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  Subjects -> AERONAUTICS AND SPACE FLIGHT (Total: 124 journals)
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Gyroscopy and Navigation
Journal Prestige (SJR): 0.292
Citation Impact (citeScore): 1
Number of Followers: 214  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 2075-1087 - ISSN (Online) 2075-1109
Published by Springer-Verlag Homepage  [2468 journals]
  • Maritime Cybersecurity. Navigational Aspect

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      Abstract: This article is a review of publications on maritime cybersecurity with the focus made on navigation support. Cyber threats to electronic chart display and information system (ECDIS), automatic identification system (AIS), voyage data recorder (VDR), and integrated navigation system (INS) as a whole are considered. The specific features of cybersecurity of maritime autonomous surface ships (MASS) as well as the impact of the human factor on cybersecurity are discussed, and the regulatory framework for preventing cyber threats is analyzed.
      PubDate: 2023-12-01
       
  • Gimballess Electrostatic Gyroscope with a Rotor without TiN Coating

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      Abstract: The article compares the test results for gimballess electrostatic gyroscopes containing rotors with a light-contrast pattern applied to titanium nitride (TiN) coating or to beryllium. The criteria for comparing the devices with different types of rotors are proposed and justified. The need to modify the rotor manufacturing technology in order to improve the rotor design and mature some technological operations is analyzed. It has been shown that at a certain stage it is rational to mark the raster pattern on the titanium nitride coating, and currently the pattern can be again applied directly to the rotor beryllium surface.
      PubDate: 2023-12-01
       
  • Research on Feasibility of Low-Observable Acoustic Communication in AUV
           Group Navigation

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      Abstract: Under the water, the data are transmitted for ranges above dozens of meters using the acoustic modems. The acoustic modems are employed, in particular, for data transmission in positioning and navigation of both single and grouped underwater vehicles. Network communication methods are widely used for exchanging the navigation data between grouped autonomous underwater vehicles (AUVs). They are applied, for example, to keep the AUV formation geometry and/or to exchange the navigation data with the lead vessels. These methods can be combined, i.e., provide not only the exchange of mutual/relative positions between the AUVs for formation keeping, but also underwater georeferenced positioning for the group navigation in the geographical frame. A number of factors should be taken into account in the coordinated or cooperated AUV group navigation. As the number of interacting AUVs increases, their frequent addressing the acoustic medium is undesirable, because low capacity of the acoustic channel severely limits the underwater data traffic. Moreover, it is important to minimize the effect produced by the AUV acoustic system on the acoustic medium, particularly, to make the AUV less visible when its acoustic communication and positioning system is operating.
      PubDate: 2023-12-01
       
  • Current State and Development Prospects of Fiber-Optic Gyroscopes

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      Abstract: — The paper describes the current state of fiber-optic gyroscope (FOG) development. An overview of the modern gyroscopic market for inertial navigation is made with a special focus on the FOG niche. The principle of operation is briefly described; classification of existing FOGs is presented; their advantages and disadvantages are discussed; and some examples are given. Key Russian and international manufacturers are mentioned in the paper. Finally, trends of FOG development are analyzed, and the future development of the gyroscope market is assessed.
      PubDate: 2023-12-01
       
  • Optimization of Scientific Equipment Pointing at Survey Targets in the
           Uragan Experiment On Board the ISS

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      Abstract: The aim of the Uragan space experiment on board the International Space Station (ISS) is to adjust the scientific equipment and improve the methods for monitoring various objects and phenomena on the Earth. Part of this scientific equipment is already operated on board the station, and the other part is planned to be delivered in the orbit soon. In contrast to the Russian orbital stations Salyut and Mir, the ISS was not designed for pointing the installed equipment at the survey targets, because the gyrodines used on the American segment for the ISS attitude control had a too small kinematic momentum. For this reason, special methods and devices had to be developed for pointing the Uragan scientific equipment at the survey targets. This paper considers the methods for pointing the scientific equipment, which would optimize the research program of the Uragan experiment on board the ISS.
      PubDate: 2023-12-01
       
