Reliability Analysis of Ion Thruster Considering Unexpected Electric Breakdown
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摘要: 针对离子推力器服役过程中的非预期电击穿对可靠性的影响问题，首先进行了非预期电击穿的失效影响及综合风险评估，然后结合非预期电击穿导致的突发失效特征建立了基于δ冲击模型的离子推力器可靠性评估模型，最后以20 cm Xe离子推力器为例，在收集地面试验历史数据的基础上计算了考虑非预期电击穿的离子推力器可靠度随服役时间的关系。另外，综合考虑了由于栅极系统性能退化导致的退化型失效和由于非预期电击穿导致的突发型失效共存的情形，对离子推力器的整机可靠性评估进行了分析讨论。Abstract: Aiming at the impact of unexpected electric breakdown on the reliability of ion thruster in service,firstly,the failure impact and comprehensive risk assessment of unexpected electric breakdown are carried out,and then combined with the sudden failure characteristics caused by unexpected electric breakdown,a reliability assessment model of ion thruster based on impact model is established.Finally,taking the 20 cm Xe ion thruster as an example,the relationship between the reliability of the ion thruster and the service time considering the unexpected electric breakdown is calculated on the basis of collecting the historical data of the ground test.In addition,the coexistence of degraded failure caused by grid system performance degradation and sudden failure caused by unexpected electric breakdown is comprehensively considered,and the overall reliability of ion thruster is analyzed and discussed.
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Keywords:
- unexpected electric breakdown /
- shock models /
- ion thruster /
- reliability
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[1] 张天平.离子电推进技术[M].上海:科学出版社,2020. [2] LI J X,WANG Z H,ZHANG Y B,et al.Remaining useful life prediction and reliability analysis for an individual ion thruster[J].Journal of Propulsion & Power,2016,32(4):1-10.
[3] 林逢春,王宗仁,耿海,等.氙离子推力器寿命试验与可靠性评估方法[J].质量与可靠性,2018(5):17-20. [4] 贾艳辉,张天平,李小平.离子推力器加速栅寿命的概率性分布和可靠性预测[J].真空与低温,2011,17(2):75-79. [5] 李军星,张勇波,傅惠民,等.离子推力器极少数据可靠性评估方法[J].航空动力学报,2015,30(10):2352-2356. [6] 袁容.基于性能退化分析的可靠性方法研究[D].成都:电子科技大学,2015. [7] 张雪儿,张天平,李得天,等.离子推力器非预期电击穿特性及其主要影响因素对比研究[J].航天器环境工程,2021,38(1):63-70. [8] LIZ,KONG X.Life behavior of δ-shock model[J].Statistics & Probability Letters,2007,77(6):577-587.
[9] 张天平,张雪儿,蒲彦旭,等.离子推力器非预期电击穿的主要诱发因素及机制[J].真空与低温,2021,27(1):1-11. [10] YIM J T.Update of the NEXT ion thruster service life assessment with post-test correlation to the long-duration test[R].IEPC2017-061,2017.
[11] 李昊.基于随机过程和竞争失效理论的可靠性建模方法[D].兰州:兰州理工大学,2017. [12] 邹慧鹏.有限区间上的齐次与非齐次泊松过程研究[D].重庆:重庆师范大学,2012. [13] 刘晓娟.基于多失效模式的复杂系统可靠性分析研究[D].南京:南京航空航天大学,2017. [14] 孙富强,李艳宏,程圆圆.考虑冲击韧性的退化-冲击相依竞争失效建模[J].北京航空航天大学学报,2020,46(12):2195-2202. [15] WANGZ,HUANGH Z,LIY,etal.An approach to reliability assessment under degradation and shock process[J].IEEE Transactions on Reliability,2011,60(4):852-863.
[16] 刘颖,刘冬雪,马瑶.不确定环境下的致命冲击模型[J].天津科技大学学报,2019,34(2):75-80. [17] 成国庆,李玲,柳炳祥,等.多阈值故障的δ-冲击模型最优维修更换策略[J].应用数学,2013,26(1):165-171. [18] 中华人民共和国机械电子工业部,中国电子技术标准化研究所,中国科学院计算中心.寿命试验用表简单线性无偏估计用表(极值分布,威布尔分布):SJ/T 11100-1996[S].北京:国家技术监督局,1996.
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