Fiber optic gyroscope dynamic north-finder algorithm modeling and analysis based on Simulink

Zhang, Zhengyi; Liu, Chuntong

doi:10.1007/s13320-017-0411-7

Cited by 7 publications

(6 citation statements)

References 6 publications

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“…The static method typically involves utilizing a turntable to position the gyroscope at multiple sampling locations and statically measuring the Earth’s rotation rate projection at these positions [ 12 , 13 , 14 , 15 , 16 , 17 , 18 ]. However, introducing multiple measurement positions while enhancing accuracy imposes a significant time burden and requires an exact turntable positioning [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

“…Numerous studies have focused on dynamic north-finding methods to expedite and enhance the accuracy of north-finding [ 19 , 20 , 21 , 22 , 23 ]. The dynamic method involves the continuous rotation of the gyroscope, driven by the turntable at a predetermined speed, with the azimuth angle determined by analyzing the continuous gyroscope output signal [ 20 , 21 , 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

“…The robustness of the dynamic method to bias error, scale factor deviation, and temperature drift has been demonstrated in the literature [ 21 , 22 , 26 ] and compared to static north-finding. The majority of research on dynamic north finding has focused on lower rotation speeds, usually less than 60°/s [ 19 , 21 , 22 ]. This is because, as turntable speed increases, both north-finding variance and bias errors escalate significantly, challenging the effectiveness of north-finding at higher speeds and impeding efforts to enhance accuracy [ 19 , 21 ].…”

Section: Introductionmentioning

confidence: 99%

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A Segmented Cross-Correlation Algorithm for Dynamic North Finding Using Fiber Optic Gyroscopes

Fang,

Mao,

Chen

et al. 2024

Sensors

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Fiber optic gyroscope (FOG)-based north finding is extensively applied in navigation, positioning, and various fields. In dynamic north finding, an accelerated turntable speed shortens the time required for north finding, resulting in a rapid north-finding response. However, with an increase in turntable speed, the turntable’s jitter contributes to signal contamination in the FOG, leading to a deterioration in north-finding accuracy. This paper introduces a divide-and-conquer algorithm, the segmented cross-correlation algorithm, designed to mitigate the impact of turntable speed jitter. A model for north-finding error is established and analyzed, incorporating FOG’s self-noise and the turntable’s speed jitter. To validate the feasibility of our method, we implemented the algorithm on a FOG. The simulation and experimental results exhibited a strong concordance, affirming the validity of our proposed north-finding error model. The experimental findings indicate that, at a turntable speed of 180°/s, the north-finding bias error within a 360 s duration is 0.052°, representing a 64% improvement over the traditional algorithm. These results indicate the effectiveness of the proposed algorithm in mitigating the impact of unstable turntable speeds, offering a solution for north finding with both prompt response and enhanced accuracy.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Segmented Cross-Correlation Algorithm for Dynamic North Finding Using Fiber Optic Gyroscopes

Fang,

Mao,

Chen

et al. 2024

Sensors

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“…As a kind of rotation rate sensor based on the Sagnac effect [1], interferometric fiber optic gyroscope (IFOG) has been developed for over forty years. It is an inertial navigation instrument that is widely used in national defense industries and civilian applications such as aviation, aerospace, and land navigation [2][3][4][5]. Compared with its main competitor, ring laser gyroscope (RLG), the IFOG does not need high-precision processing of the optical mirror and strict sealing of the cavity or ignition voltage of several thousand volts.…”

Section: Introductionmentioning

confidence: 99%

Low-Drift Closed-Loop Fiber Optic Gyroscope of High Scale Factor Stability Driven by Laser With External Phase Modulation

et al. 2022

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In view of the poor scale factor stability of the interferometric fiber optic gyroscope (IFOG), it is a creative method to use laser to drive the IFOG for its better frequency stabilization characteristics instead of the broadband light source. As the linewidth of laser is narrow, the errors of coherent backscattering, polarization coupling, and Kerr effect are reintroduced which cause more noise and drift. This paper studies laser spectrum broadening based on external phase modulation of Gaussian white noise (GWN). The theoretical analysis and test results indicate that this method has a good effect on spectrum broadening and can be used to improve the performance of the laser-driven IFOG. In the established closed-loop IFOG, a four-state modulation (FSM) is adopted to avoid temperature instability of the multifunction integrated-optic chip (MIOC) and drift caused by the electronic circuit in demodulation. The experimental results show that the IFOG driven by broadened laser has the angular random walk noise of 0.003 8 °/√h and the drift of 0.017 °/h, which are 62% and 66% better than those without modulation respectively, of which the drift has reached the level of the broadband light source. Although the noise still needs further reduction, its scale factor stability is 0.38 ppm, which has an overwhelming advantage compared with the traditional IFOG.

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“…Different methods [1,2,3,4,5,6] have been proposed in existing work to determine the azimuth. However, these works have mainly been developed for the measurement of inertial azimuth, which is the angle between the north direction and the projection of the initial plane onto the launch location.…”

Section: Introductionmentioning

confidence: 99%

Seeker-Azimuth Determination with Gyro Rotor and Optoelectronic Sensors

Bai

Zhao

Rong

et al. 2018

Sensors

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This paper presents an approach to seeker-azimuth determination using the gyro rotor and optoelectronic sensors. In the proposed method, the gyro rotor is designed with a set of black and white right spherical triangle patterns on its surface. Two pairs of optoelectronic sensors are located symmetrically around the gyro rotor. When there is an azimuth, the stripe width covering the black and white patterns changes. The optoelectronic sensors then capture the reflected optical signals from the different black and white pattern stripes on the gyro rotor and produce the duty ratio signal. The functional relationship between the measured duty ratio and the azimuth information is numerically derived, and, based on this relationship, the azimuth is determined from the measured duty ratio. Experimental results show that the proposed approach produces a large azimuth range and high measurement accuracy with the linearity error of less than 0.005.

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Fiber optic gyroscope dynamic north-finder algorithm modeling and analysis based on Simulink

Cited by 7 publications

References 6 publications

A Segmented Cross-Correlation Algorithm for Dynamic North Finding Using Fiber Optic Gyroscopes

A Segmented Cross-Correlation Algorithm for Dynamic North Finding Using Fiber Optic Gyroscopes

Low-Drift Closed-Loop Fiber Optic Gyroscope of High Scale Factor Stability Driven by Laser With External Phase Modulation

Seeker-Azimuth Determination with Gyro Rotor and Optoelectronic Sensors

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