FAST促动器可靠性增长

doi:10.3901/JME.2025.03.251

机械工程学报 ›› 2025, Vol. 61 ›› Issue (3): 251-258.doi: 10.3901/JME.2025.03.251

• 机器人及机构学 • 上一篇

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FAST促动器可靠性增长

雷政^1,2,3, 姜鹏^1,2,3, 姚蕊^1,2,3, 王勇^2,3

1. 中国科学院国家天文台北京 100101;
2. 贵州射电天文台贵阳 550025;
3. 中国科学院FAST重点实验室北京 100101

收稿日期:2024-07-15 修回日期:2024-11-05 发布日期:2025-03-12
作者简介:雷政，男，1988年出生，博士，高级工程师，硕士研究生导师。主要研究方向为可靠性工程、天文技术与方法。E-mail:leizheng@nao.cas.cn
基金资助:
国家自然科学基金(12203075,12173054)、贵州省科技计划(黔科合支撑[2023]一般378、黔科合支撑[2023]一般351)和中国科学院青年创新促进会资助项目。

Reliability Growth of FAST Actuator

LEI Zheng^1,2,3, JIANG Peng^1,2,3, YAO Rui^1,2,3, WANG Yong^2,3

1. National Astronomical Observatory, Chinese Academy of Sciences, Beijing 100101;
2. Guizhou Radio Astronomical Observatory, Guiyang 550025;
3. Key Laboratory of FAST, Chinese Academy of Sciences, Beijing 100101

Received:2024-07-15 Revised:2024-11-05 Published:2025-03-12

摘要/Abstract

摘要： 针对FAST促动器可靠性不足，严重影响望远镜观测的问题，从自净化功能、驱动系统、环境防护、状态监测等方面进行优化，完成整机可靠性增长方案设计，并提出多台异步纠正的加速可靠性增长试验方案。对可靠性增长方案的平均无故障工作时间(Mean time between failures, MTBF)进行理论估算，其值为81 536 h，相比2019年增长将超过12倍。采用3台样机进行连续可靠性增长试验，并通过跟踪与往复连续交替运行模式及增加负载的方法进行加速。试验从2019年5月至2022年8月，期间除3#样机累计有3次B类故障外，其余2台样机均无故障，最后采用时间截尾方式结束。利用AMSAA模型对试验数据进行分析，3台样机的平均当量MTBF值为80 061 h，与理论计算数值非常接近，验证了该方案可靠性增长的有效性。对完成全部升级后的一年运行情况进行统计分析，FAST促动器平均故障率为0.35台/天，相比升级前降低了12.2倍，其降低幅度与可靠性增长理论分析和试验结果基本吻合，再次验证了该可靠性增长方案及可靠性增长加速试验方案的有效性。通过优化设计、理论分析、试验验证与工程实践相结合的综合研究方法，实现了FAST促动器可靠性的大幅增长，使促动器群系统可靠度提升了一个数量级，可为其他类似研究提供参考。

关键词: FAST促动器, 可靠性增长, AMSAA模型, 群系统

Abstract: The FAST observation efficiency was affected seriously by the low reliability of the actuator. To solve the problem, the actuator reliability growth scheme which included the self-purification function, drive system, environmental protection and condition monitoring is proposed. And the accelerated reliability growth test method for multiple items asynchronous corrective actions of actuator is designed. According to the reliability analysis, the mean time between failures (MTBF) predicted value of the reliability growth scheme for actuator is 81 536 h, and the value is more than 12 times that of in 2019. Three prototypes are used for the reliability growth test, and the accelerated reliability growth testing method which tracking and reciprocating continuous alternating working mode and increase the load scheme are designed. The test lasted from May 2019 to August 2022, and prototypes are failure-free working except for 3# had three times B failure. The reliability test is finished with the time truncation mode. And the test data is analyzed by the AMSAA model, and the test predicted result of MTBF is 80 061 h. The MTBF results of design and test agree with each other well, and the effectively of actuator reliability growth solution is proved. Perform statistical analysis on the one-year working data after completing all upgrades. And the average failure rate of the actuators in last year is 0.35 units a day, and the failure rate has been decreased by 12.2 times. This numerical values are consistent with the theoretical analysis and test results, and the effectiveness of the reliability growth scheme and the reliability accelerated test method is supported again. FAST actuator reliability growth has been achieved greatly by the research method of synthesizes the theoretical analysis, experimental verification and engineering practice, and the reliability of the actuator group system has increased by an order of magnitude, which can provide reference for other similar studies.

Key words: actuators of FAST, reliability growth, AMSAA model, group system

中图分类号:

TH137

雷政, 姜鹏, 姚蕊, 王勇. FAST促动器可靠性增长[J]. 机械工程学报, 2025, 61(3): 251-258.

LEI Zheng, JIANG Peng, YAO Rui, WANG Yong. Reliability Growth of FAST Actuator[J]. Journal of Mechanical Engineering, 2025, 61(3): 251-258.

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FAST促动器可靠性增长

Reliability Growth of FAST Actuator

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