Compensation of scale factor nonlinear error introduced by harmonic distortion for open-loop fiber optic gyroscopes

Article Engineering, Electrical & Electronic

Fiber-Optic Sagnac Interferometry for Gravity Gradient Measurements

Yanjun Chen et al.

Summary: This paper presents a design for gravity gradient measurements using Sagnac interferometry. A structure with two masses is used to convert gravity gradients into rotational motion, which is probed using Sagnac interferometry based on optical fibers. The systematic effects are analyzed theoretically and validated through static observations. With a record of 37 days, a noise level of 5 x 10(-12) rads(-2) Hz(-1/2) is achieved under room temperature conditions without vibration isolation or magnetic shielding. The corresponding contribution to gravity gradient measurement is estimated to be 1 x 10(-2) E Hz(-1/2).

IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT (2023)

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Article Engineering, Multidisciplinary

Study on nonlinear error calibration of fiber optical gyroscope scale factor based on LSTM

Shuai Zhao et al.

Summary: The calibration accuracy of the inertial navigation system is crucial for its actual navigation performance. This paper presents a calibration experiment and proposes a nonlinear error compensation method based on LSTM, which effectively reduces the scale factor error and angle measurement error of the fiber optical gyroscope.

MEASUREMENT (2022)

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Review Geochemistry & Geophysics

Rotational Seismology: Review of Achievements and Outlooks

K. V. Kislov et al.

Summary: Rotational seismology is a new area of science that has applications in various fields of seismology. Advances in acquisition technology have enabled the observation of rotational motions, posing new challenges and opportunities for seismologists. Research in rotational seismology is expected to promote the development of seismology and related fields.

SEISMIC INSTRUMENTS (2021)

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Article Optics