explosive device includes the following steps:
[0054] S1. Predetermine two alternatives:
[0055] First, determine the stimulus amount of the low-point test according to the sample size of the low-point test agreed by the manufacturer and the user;
[0056] Second, determine the sample size of the low-point test according to the test margin agreed by the manufacturer and the user;
[0057] S2. Obtain the average sensitivity of the product through the measurement method;
[0058]S3. According to the requirements of the reliability index, calculate the allowable maximum value σ of the standard deviation estimate H ;
[0059] S4. Select any on...
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The invention discloses a margin-based initiating explosive device ignition reliability evaluation method. The method comprises the following steps: S1, pre-determining two alternative schemes: 1, determining a low-point test stimulation amount according to low-point test sample sizes agreed by a producer and a user; 2, determining a low-point test sample size according to test margins agreed by a producer and a user; s2, obtaining a sensitivity mean value of the product through a metering method; s3, calculating a maximum value sigma H allowed by standard deviation estimation according to a reliability index requirement; s4, any alternative scheme is selected, and relevant parameters (nL, xL) of the test scheme are obtained; and S5, performing an ignition test according to the determined related parameters (nL, xL) of the test scheme. Based on the characteristics of the sensitivity distribution function of the initiating explosive device, the characteristics of reliability parameter estimation of a metering method are combined, the test data of the counting method are comprehensively utilized, the reliability evaluation and verification method of the initiating explosive device based on the margin is provided, and the evaluation accuracy is effectively improved.
Description
technical field [0001] The present invention relates to the reliability evaluation of an explosive, in particular to a method for evaluating the ignition reliability of an explosive based on a margin. Background technique [0002] Over the past decades, many methods have been developed in the field of reliability assessment of pyrotechnics at home and abroad, which are mainly divided into three categories: counting method, measurement method, and comprehensive assessment method of measurement and counting. The counting method test is simple, but the sample size is large, and the estimation is conservative. If you want to evaluate the product with γ=0.95 and R=0.999, 2996 products should be carried out under the condition of zero failure. [0003] Such a high sample size is unbearable in terms of test cycle and cost. The verification of this high reliability index in engineering is generally to first use the counting method to evaluate to 0.99, and then to judge the reliabil...
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IPC IPC(8): G06F30/20G06F17/18G06F119/02
CPCG06F30/20G06F17/18G06F2119/02Y02P90/30
Inventor 穆慧娜马文涛伊枭剑温玉全刘炜崔宇航李晓刚
Owner BEIJING INSTITUTE OF TECHNOLOGYGY