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- Title
Finite Element Analysis of the Influence of Ambient Temperature Variations on the Performance of Fiber Optic Gyroscope Sensing Coils.
- Authors
Ramadass, Gidugu Ananda; VedachaJam, Narayanaswamy; Umapathy, Arunachalam; Ramesh, Raju; Balanagajyothi, Vandavasi
- Abstract
Time transience-related nonreciprocal effect due to ambient temperature variations has significant influence in the bias stability performance of interference-type fiber optic gyroscopes (l-FOG). This paper presents the thermal finite element analysis (FEA) done on a 10-km-long l-FOG sensing coil wound with a diameter of 10 cm in a bipolar configuration for identifying its bias performance during ambient temperature variations. Results indicate that, with a sampling frequency of 0.5 kHz, the ambient temperature variation of 0.5°/min could degrade the bias stability performance of the l-FOG to tactical grade level, while maintaining ambient temperature variation within 0.017min is required to attain bias stabilities >0.0017h, the performance required for the strategic grade applications. It is also identified that in a temperature stabilized environment, sensing coil with 10 and 40 layers requires a thermal stabilization time of about 9 and 26 min, respectively.
- Subjects
FINITE element method; SEASONAL temperature variations; OPTICAL gyroscopes; SAMPLING (Process); DETECTOR circuits
- Publication
Marine Technology Society Journal, 2017, Vol 51, Issue 1, p16
- ISSN
0025-3324
- Publication type
Article
- DOI
10.4031/MTSJ.51.1.2