A New Open-Loop Fiber Optic Gyro Error Compensation Method Based on Angular Velocity Error Modeling

Zhang, Yanshun; Guo, Yajing; Li, Chunyu; Wang, Yixin; Wang, Zhanqing

doi:10.3390/s150304899

Cited by 15 publications

(12 citation statements)

References 29 publications

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“…However, IMUs based on FOG technology are subjected to various environmental disturbances. In particular, temperature variation is the major factor that affects FOG performance [ 41 ]. Several research efforts have been made to reduce this effect [ 41 , 42 , 43 , 44 , 45 ].…”

Section: Zupt Filter Comparative Performance Analysismentioning

confidence: 99%

“…In particular, temperature variation is the major factor that affects FOG performance [ 41 ]. Several research efforts have been made to reduce this effect [ 41 , 42 , 43 , 44 , 45 ]. Since TCZUPT filter can be directly applied on raw data, it allows to simplify the management of thermal correction process also for IMUs based on FOG technology, saving time and economic resources.…”

Section: Zupt Filter Comparative Performance Analysismentioning

confidence: 99%

See 1 more Smart Citation

An Innovative Strategy for Accurate Thermal Compensation of Gyro Bias in Inertial Units by Exploiting a Novel Augmented Kalman Filter

Fontanella

Accardo

Moriello

et al. 2018

Sensors

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This paper presents an innovative model for integrating thermal compensation of gyro bias error into an augmented state Kalman filter. The developed model is applied in the Zero Velocity Update filter for inertial units manufactured by exploiting Micro Electro-Mechanical System (MEMS) gyros. It is used to remove residual bias at startup. It is a more effective alternative to traditional approach that is realized by cascading bias thermal correction by calibration and traditional Kalman filtering for bias tracking. This function is very useful when adopted gyros are manufactured using MEMS technology. These systems have significant limitations in terms of sensitivity to environmental conditions. They are characterized by a strong correlation of the systematic error with temperature variations. The traditional process is divided into two separated algorithms, i.e., calibration and filtering, and this aspect reduces system accuracy, reliability, and maintainability. This paper proposes an innovative Zero Velocity Update filter that just requires raw uncalibrated gyro data as input. It unifies in a single algorithm the two steps from the traditional approach. Therefore, it saves time and economic resources, simplifying the management of thermal correction process. In the paper, traditional and innovative Zero Velocity Update filters are described in detail, as well as the experimental data set used to test both methods. The performance of the two filters is compared both in nominal conditions and in the typical case of a residual initial alignment bias. In this last condition, the innovative solution shows significant improvements with respect to the traditional approach. This is the typical case of an aircraft or a car in parking conditions under solar input.

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Section: Zupt Filter Comparative Performance Analysismentioning

confidence: 99%

Section: Zupt Filter Comparative Performance Analysismentioning

confidence: 99%

An Innovative Strategy for Accurate Thermal Compensation of Gyro Bias in Inertial Units by Exploiting a Novel Augmented Kalman Filter

Fontanella

Accardo

Moriello

et al. 2018

Sensors

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“…Açık çevrim fiberoptik jiroskopun optik ve elektriksel bağlantılarını gösteren bağlantı şeması Şekil 1'de gösterilmiştir [9,15,16] işareti için kabul edilebilir ölçüttedir [23,24]. Geleneksel jiroskop için aynı doğrusallık ilişkisinde dinamik ölçüm aralığı ise 0-0,38 rad/s hesaplanmıştır.…”

Section: Teori̇ (Theory)unclassified

“…Bu süreçte, çeşitli fiberoptik jiroskop tasarımları geliştirilmiş ve her biri için özel kullanım alanları geliştirilmiştir. Fiberoptik jiroskop tasarımları arasında; Halka Lazer (Ring Laser) [2,3] , Kapalı Çevrim (Closed-Loop) [4][5][6], Açık Çevrim (Open Loop) [7][8][9] ve Mikro-Elektromekanik Sistemli (MEMS) [10,11] jiroskoplar en çok göze çarpanlardır. Ancak, sağladığı avantajlar nedeniyle bu alanda yürütülen ve günümüze kadar uzanan çalışmalarda genellikle açık çevrim ve kapalı çevrim jiroskop konfigürasyonları araştırmacıların ilgi odağı olmuştur.…”

