Research on the application of inertially stabilized platform in the dynamic measurement of cold atomic gravimeter

Pei-Jun Chen; Min-Rui Jiang; Xiao-Feng Lv; Hang Zhou; Di Yang; Ying Zhou; Zifan Jin; Shu-Ping Peng

doi:10.1016/j.heliyon.2023.e23936

Research on the application of inertially stabilized platform in the dynamic measurement of cold atomic gravimeter

Heliyon. 2023 Dec 17;10(1):e23936. doi: 10.1016/j.heliyon.2023.e23936. eCollection 2024 Jan 15.

Authors

Pei-Jun Chen^{1

2}, Min-Rui Jiang¹, Xiao-Feng Lv¹, Hang Zhou¹, Di Yang¹, Ying Zhou¹, Zifan Jin¹, Shu-Ping Peng¹

Affiliations

¹ Zhejiang Provincial Key Laboratory of Quantum Precision Measurement, College of Science, Zhejiang University of Technology, Hangzhou 310023, China.
² School of mechanical and electrical engineering, Huangshan College, Huangshan 245041, China.

Abstract

Dynamic gravity field measurement based on the cold atom absolute gravity measurement system has important applications in geological exploration, gravity field mapping and other fields. The inertial stabilized platform is the key component of the dynamic cold atom absolute gravity measurement system, which can isolate the interference of carrier angle motion and keep the atomic gravimeter probe in the horizontal attitude during the measurement process. In this paper, according to the dynamic measurement requirements of atomic gravimeter, a high-precision two-axis inertial stabilized platform system is designed. The relationship between attitude angle and gravity measurement error is analyzed, and the stability of the system is enhanced by lead-lag method. Then the static vertical vibration power spectrum of the platform is measured to consider its influence on dynamic gravity measurement. Finally, a dynamic gravity test experiment was conducted in the Yellow Sea to verify the attitude control accuracy of the platform, and the attitude data of the platform under different heading were evaluated. The attitude standard deviation of the platform was better than 4 × 10^-5 rad, and the absolute gravity standard deviation of the linear round-trip measurement reached 1.49 mGal. The experimental data show that the inertial stabilized platform can meet the dynamic measurement requirements of the cold atom gravimeter.

Keywords: Absolute gravity measurement; Cold atomic gravimeter; High precision horizontal attitude; Inertially stabilized platform.