Earth rotation measurement with micromechanical yaw-rate gyro

Arnaudov, R.; Angelov, Y.

doi:10.1088/0957-0233/16/11/024

Cited by 15 publications

(15 citation statements)

References 4 publications

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“…The scale factor of the prototype IFOG was calculated as 13.83 ( • /h)/mV, corresponding to a sensitivity of 72 µV/( • /h), and the repeatability in scale factor was 0.73%. Considering the earth rotation rate of 4.178074 × 10 −3 ( • /s), corresponding to 15.041 ( • /h) according to WGS84 (World Geodesic System) (Arnaudov and Angelov 2005), the bias stability attained on the prototype IFOG is close to 1 ( • /h) limit of tactical aimed missiles. NE of 0.001 ( • /h)/Hz 1/2 for the designed IFOG prototype in sampling duration of 1 sec was the ultimate rotation rate which can be sensed.…”

Section: Resultsmentioning

confidence: 92%

Construction and characterization of interferometric fiber optic gyroscope (IFOG) with erbium doped fiber amplifier (EDFA)

Celikel

2007

Opt Quant Electron

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Gyroscopes, which sense changes on absolute angular rate and are classified into Interferometric Fiber Optic Gyroscopes (IFOG), Ring Laser Gyroscopes (RLG) and MicroElectro-Mechanical Systems (MEMS) Gyroscopes, are critical components of the navigation systems together with accelerometers. Being dominant over other types of gyroscopes in terms of performance and cost, IFOGs have widely been used in metrology and in particular defense/aerospace industry. This paper covers the design details of both optical and electronic components of IFOG prototype, the sensing mechanism of which is based on Sagnac Phase Shift, constructed in Optics Laboratory of National Metrology Institute of TURKEY as absolute angular rate sensor. In the prototype IFOG, open-loop configuration was applied, a single mode telecommunication optical fiber and an EDFA pumped by DFB laser emitting at 1549.0 nm were used as sensing coil and broadband source, respectively. The voltage data carrying Sagnac Phase Shift was extracted by a phase tracking circuit consisting of an active RC band pass filter, an amplifier with adjustable gain and an AD630 balanced modulator chip which was operated as lock-in. For the prototype IFOG, peak to peak noise of 8 ( • /h) and bias stability of 1.57 ( • /h) were attained respectively. Moreover the scale factor of 13.83 ( • /h)/mV was derived with deviation of 0.73%.

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Section: Resultsmentioning

confidence: 92%

Construction and characterization of interferometric fiber optic gyroscope (IFOG) with erbium doped fiber amplifier (EDFA)

Celikel

2007

Opt Quant Electron

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“…It is also commonly referred to as a two-point gyrocompassing [10] since it mitigates additive bias errors through the differential, two position azimuth measurement.…”

Section: B Maytagging For North-findingmentioning

confidence: 99%

“…The common approaches to reduce the effect of bias drift on azimuth measurements include "carouseling" [6] and "maytagging" [10], [11]. We propose to tackle the problem of MEMS gyrocompassing by using the recently developed Quadruple Mass Gyroscope (QMG) [12], with the performance enhanced by Quality (Q) factors of 1.2 million, in drive-and sensemodes, and Allan deviation bias instability of 0.2°/hr [13].…”

mentioning

confidence: 99%

What is MEMS Gyrocompassing? Comparative Analysis of Maytagging and Carouseling

Prikhodko

Zotov

Trusov

et al. 2013

J. Microelectromech. Syst.

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North-finding based on micromachined gyroscopes is an attractive possibility. This paper analyzes north-finding methods and demonstrates a measured 4 mrad standard deviation azimuth uncertainty using an in-house developed vibratory silicon MEMS quadruple mass gyroscope (QMG). We instrumented a vacuum packaged QMG with isotropic Q-factor of 1.2 million and Allan deviation bias instability of 0.2°/hr for azimuth detection by measuring the earth's rotation. Continuous rotation ("carouseling") produced azimuth datapoints with uncertainty diminishing as the square root of the number of turns. Integration of 100 datapoints with normally distributed errors reduced uncertainty to 4 mrad, beyond the noise of current QMG instrumentation. We also implemented self-calibration methods, including in-situ temperature sensing and discrete ± 180°turning ("maytagging" or two-point gyrocompassing) as potential alternatives to carouseling. While both mechanizations produced similar azimuth uncertainty, we conclude that carouseling is more advantageous as it is robust to bias, scale-factor, and temperature drifts, although it requires a rotary platform providing continuous rotation. Maytagging, on the other hand, can be implemented using a simple turn table, but requires calibration due to temperature-induced drifts.[2012-0378]

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“…Maytagging has been widely applied in various methods of north finding angle detection, such as the two-point method, four-point method, and multiposition method. (6)(7)(8) It is simple to operate and is widely employed in practical applications. However, this method will increase the error caused by the rate random walk (RRW), which conflicts with the angular random walk (ARW).…”

Section: Introductionmentioning

confidence: 99%

Bidirectional Carouseling Method Based on Phase Difference for MEMS Gyro North Finder

Cai¹,

Zhang²,

Gao³

et al. 2019

Sensors and Materials

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The north finder has been widely used in precision guided weapons, unmanned aerial vehicles (UAVs), and other device. In this paper, a north finder based on a low-cost microelectro-mechanical system (MEMS) gyro is proposed. In order to reduce the substantial bias effect on the gyro's north finding angle, a bidirectional carouseling method is applied. To improve the north finding accuracy, the phase difference between the turntable rotation rate and the gyro output is used. After the calculation of the phase difference, a five-order Butterworth filter is chosen to eliminate the gyro high-frequency noise. Experimental results demonstrate that the proposed method based on the phase difference can effectively improve the north finding accuracy by 50% compared with the traditional carouseling method.

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Earth rotation measurement with micromechanical yaw-rate gyro

Cited by 15 publications

References 4 publications

Construction and characterization of interferometric fiber optic gyroscope (IFOG) with erbium doped fiber amplifier (EDFA)

Construction and characterization of interferometric fiber optic gyroscope (IFOG) with erbium doped fiber amplifier (EDFA)

What is MEMS Gyrocompassing? Comparative Analysis of Maytagging and Carouseling

Bidirectional Carouseling Method Based on Phase Difference for MEMS Gyro North Finder

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