Section: Gi̇ri̇ş (Introduction)unclassified

açık çevrim fiberoptik jiroskop için yeni bir açısal hız modellemesi

Navruz

Arı

Yücel

et al. 2018

Gazi Üniversitesi Mühendislik-Mimarlık Fakültesi Dergisi

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 Sensitive angular velocity measurement  Extended measurement range  Cost effective fiberoptic gyroscope Fiber optic gyroscopes are optoelectronic technology products that are sensitive to angular velocity. In this study, a cost-effective open loop optical fiber gyroscope configuration is proposed, which can accurately measure the angular velocity of rotating objects. By performing a harmonic analysis of the signal at the gyroscope output, a novel angular velocity model that correlate the angular velocity of rotation with high accuracy is presented. Using this model in an open-loop fiber gyroscope, it has been shown that angular velocity can be measured at a wider measuring range with higher measurement sensitivity. Purpose: This paper has multiple purposes. The main purpose is to present a novel open loop fiber optic gyroscope design to more accurately measure the angular rotation speed in a wider measuring range. Other objectives are to perform time and frequency domain analysis of the fiberoptic gyroscope, to determine the relationship between the first and second harmonics changing with angular velocity and to develop a low cost and uncomplicated gyroscope design for experimental studies. Theory and Methods: Harmonic analysis of the gyroscope demonstrates that the 1st and 2nd harmonics show periodic changes with the circular velocity. By deriving the difference of harmonics, a highly accurate output signal associated with angular velocity and can be generated. A more precise angular velocity measurement can be performed in a wider dynamic measurement range using the obtained gyroscope signal. Analysis and testing of the presented model is simulated in Matlab software. Furthermore, the proposed fiber gyroscope system has been successfully installed to obtain real-time measurements. Results: Both the graphs generated from the simulation studies and the experimentally obtained data clearly demonstrate the gyroscopic properties overlapping each other. All results clearly show that the proposed model increases the dynamic range of the gyroscope and its sensitivity to angular velocity. In the experimental measurements performed within the 0 to 0.7 rad/s angular velocity measurement range, the smallest angular velocity that can be measured is 5.10-4 rad/s and the corresponding 1st harmonic amplitude is-93.5dB. Conclusion: The studies presented in this paper contribute to the development of a cost effective gyroscope. The proposed design method increases the measurement accuracy and range of the open loop fiberoptic gyroscope.

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“…The gyroscope method using a Sagnac-effect-based integrated gyroscope with small footprint has high resolution, and can sense transient angular velocity [ 4 , 5 , 6 ]. However it is not suitable for remote measurement and super-low velocity, and can be affected by environmental factors [ 7 , 8 ]. The interferometry methods, including Fabry-Perot cavities and Mach-Zehnder interferometers, have complicated structures and high precision fabrication requirements [ 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

Remote Evaluation of Rotational Velocity Using a Quadrant Photo-Detector and a DSC Algorithm

Zeng

Zhu

Yang

2016

Sensors

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This paper presents an approach to remotely evaluate the rotational velocity of a measured object by using a quadrant photo-detector and a differential subtraction correlation (DSC) algorithm. The rotational velocity of a rotating object is determined by two temporal-delay numbers at the minima of two DSCs that are derived from the four output signals of the quadrant photo-detector, and the sign of the calculated rotational velocity directly represents the rotational direction. The DSC algorithm does not require any multiplication operations. Experimental calculations were performed to confirm the proposed evaluation method. The calculated rotational velocity, including its amplitude and direction, showed good agreement with the given one, which had an amplitude error of ~0.3%, and had over 1100 times the efficiency of the traditional cross-correlation method in the case of data number N > 4800. The confirmations have shown that the remote evaluation of rotational velocity can be done without any circular division disk, and that it has much fewer error sources, making it simple, accurate and effective for remotely evaluating rotational velocity.

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A New Open-Loop Fiber Optic Gyro Error Compensation Method Based on Angular Velocity Error Modeling

Cited by 15 publications

References 29 publications

An Innovative Strategy for Accurate Thermal Compensation of Gyro Bias in Inertial Units by Exploiting a Novel Augmented Kalman Filter

An Innovative Strategy for Accurate Thermal Compensation of Gyro Bias in Inertial Units by Exploiting a Novel Augmented Kalman Filter

açık çevrim fiberoptik jiroskop için yeni bir açısal hız modellemesi

Remote Evaluation of Rotational Velocity Using a Quadrant Photo-Detector and a DSC Algorithm

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