Topic
Ring laser gyroscope
About: Ring laser gyroscope is a research topic. Over the lifetime, 2070 publications have been published within this topic receiving 18609 citations. The topic is also known as: Sagnac interferometer.
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08 Apr 2021TL;DR: In this paper, the error estimation and high-precision calibration of ring laser gyroscope strapdown inertial navigation system (RLG SINS) under both static and small-angle swing bases using systematic calibration method is studied.
Abstract: Since sensor errors limit navigation accuracy in ring laser gyroscope strapdown inertial navigation system (RLG SINS), the calibration of the error parameters is usually a key technology of SINS. This paper mainly studies the error estimation and high-precision calibration of RLG SINS under both static and small-angle swing bases using systematic calibration method. In this paper, firstly, based on the analysis of the error source, the error models of the quartz flexible accelerometers and laser gyroscopes are established. Meanwhile, according to the basic principles of SINS, the error equations of SINS in navigation coordinate system are derived. Then, this paper studies systematic calibration method. In this part, a multi position rotation error excitation method is introduced and a 33-dimensional Kalman filter is designed for the estimation of the error parameters. Finally, the simulation experiments for the error calibration of the inertial sensors under both static and small-angle swing conditions are performed to verify the effectiveness of this systematic calibration method. This method performs well in the simulation experiments and has its value in the online calibration of slight swing conditions, such as ship mooring state and the missile launcher swing state.
08 Feb 2007
TL;DR: In this paper, it was shown that the phase difference of the counter propagating waves is proportional to the inverse square of the particle velocity in a SAGA-based interferometer.
Abstract: A gyroscope based on Sagnac interferometer measures the rotation rate relative to an inertial frame of reference. Sagnac effect originally has been derived and experimentally demonstrated with optical waves. Later, matter wave based Sagnac interferometers were developed due to inherent sensitivity over a photon based system. However in any interferometer whether it is photon or matter wave based the resultant phase shift due to counter-rotating waves is independent of the wave velocity. Here we show that one can have a larger phase shift with slower matter waves using Aharonov-Bohm effect: the phase difference of the counter propagating waves is proportional to the inverse square of the particle velocity.
TL;DR: In this article , a 10m perimeter, helium-neon based ring laser gyroscope was used for 3s 2→2p 6 (611.8) and 543.4nm lasing.
Abstract: We report on the operation of a 10 m perimeter, helium-neon based ring laser gyroscope on the 3s 2→2p 6 (611.8 nm) and 3s 2→2p 10 (543.4 nm) transitions of neon. Cavity Q factors of 1.5×1012 and 3.8×1011 are obtained for 611.8 and 543.4 nm operation, inferred from measured ring-down times of 485 and 110 μs, respectively. For Sagnac frequencies, due to Earth rotation, of 205.14 and 230.96 Hz, minimum resolvable rotation rates of 80 and 226 prad/s are achieved for integration times of around 100 s. While environment limited performance is achieved for operation at 611.8 nm, it is found that a restrictive gas pressure regime must be utilized for the 543.4 nm lasing wavelength. As a consequence, the output photon count is low, which limits its intrinsic sensitivity for rotation rate measurements.
30 May 2022
TL;DR: In this article , an experimental study of the temperature stability of the Zeeman Laser Gyro Ring Resonator has been carried out, where the simulation of temperature deformations in Zeeman gyro perimeter by the MATLAB was carried out.
Abstract: An experimental study of the temperature stability of the Zeeman Laser Gyro Ring Resonator has been carried out. The simulation of temperature deformations in Zeeman gyro perimeter by the MATLAB has been carried out. Based on the model obtained, the contribution of structural elements to the resulting drift of the perimeter was estimated. A functional dependence of the temperature drift in ring resonator is obtained, which makes it possible to optimize the operation of the perimeter adjustment system.
28 Mar 2023
TL;DR: In this article , a high frequency (3MHz) aluminum nitride (AlN) on silicon resonant gyroscope mode-matched using laser trimming and operated using a multi-coefficient eigenmode technique.
Abstract: This paper reports on the characterization of a high frequency (3MHz) aluminum nitride (AlN) on silicon resonant gyroscope mode-matched using laser trimming and operated using a multi-coefficient eigenmode technique. The annulus gyroscope uses a pair of bulk-acoustic wave (BAW) in-plane bending modes with strong piezoelectric coupling, showing a moderate $Q$ ~10,000 for expanding the open-loop operational bandwidth to 150Hz. A non-iterative trimming algorithm is implemented to match the frequency in a single pass, and an engineered electrodes layout enables multi-coefficient eigenmode operation to create virtual driving/readout vectors matching the actual non-ideal mode shape to reduce the quadrature error and bias instability.