常用航天机构可靠性测试与评估指标体系研究

Research on Indicator System of Reliability Test and Evaluation for Space Mechanisms

该研究从表征空间机构可靠性的特征量的角度出发,评估空间机构的可靠性。在常用航天机构产品分析中,并不对每件产品进行FMEA或FTA分析,而是对每种类型的机构进行故障模式及其可靠性影响因素分析,旨在找出可能的故障模式及相应的可靠性影响因素,为提炼共性故障模式、基础的可靠性影响因素奠定基础。根据航天机构的特点与功能要求,该研究选取压紧释放机构、天线指向机构、太阳翼铰链和行星减速器四种常用航天机构为研究对象开展了可靠性试验基础研究。结合任务剖面和服役环境,主要研究了各机构的方案构型、开展了故障模式及影响分析,建立了各类机构的可靠性测试与评估指标体系,确定了驱动机构可靠性试验方法。常用航天机构可靠性测试与评估指标体系建立为研究的后续工作奠定了理论基础。

According to structure and function, ordinary space mechanisms including press- release mechanism, antenna directing mechanism, solar panel hinge and planetary reducer are studied. Based on the mission and service environment, construction and failuremodel effect analysis（FMEA） are introduced and analyzed. The system of test and evaluation indicators is established. Reliability test procedure for drive mechanism is described. The establishment of the indictor system for ordinary space mechanisms has founded the theoretical basis for subsequent research on this subject.