Chinese Optics, Volume. 16, Issue 6, 1404(2023)

Thermal design of ground weak force measurement system for inertial sensors

Li-min REN1,2, Li-heng CHEN1,3、*, Xu MENG1,2, and Zhi WANG1,4
Author Affiliations
  • 1Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, Changchun 130033, China
  • 2University of Chinese Academy of Sciences, Beijing 100049, China
  • 3Centre of Materials Science and Optoelectronics Technology, University of Chinese Academy of Science, Beijing 100049, China
  • 4School of Fundamental Physics and Mathematical Science, Hangzhou Institute for Advanced Study, UCAS, Hangzhou 310024, China
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    In order to meet the ultra-high temperature stability requirements of the ground weak force measurement system for inertial sensor, the thermal design of the whole system is carried out. Firstly, the structure of ground weak force measurement system of inertial sensor, heat transfer path of sensitive structure and internal heat source are introduced. Secondly, according to the index requirements of the thermal control of the system, a high-precision thermal control method combining the three-stage thermal control structure and Proportional Integral Differential (PID) control algorithm is proposed to reduce the influence of temperature noise on the detection sensitivity of the inertial sensor. Then, UG/NX software is used to establish the finite element model and carry out the thermal analysis calculation under different working conditions, and the temperature change value of the measurement system in the time domain after equilibrium is (1.2-1.6) ×10-5 K. Finally, the temperature distribution of the measurement system in the time domain is described in the frequency domain, and the temperature stability results of sensitive structure of the inertial sensor are obtained. The analysis results show that under the current thermal control measures, the temperature stability of the sensitive structure of the inertial sensor is better than 10-4 K/Hz1/2, meeting the requirements of thermal control indicators, and the thermal design scheme is reasonable and feasible.

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    Li-min REN, Li-heng CHEN, Xu MENG, Zhi WANG. Thermal design of ground weak force measurement system for inertial sensors[J]. Chinese Optics, 2023, 16(6): 1404

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    Paper Information

    Category: Original Article

    Received: Feb. 4, 2023

    Accepted: Jul. 26, 2023

    Published Online: Nov. 29, 2023

    The Author Email:

    DOI:10.37188/CO.2023-0022

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