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| 一种基于元学习的大口径射电望远镜俯仰轴承故障辨识方法研究 | |
| Alternative Title | Research on Fault Identification Method of Elevation Bearing for Large Aperture Radio Telescope Based on Meta Learning |
朱金浩1,2; 许谦1,3,4 ; 薛飞1,2; 何飞龙1,2; 梁娟1,2; 许多祥1,2
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| 2024-05-01 | |
| Source Publication | 天文学报
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| ISSN | 0001-5245 |
| Volume | 65Issue:3Pages:84-93 |
| Contribution Rank | 1 |
| Abstract | 在经过长期运行后大口径射电望远镜俯仰轴会出现微小扭曲,滚动轴承作为承载俯仰轴的核心部件,也会因长期承受交变载荷增加疲劳风险,导致轴承寿命以及望远镜指向精度的下降,极大影响望远镜的性能.以俯仰轴承为研究对象,开展故障辨识方法研究,可为望远镜天线的高性能运行提供重要支撑.为实现在有限数据和复杂工作条件下准确地辨识俯仰轴承故障,提出了一种小样本条件下基于元学习的故障辨识方法(Few-shot Meta-learning Fault Identification, FMFI).首先将不同工况下的原始信号转换为时频图像数据,之后按照元学习协议将数据样本随机采样到不同的学习任务中.在有限样本的条件下, FMFI可以通过训练任务中的样本信息获取通用的先验知识,在未知的测试任务下实现准确快速的故障辨识.选取了与望远镜俯仰轴承工况具有相似性的变负载轴承数据集进行实验,实验结果表明, FMFI方法具有很高的准确性和可靠性,为大口径射电望远镜俯仰轴承的主动运维和高质量服役提供了有力的技术支持. |
| Other Abstract | The prolonged operation of the large aperture radio telescope will lead to slight distortion of elevation axis, increasing the risk of fatigue of the rolling bearing which is the core component of the elevation axis. This can lead to a decline in the bearing life and the pointing accuracy of the telescope, which will greatly affect the telescope’s high performance service. Investigating the fault identification method for the elevation bearing can provide an important support for the high-performance operation of the telescope antenna. In this paper, a few-shot meta-learning fault identification (FMFI) method based on meta-learning is proposed in order to achieve accurate fault identification of elevation bearing under limited data and complex working conditions. The raw signals of different working conditions are first converted to time-frequency images data and then randomly sampled for different learning tasks according to the meta-learning protocol. Under limited sample data condition, the FMFI method can obtain universal prior knowledge from the sample in the training task to achieve accurate and fast fault identification in unknown testing tasks. The variable load bearing data set which is similar to the working condition of telescope elevation bearing is selected for experiment, and the experimental results show that the FMFI method is high accurate and reliable, providing strong technical support for the operation, maintenance, and high-quality service of large aperture radio telescope. |
| Keyword | 望远镜 仪器:俯仰轴承 方法:数据分析 方法:模式识别 |
| DOI | 10.15940/j.cnki.0001-5245.2024.03.007 |
| URL | 查看原文 |
| Indexed By | CSCD ; 中文核心期刊要目总览 |
| Language | 中文 |
| WOS ID | CSCD:7729612 |
| CSCD ID | CSCD:7729612 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.xao.ac.cn/handle/45760611-7/7590 |
| Collection | 射电天文研究室_天线技术实验室 |
| Corresponding Author | 许谦 |
| Affiliation | 1.中国科学院新疆天文台，乌鲁木齐 830011; 2.中国科学院大学，北京 100049; 3.中国科学院射电天文重点实验室，乌鲁木齐 830011; 4.新疆射电天体物理重点实验室，乌鲁木齐 830011 |
| First Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Corresponding Author Affilication | Xinjiang Astronomical Observatory, Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | 朱金浩,许谦,薛飞,等. 一种基于元学习的大口径射电望远镜俯仰轴承故障辨识方法研究[J]. 天文学报,2024,65(3):84-93. |
| APA | 朱金浩,许谦,薛飞,何飞龙,梁娟,&许多祥.(2024).一种基于元学习的大口径射电望远镜俯仰轴承故障辨识方法研究.天文学报,65(3),84-93. |
| MLA | 朱金浩,et al."一种基于元学习的大口径射电望远镜俯仰轴承故障辨识方法研究".天文学报 65.3(2024):84-93. |
| Files in This Item: | ||||||
| File Name/Size | DocType | Version | Access | License | ||
| 朱金浩-2024-一种基于元学习的大口径（2167KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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