摘要
火工装置在航天领域有着广泛的应用,是航天关键产品,本身具有价格昂贵、高可靠性(多数要求达到0.9999以上)等特点。火工装置工作的成败,关系着人员的安危和任务的完成。产品在使用前,必须要通过试验来评估可靠性。因此对火工装置可靠性评估方法的研究有着重要的实际工程意义。针对冗余设计航天用火工装置,结合应力-强度等可靠性相关理论,采用强化试验思想提出了冗余设计航天火工装置的可靠性试验评估原理和可靠性试验验证方案。根据提出的原理及验证方案,首次通过试验评估并验证了冗余设计火工装置——某拔销器的功能可靠性,同时两种加严方式的试验也实现了相互验证,从而证明了提出的可靠性评估原理和试验验证方案的正确性及有效性,解决了小子样评估冗余类航天火工装置高可靠性的工程难题。
Pyrotechnic devices are widely used in the aerospace field and have characteristics of high value and high reliability requirements （ the majority of the requirements is 0.9999 above）. The safety of the staff and the accomplishment of the task are related to the reliability of pyrotechnic devices. Before the pyrotechnic devices are used in the aerospace field, they must be assessed by tests for the reliability. Therefore, research on reliability assessment of the pyrotechnic devices is practically meaningful. The reliability test evaluation principle and verification concept of redundant design pyrotechnic devices used in aerospace is put forward by combining the stress-strength reliability theory and using the strengthened cogitative test for the redundant design pyrotechnic devices used in aerospace. Based on the theory and design methods mentioned above, the testing methods are used to assess and check the functional reliability of the redundant designed pyrotechnic devices such as some pin pullers for the first time. Meanwhile two different hardened testing methods are used to mutually prove correctness and reasonableness of reliability assessment principle and design methods. And also the engineering problem of assessing the redundant design pyrotechnic devices for aerospace by small samples is solved.
出处
《宇航学报》
EI
CAS
CSCD
北大核心
2013年第7期1021-1026,共6页
Journal of Astronautics
基金
民用航天科研预先研究项目(C4220062206)
关键词
冗余
火工装置
可靠性评估
实例评估
Redundance
Pyrotechnic device
Reliability assessment
Instance assessment
