加速度计贮存试验及寿命评估方法研究

doi:10.3969/j.issn.1000-1093.2020.06.020

兵工学报 ›› 2020, Vol. 41 ›› Issue (6): 1227-1235.doi: 10.3969/j.issn.1000-1093.2020.06.020

加速度计贮存试验及寿命评估方法研究

赵晓东^1,2，穆希辉²

（1.陆军工程大学石家庄校区弹药工程系，河北石家庄 050003；2.32181部队，河北石家庄 050003）

收稿日期:2019-06-17 修回日期:2019-06-17 上线日期:2020-08-07
通讯作者: 穆希辉（1963—），男，研究员，博士生导师 E-mail:mxh@vip163.com
作者简介:赵晓东（1993—），男，博士研究生。E-mail：307794209@qq.com
基金资助:
国家自然科学基金项目（61471385）

Storage Life Evaluation of Accelerometer Based on Accelerator Factor Coefficient of Variation

ZHAO Xiaodong^1,2, MU Xihui²

（1.Department of Ammunition Engineering, Shijiazhuang Campus, Army Engineering University, Shijiazhuang 050003, Hebei, China; 2.Unit 32181 of PLA, Shijiazhuang 050003, Hebei, China)

Received:2019-06-17 Revised:2019-06-17 Online:2020-08-07

摘要/Abstract

摘要： 针对长期贮存后加速度计寿命难以评估的问题，提出一种综合利用加速试验数据与自然贮存试验数据的评估方法。采用极小卡方估计和拟合优度检验，处理加速度计的自然贮存数据，得到其可能服从的4种寿命分布函数，确定加速度计寿命分布形式为威布尔分布和Ⅰ型极大值分布；基于加速度计的先验信息，设计并开展加速度计的步进加速寿命试验，获得加速度计的加速失效数据；在威布尔分布和I型极大值分布假设下，依据加速失效数据估计加速度计寿命分布模型参数，采取加速因子变异系数的方法，选定Ⅰ型极大值分布为加速度计的寿命分布函数，得出常规应力水平下可靠度0.90和0.95的寿命分别为14.917 6 a和10.052 4 a. 通过对比标准贮存环境中和寿命分布模型中加速度计的失效比率，验证了综合利用两种试验数据评估加速度计寿命方法的有效性。

关键词: 加速度计, 加速因子变异系数, 贮存寿命, 加速试验, 自然贮存试验

Abstract: Aiming at the problem that the life of accelerometers is difficult to evaluate after long-term storage, an evaluation method that comprehensively uses accelerated test data and natural storage test data was proposed. The minimum Chi-square estimation and goodness-of-fit test was used, the accelerometer's natural storage data was processed to obtain the four life distribution functions that it may obey, and the accelerometer life distribution was determined as Weibull distribution and type Ⅰ maximum distribution; With reference to the a priori information of the accelerometer, a step-by-step acceleration life test of the accelerometer is designed and carried out to obtain acceleration failure data of the accelerometer; under the assumptions of Weibull distribution and type Ⅰ maximum value distribution, the parameters of the accelerometer life distribution model are estimated based on accelerated failure data, and the method of acceleration factor variation coefficient is used to select the type Ⅰ maximum value distribution as the life distribution function of the accelerometer. The lifespan of reliability 0.90 and 0.95 under conventional stress level is 14.917 6 a and 10.052 4 a, respectively. By comparing the failure rate of accelerometers in the standard storage environment and the life distribution model, the effectiveness of using two test data to evaluate the lifespan of the accelerometer is verified. Key

Key words: accelerometer, accelerationfactorcoefficientofvariation, storagelife, acceleratedtest, naturalstoragetest

中图分类号:

TJ760.6⁺23

赵晓东，穆希辉. 加速度计贮存试验及寿命评估方法研究[J]. 兵工学报, 2020, 41(6): 1227-1235.

ZHAO Xiaodong, MU Xihui. Storage Life Evaluation of Accelerometer Based on Accelerator Factor Coefficient of Variation[J]. Acta Armamentarii, 2020, 41(6): 1227-1235.

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加速度计贮存试验及寿命评估方法研究

Storage Life Evaluation of Accelerometer Based on Accelerator Factor Coefficient of Variation

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