  • Real-Time Visual-Inertial Odometry Based on Point-Line Feature Fusion

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      Abstract: To improve the localization accuracy and tracking robustness of monocular feature-based visual SLAM systems in low-texture environments, a visual-inertial odometry method combining line features and point features is proposed, taking advantage of the easy availability of line features in real-world environments and the high accuracy of feature-based methods. The combination of point and line features ensures accurate positioning of the SLAM system in low-texture environments, while the inclusion of IMU data provides prior information and scale information. The pose is optimized by minimizing the reprojection error of point and line features and the IMU error using bundle adjustment. An improved EDlines algorithm is introduced, which incorporates a pixel chain length suppression process to enhance the effectiveness of extracted line features and reduce the rate of line feature misalignment. Experimental results on the public EuRoC dataset and TUM RGB-D dataset show that the proposed method meets the real-time requirements and has higher localization accuracy and robustness compared with the visual SLAM method based on single point feature or the method adding traditional line features.
      PubDate: 2023-12-01
       
  • Strapdown Inertial Navigation System Accuracy Improvement Methods Based on
           Inertial Measuring Unit Rotation: Analytical Review

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      Abstract: The paper presents the analytical review of an inertial measuring unit (IMU) rotation as a method to improve the accuracy of a strapdown inertial navigation system (SINS). There are two ways to improve the accuracy. One of them is based on the transformation of the error change pattern in the inertial sensors (IS) when using the IMU self-compensation rotation (SCR). The criteria for selecting an efficient SCR law to minimize the accumulated error in the parameters generated by SINS are presented. Along with the advantages of this technology, its weak points that may limit significantly the potentially achievable IMU accuracy are described. The other technique consists in increasing the observability of the IS error model components due to the IMU rotation while filtering the SINS errors. The IS error model is described, and the problem of recursive filtering of the SINS errors is stated to refine these errors, with the reference data on coordinates and motion velocity being available. The methods for quantifying the observability of the IS error model components are presented.
      PubDate: 2023-12-01
       
  • Techniques for Inspecting IMUs with Nonorthogonal Orientation of Their
           Sensitive Axes

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      Abstract: The paper discusses the techniques developed for inspecting inertial measurement units (IMU) with nonorthogonal orientation of their sensitive axes and the results of their application. The methodology was proposed as part of the development of IMUs for a strapdown inertial navigation system (SINS) during the modernization of the Soyuz-family spacecraft transport system under the International Space Station (ISS) program for six-axis units of angular rate sensors (ARS) and accelerometers with nonorthogonal orientation of their sensitive axes. Positive results of the ground-based and flight tests carried out aboard 86 Soyuz and Progress spacecraft from 2002 to 2023 have confirmed the effectiveness of the proposed methodology.
      PubDate: 2023-12-01
       
  • Identification of Motion Model Parameters for a Surface Ship under
           Disturbances

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      Abstract: An approach to identifying the parameters of the motion model for a surface ship subject to external disturbances is proposed. It uses the measurements of heading, yaw rate, speed through the water, and global satellite navigation system (GNSS) data. The model structure is set in the state space. We use the criterion of how close is the real vehicle response to a given control input to its motion model response under the same disturbances. It is proposed to apply the Kalman filter with the state vector including the disturbances, and an iterated procedure for estimating parameters by minimizing the criterion. It is shown that this ensures stable identification of model parameters under different disturbances. Simulation results are presented to evaluate the quality of identification. The approach was validated in full-scale tests of a high-speed boat.
      PubDate: 2023-12-01
       
  • SVD-Aided EKF for Nanosatellite Attitude Estimation Based on Kinematic and
           Dynamic Relations

