Infrared and Laser Engineering, Volume. 51, Issue 12, 20220202(2022)

Remote sensing satellite structure in-orbit thermal strain Bragg fiber grating monitoring method

Haoran Wang1,2, Mingli Dong1,2, Guangkai Sun1,2, Yanlin He1,2, and Kangpeng Zhou1,3
Author Affiliations
  • 1Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument, Beijing Information Science and Technology University, Beijing 100192, China
  • 2Beijing Laboratory of Optical Fiber Sensing and System, Beijing Information Science and Technology University, Beijing 100016, China
  • 3School of Precision Instrument & Opto-Electronics Engineering, Tianjin University, Tianjin 300072, China
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    Remote sensing satellite structures are susceptible to thermal strain during in-orbit service due to extreme temperature changes in space and microgravity environment, which seriously affects the detection accuracy. However, the existing methods are difficult to achieve thermal strain monitoring in orbit. To solve this problem, a thermal strain fiber grating monitoring method with temperature decoupling function is proposed. The thermal strain of the structure is calculated and analyzed by numerical simulation, and the change of temperature and strain fields under overall and local thermal loading are obtained. A thermal strain fiber optic monitoring test system is designed and constructed, thermal loading fiber optic measurement test on satellite antenna structure specimens is conducted, the accuracy of structural thermal strain fiber optic monitoring is tested and analyzed, and the effectiveness of the method is verified. Research results show that in the temperature variation range of -120-120 ℃, the monitoring accuracy of temperature and thermal strain by fiber Bragg grating sensor and temperature decoupling method are 1.02% and 2.45%, respectively. The reconstruction errors of the structural temperature and strain fields are 3.24% and 6.61% under the action of local thermal loading from 30 ℃ to 100 ℃, respectively. The method has the prospect of application in satellite structure in-orbit health monitoring.

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    Haoran Wang, Mingli Dong, Guangkai Sun, Yanlin He, Kangpeng Zhou. Remote sensing satellite structure in-orbit thermal strain Bragg fiber grating monitoring method[J]. Infrared and Laser Engineering, 2022, 51(12): 20220202

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    Paper Information

    Category: Optical communication and sensing

    Received: Mar. 21, 2022

    Accepted: --

    Published Online: Jan. 10, 2023

    The Author Email:

    DOI:10.3788/IRLA20220202

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