Precise laser gyroscope for autonomous inertial navigation

Kuznetsov, A. G.; Molchanov, A. V.; Chirkin, M. V.; Izmailov, E. A.

doi:10.1070/qe2015v045n01abeh015420

Cited by 30 publications

(5 citation statements)

References 22 publications

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“…Depending on the application, for example, for the use in inertial navigation systems in aircraft, ships and spacecraft [ 13 , 60 , 61 , 62 ], the entire laser gyroscope unit should be compact and highly durable in the presence of spurious vibrations, which generally comes at the price of reduced sensitivity. Nevertheless, most of the applications are well satisfied with typical sensitivity of 0.1/h and 0.001/h–0.0001/h for spacecraft and submarines, respectively ( Figure 3 ).…”

Section: Sagnac Effectmentioning

confidence: 99%

Rotation Active Sensors Based on Ultrafast Fibre Lasers

Kudelin

Sugavanam

Chernysheva

2021

Sensors

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Gyroscopes merit an undeniable role in inertial navigation systems, geodesy and seismology. By employing the optical Sagnac effect, ring laser gyroscopes provide exceptionally accurate measurements of even ultraslow angular velocity with a resolution up to 10−11 rad/s. With the recent advancement of ultrafast fibre lasers and, particularly, enabling effective bidirectional generation, their applications have been expanded to the areas of dual-comb spectroscopy and gyroscopy. Exceptional compactness, maintenance-free operation and rather low cost make ultrafast fibre lasers attractive for sensing applications. Remarkably, laser gyroscope operation in the ultrashort pulse generation regime presents a promising approach for eliminating sensing limitations caused by the synchronisation of counter-propagating channels, the most critical of which is frequency lock-in. In this work, we overview the fundamentals of gyroscopic sensing and ultrafast fibre lasers to bridge the gap between tools development and their real-world applications. This article provides a historical outline, highlights the most recent advancements and discusses perspectives for the expanding field of ultrafast fibre laser gyroscopes. We acknowledge the bottlenecks and deficiencies of the presented ultrafast laser gyroscope concepts due to intrinsic physical effects or currently available measurement methodology. Finally, the current work outlines solutions for further ultrafast laser technology development to translate to future commercial gyroscopes.

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Section: Sagnac Effectmentioning

confidence: 99%

Rotation Active Sensors Based on Ultrafast Fibre Lasers

Kudelin

Sugavanam

Chernysheva

2021

Sensors

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“…Because this AGV suspension system is more complex than a traditional AGV [25] , its mechanical system is first simplified as follows:…”

Section: -Dof Dynamics Model Of Agvmentioning

confidence: 99%

Dynamics model and simulation of outdoor AGV obstacle crossing without 3D model

Zhao

Xiu

Yuan

et al. 2023

Int J Adv Manuf Technol

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In this study, an outdoor Automated guided vehicle (AGV) with an absorbent vibration system was designed, and a 7-DOF model was established for this system. We built a simulation model in Simulink software that serves as the 7-DOF model. The three indicators for evaluating the stability of the AGV are simulated and analyzed in the simulation model when one side of the AGV crosses a sloping obstacle. A vibration absorptive property experiment of the AGV was performed, and the average maximum displacement of the AGV sprung mass was 13.42 mm. The maximum predicted amplitude of sprung mass in the Simulink simulation model is 12.8mm, and its prediction error is about 4.6%. The prediction accuracy of the Simulink model is higher than that of the Adams simulation method. According to the efficiency comparison experiment of the AGV obstacle crossing simulation method, the obstacle crossing simulation method based on Simulink designed in this paper saves about 28% of the working time of the designer compared with the traditional Adams simulation method, which provides a new idea for the simulation method of outdoor AGV obstacle crossing before the 3D model is established.

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“…This is primarily attributed to their extremely low coefficient of thermal expansion (CTE) and their manufacturability, which allows for the production of large material blanks with outstanding optical homogeneity. Such materials have provided a significant impetus to the development of such areas as astronomy [3,4], ultra-precision metrology [5], the fabrication of navigation devices [6,7], and novel nanometer precision manufacturing techniques, such as extreme ultraviolet lithography [8,9]. The unique thermo-mechanical characteristics exhibited by LAS glass-ceramics can be ascribed to the carefully regulated process of crystallization, facilitating the formation of β-eucryptite LiAlSiO 4 solid solutions [10,11].…”

Section: Introductionmentioning

confidence: 99%

Tuning the Coefficient of Thermal Expansion of Transparent Lithium Aluminosilicate Glass-Ceramics by a Two-Stage Heat Treatment

Naumov,

Shakhgildyan,

Golubev

et al. 2023

Ceramics

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Transparent glass-ceramics with a Li2O–Al2O3–SiO2 (LAS) system have been extensively utilized in optical systems in which thermal stability is of utmost importance. This study is aimed to develop thermal treatment routes that can effectively control the structure of transparent LAS glass-ceramics and tune its thermal expansion coefficient within a wide range for novel applications in photonics and integrated optics. The optimal conditions for the nucleation and crystallization of LAS glass were determined by means of differential scanning calorimetry and a polythermal analysis. XRD, Raman spectroscopy, and TEM microscopy were employed to examine the structural changes which occurred after heat treatments. It was found that the second stage of heat treatment promotes the formation of β-eucryptite-like solid solution nanocrystals, which enables effective control of the coefficient of thermal expansion of glass-ceramics in a wide temperature range of −120 to 500 °C. This work provides novel insights into structural rearrangement scenarios occurring in LAS glass, which are crucial for accurately predicting its crystallization behavior and ultimately achieving transparent glass-ceramics with desirable properties.

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Precise laser gyroscope for autonomous inertial navigation

Cited by 30 publications

References 22 publications

Rotation Active Sensors Based on Ultrafast Fibre Lasers

Rotation Active Sensors Based on Ultrafast Fibre Lasers

Dynamics model and simulation of outdoor AGV obstacle crossing without 3D model

Tuning the Coefficient of Thermal Expansion of Transparent Lithium Aluminosilicate Glass-Ceramics by a Two-Stage Heat Treatment

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