中国空间科学技术

中国空间科学技术 ›› 2024, Vol. 44 ›› Issue (6): 108-121.doi: 10.16708/j.cnki.1000-758X.2024.0096

• 论文 • 上一篇    下一篇

空间站太阳翼振动测量中的无线传感器网络系统

郎燕*，梁鹤，牛和明，张国琪，张锦江，郭朝礼，李林   

  1. 1.北京控制工程研究所，北京100094
    2.空间智能控制技术重点实验室，北京10009
  • 收稿日期:2023-07-11 修回日期:2023-08-07 录用日期:2023-09-09 发布日期:2024-12-03 出版日期:2024-12-05

Wireless sensor network system for solar array vibration measurement in space station

LANG Yan*，LIANG He，NIU Heming，ZHANG Guoqi，ZHANG Jinjiang，GUO Chaoli，LI Lin   

  1. 1.Beijing Institute of Control Engineering, Beijing 100094, China
    2.Laboratory of Science and Technology on Space Intelligent Control, Beijing 100094, China
  • Received:2023-07-11 Revision received:2023-08-07 Accepted:2023-09-09 Online:2024-12-03 Published:2024-12-05

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摘要： 基于中国空间站太阳翼挠性振动测量和动力学参数辨识需求，中国首次在轨成功应用了无线加速度计传感器网络。首先介绍了天和核心舱、问天实验舱上的无线传感器网络架构设计，然后针对挠性辨识多源数据融合需求,提出基于无线时延自主寻优补偿的应答式TCP/IP校时策略和基于无线基准节点的广播式UDP校时策略。针对无线节点通信链路可能被太阳翼阵面遮挡而造成的测量中断问题，提出基于中继代传的自主无线网络拓扑动态管理策略，实现了振动测量数据的高可靠传输。总结了天和舱、问天舱无线加速度计传感器网络在轨应用情况，通过飞行实测数据证明实现了TCP/IP 模式下校时精度优于 20ms、UDP 模式下校时精度优于 70ms 的时间同步能力;以太阳翼 180°转角下的主动激振工况实测数据评估了无线网络的高可靠采集能力，满足太阳翼模态辨识要求。最后基于空间站太阳翼振动测量飞行试验情况，对未来无线传感器网络的在轨广泛应用提出了几点启示。

关键词: 无线传感器网络, 时间同步, 网络拓扑, 空间站, 振动测量

Abstract: Based on the requirement of flexible vibration measurement and dynamic parameter identification of the solar array in China space station, China has successfully applied a wireless accelerometer sensor network in orbit for the first time. Firstly, the architecture designs of the wireless sensor network in Tianhe core module and Wentian lab module are introduced. Then, for the requirement of multi-source data fusion of modal identification, the responsive TCP/IP time synchronization based on wireless delay self-optimization compensation and the broadcast UDP time synchronization based on wireless reference node are proposed. To address the issue of measurement interruption of wireless node communication links caused by the possible obstruction of the solar array, an autonomous wireless network topology dynamic management method based on relay transmission is proposed, achieving high reliability transmission of vibration measurement data. The in-orbit application of wireless accelerometer sensor networks in Tianhe module and Wentian module is summarized. The flight measurement data show that the time synchronization accuracy is better than 20ms for TCP/IP mode and 70ms for UDP mode. The highly reliable acquisition capability of wireless network is evaluated by using the measurement data of active excitation conditions at a 180° angle of the solar array, meeting the requirement for modal identification. Finally, based on the flight test results of space station solar array vibration measurement, several inspirations are proposed for the widespread application of future wireless sensor networks in orbit.

Key words:  , wireless sensor network；time synchronization；network topology；space station；vibration measurement