考虑冲击与阶段备份的多阶段任务系统可靠性建模  

Reliability modeling of phased mission system considering shocks and phase backups

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作  者:李翔宇 黄洪钟 熊晓燕 LI Xiangyu;HUANG Hongzhong;XIONG Xiaoyan(School of Mechanical and Transportation Engineering,Taiyuan University of Technology,Taiyuan 030024,China;School of Mechanical and Electrical Engineering,University of Electronic Science and Technology of China,Chengdu 611731,China)

机构地区:[1]太原理工大学机械与运载工程学院,山西太原030024 [2]电子科技大学机械与电气工程学院,四川成都611731

出  处:《系统工程与电子技术》2023年第7期2280-2286,共7页Systems Engineering and Electronics

基  金:国家自然科学基金(72101173);山西省自然科学基金(20210302124442)资助课题。

摘  要:近年来,由于在航空航天、军事、核能等领域的广泛应用,多阶段任务系统(phased mission system,PMS)可靠性建模方法得到了广泛的关注。航天系统所包含的电子设备会由于自身的老化导致性能退化而失效,同时也会因为外界的随机冲击导致失效,严重影响系统可靠度。针对该问题,提出一种基于模块化方法的模型。首先,将冲击模型与半马尔可夫过程结合,计算受冲击影响的工作单元可靠度。然后,提出一种基于二元决策图(binary decision diagram,BDD)模型的方法,对同时考虑冲击与阶段备份的PMS进行可靠性建模。最后,以某型航天器中的推进子系统为例对所提方法进行说明,并应用蒙特卡罗方法进行验证,证明了所提方法的建模效率与准确性。In recent years,due to its widespread application in fields such as aerospace,military,and nuclear energy,the reliability modeling method of phased mission system(PMS)has received widespread attention.The electronic equipment contained in the aerospace system may fail due to its own aging,leading to performance degradation,and may also fail due to random shocks,seriously affecting system reliability.A model based on modular methods is proposed to address this issue.Firstly,the impact model is combined with the semi-Markov process(SMP)to calculate the reliability of the work unit affected by the impact.Then,a method based on binary decision diagram(BDD)model is proposed to model the reliability of PMS that considers both impact and phase backup.Finally,taking the propulsion subsystem of a certain type of spacecraft as an example,the proposed method is explained and validated using the Monte Carlo method,demonstrating the modeling efficiency and accuracy of the proposed method.

关 键 词:多阶段任务系统 可靠性建模 随机冲击 阶段备份 半马尔可夫过程 

分 类 号:TB114.3[理学—概率论与数理统计]

 

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