System based on fiber optic gravimeters for a measurement of gravitational field gradient vector for navigation of flying objects

Yuri A. Bykovsky; Constantin A. Scvorchevsky; Andrey Y. Beskurnikov; Olga V. Poljakova; Alexander P. Grachev; Alexander V. Shutov

doi:10.1117/12.277218

26 June 1997 System based on fiber optic gravimeters for a measurement of gravitational field gradient vector for navigation of flying objects

Yuri A. Bykovsky, Constantin A. Scvorchevsky, Andrey Y. Beskurnikov, Olga V. Poljakova, Alexander P. Grachev, Alexander V. Shutov

Author Affiliations +

Proceedings Volume 3087, Navigation and Control Technologies for Unmanned Systems II; (1997) https://doi.org/10.1117/12.277218
Event: AeroSense '97, 1997, Orlando, FL, United States

Abstract

There are many tasks, which are required simultaneously to measure value and direction of gravitation field vector in 3D space. For instance, the task of flying objects navigation by measurement of full gravitation field vector horizontal gradient. To solve this problem is suggested the system, consists of two remote fiber-optic gravimeters, situated in different ends of flying object. Fiber-optic gravimeter based on effect of influence of longitudinal strains of silicon single-mode fibers on lightwave phase shift. Fiber-optic gravimeter includes fiber-optic interferometers Mach-Zehnder and electronic scheme for measurement of phase shift. Sensitivity of this fiber-optic gravimeter is 10^-7 g, where g-acceleration of free fall, if resolution of electronic scheme is 10^-3 rad. As source of radiation for fiber-optic gravimeter is employed tunable diode laser on GaAlAs-GaAs with external dispertial cavity and frequency modulation of radiation. Frequency modulation of radiation is applied for measurement of phase shift in fiber-optic interferometers.

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Yuri A. Bykovsky, Constantin A. Scvorchevsky, Andrey Y. Beskurnikov, Olga V. Poljakova, Alexander P. Grachev, and Alexander V. Shutov "System based on fiber optic gravimeters for a measurement of gravitational field gradient vector for navigation of flying objects", Proc. SPIE 3087, Navigation and Control Technologies for Unmanned Systems II, (26 June 1997); https://doi.org/10.1117/12.277218

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KEYWORDS

Fiber optics

Phase shifts

Navigation systems

Fiber optics tests

Interferometers

Phase measurement

Electroluminescence

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