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      Abstract: Small satellite attitude angles are estimated using measurements of star trackers and rate gyros in this study. The issue related to gyro drifts is overcome by adding the bias terms into the state vector in order to estimate them. As an estimation method, two-stage non-traditional filter is used. In the first stage, singular value decomposition (SVD) is used for determining the attitude measurements. As a second stage, an extended Kalman filter (EKF) is designed based on linear attitude measurements. These two stages are integrated for the whole estimation algorithm in order to have estimations with high accuracy, and it is called SVD-Aided EKF. The proposed SVD-Aided EKF is used with two attitude models of satellite: only the kinematics model which does not include the dynamics of a satellite, and both kinematics and dynamics relations. Several scales of uncertainties on the principal moment of inertia of the satellite are considered in order to determine the level when estimation error of the kinematics and dynamics-based filter exceeds the error of the case using only kinematics relations.
      PubDate: 2023-12-01
       
  • Nonlinear Effects in the Dynamics of HRG with Flat Electrodes

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      Abstract: Abstract—The paper addresses a hemispherical resonator gyroscope (HRG) with flat electrodes applied in the vehicle control and navigation. In order to enhance the gyro accuracy, we formulate the problem of constructing a new mathematical model describing the nonlinearities of the electromechanical system controlling the hemispherical resonator oscillations. The mathematical model of the resonator dynamics is based on Lagrange−Maxwell differential equations. The obtained nonlinear model is studied with the asymptotic Krylov−Bogolyubov averaging method. The reference voltage on flat control electrodes is shown to arouse systematic drift and changes in the resonance frequency. The provided example demonstrates the influence of reference voltage on the gyro drift and reduction in the resonator oscillation frequency.
      PubDate: 2023-12-01
       
  • Studying the Temperature Dependency of h-Parameter of the Fiber-Optic
           Gyroscope Coil

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      Abstract: The paper studies the temperature dependency of h-parameter of the fiber-optic gyroscope (FOG) coil. It has been shown that the thermal dependency of h-parameter behaves differently in positive and negative temperature ranges. It is noted that the polarization effect can severely limit the FOG accuracy in a broad temperature range. Ways to eliminate the polarization effect are proposed.
      PubDate: 2023-12-01
       
  • Some Features of Dynamics and Attitude Control of Nanosatellites in Low
           Orbits

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      Abstract: The paper summarizes the results of the research on angular motion dynamics carried out by the team of the authors and some problems of attitude control of nanosatellites (NS). The features of CubeSat NS passive motion dynamics are described. Conditions for the possible emergence of resonance modes are studied and discussed. Recommendations are given allowing the requirements for mass-inertia characteristics and initial conditions of NS motion to be formulated at the design stage, aimed at the NS stable motion with regard to the required equilibrium position for a wide range of orbital altitudes. Algorithms for reorientation and stabilization of NS motion are proposed based on the solution of the inverse problem of dynamics and selection of optimal nominal attitude control programs. The results of this work are implemented in practice and may be useful to the developers of small spacecraft.
      PubDate: 2023-09-01
      DOI: 10.1134/S2075108723030021
       
  • Deep Learning-Based Inertial Navigation Technology for Autonomous
           Underwater Vehicle Long-Distance Navigation—A Review

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      Abstract: Autonomous navigation technology is the key technology for Autonomous Underwater Vehicle (AUV) to achieve automated, intelligent operation and task processing. Inertial navigation technology is the core of autonomous navigation technology for AUV. Traditional inertial navigation technology has been developed for many years, and it is necessary to find new breakthroughs. Deep learning can automatically select and extract key features of input data, which has been widely used in image recognition, speech recognition, natural language processing and other fields, and has good results in processing sequential data such as text and speech. Inertial navigation data clearly belongs to this type of data, and many scholars in the industry have conducted related research and design, and found that deep neural network models can be used to calibrate the noise of inertial sensors, reduce the drift of inertial navigation mechanisms, and fuse inertial information with other sensor information, with good effects in solving the prediction and error suppression of inertial navigation during long-term underwater voyages. This article provides a comprehensive review of deep learning-based inertial navigation for AUV, including the latest research progress and development trend direction.
      PubDate: 2023-09-01
      DOI: 10.1134/S2075108723030070
       
  • Methodology of Optimal Control of Low-Thrust Spacecraft Transfer Between
           Halo Orbits Around the Earth-Moon L2 Libration Point

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      Abstract: Abstract—The paper considers the problem of optimal control of an electric propulsion spacecraft maneuvering between the spatial halo orbits around the L2 libration point in the Earth−Moon system. The proposed methodology finds the initial approximations for calculating the transfer trajectories within the framework of restricted three-body problem and improves the computational efficiency of calculations. A low-thrust transfer between the halo orbits is calculated to confirm the validity of this computational procedure.
      PubDate: 2023-09-01
      DOI: 10.1134/S2075108723030033
       
  • Tracking Estimator of the Ground Target Coordinates and Motion Parameters
           Using Onboard Optical Location System Data

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      Abstract: The features of tracking estimators of ground target coordinates and motion parameters in onboard optical location systems are considered. The structure of the developed tracking estimator using onboard optical location system data is described. Some simulation results are provided.
      PubDate: 2023-09-01
      DOI: 10.1134/S2075108723030082
       
  • Potential Application of MEMS-Based Inertial Aids in Automatic Control
           System of Airdrop Platforms: Experimental Study

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      Abstract: — The paper studies the possibility to use MEMS-based integrated INS/GNSS systems in the automatic control systems of precision airdrop systems (PAS ACS). Experiments have been conducted to find a navigation solution during the parachute descent. The PAS ACS prototype with remote control and guidance based on the data of a MEMS-based integrated INS/GNSS system has been developed. Flight tests of the designed prototype have been carried out.
      PubDate: 2023-09-01
      DOI: 10.1134/S2075108723030045
       
  • A Procedure of Comparative Analysis of Recursive Nonlinear Filtering
           Algorithms in Navigation Data Processing Based on Predictive Simulation

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      Abstract: The paper describes a procedure based on predictive simulation for comparing the recursive suboptimal algorithms developed for nonlinear filtering problems including navigation data processing problems. The algorithms are compared in terms of accuracy, consistency, and computational complexity. The provided examples explain the procedure and illustrate its application.
      PubDate: 2023-09-01
      DOI: 10.1134/S2075108723030094
       
  • Use of Marine Gravimetric Survey Data for Correcting the Satellite Models
           of the Global Gravity Field in the World Ocean

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      Abstract: — The article studies the possibilities of using the high-precision marine gravimetric survey data to correct the global models of the Earth’s gravity field in the World Ocean. The accuracy of modern models in water areas on a regional scale is determined by the capabilities of the satellite altimetry method and depends on the gravity field characteristics. On the gradient structures of the field, the amplitudes of real anomalies are suppressed in the models; therefore, for the models to be used more efficiently, it is necessary to restore high frequencies of anomalies in these models. On the abyssal structures, the main error in models is high-frequency noise. This paper describes the techniques for correcting the data obtained from these models, which makes it possible to increase the accuracy over fairly large areas, using a limited number of marine gravimetric measurements. The paper also provides the practical assessments of the new global altimetry model of the Earth’s gravity field Sandwell and Smith v.32 in various regions of the World Ocean.
      PubDate: 2023-09-01
      DOI: 10.1134/S2075108723030057
       
  • Calibration of Onboard Magnetometers of the Attitude Control System of the
           SamSat-ION University Nanosatellite

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      Abstract: This work is focused on the calibration of magnetometers for the attitude control system of the SamSat-ION university nanosatellite. A calibration methodology is proposed to take into account the temperature drift of the sensors readings. Measurements are carried out in twelve static positions, with sequential cooling and heating in the temperature range from –10 to +50°С, and are used to calculate the estimates of the temperature dependences of the bias, scale factor, and nonorthogonalities of the magnetometer axes. The main results of the ground tests of the SamSat-ION onboard systems obtained in accordance with the proposed methodology are discussed. The operability of the onboard systems during and after calibration under temperature variations (rise and drop) has been confirmed. Taking into account the found parameters, affected by various temperature gradients, decreases the measurement error about twelve-fold, which makes it possible to ensure reliable operation of the attitude control and stabilization system of nanosatellites that include magnetometers.
      PubDate: 2023-09-01
      DOI: 10.1134/S2075108723030069
       
 
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  Subjects -> AERONAUTICS AND SPACE FLIGHT (Total: 124 journals)
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