IFOG Technology for Gyrocompass Applications,

Abstract

Interferometric fiber optic gyros (IFOGs) were fabricated and evaluated to demonstrate the feasibility of their use as rotation rate sensors within replacement gyrocompass systems. Bias repeatability of 0.008 deg/hr, input axis misalignment repeatability of 0.68 arcsec, scale factor repeatability of 4.5 ppm, and angle random walk of 0.0034 deg/hr were demonstrated. The measured gyro performance was included within system simulations to predict overall system performance for a series of gyrocompass scenarios. The results of the simulations showed that when mechanized with IFOGs similar to those tested, the performance specifications of the AN/WSN-2/2A gyrocompass can be achieved without the need for a vertical axis turntable for periodic self-calibration. IFOGs were shown to be a strong candidate for the rotation rate sensors within upgrades and future Navy gyrocompass systems.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1996
Accession Number
ADA308436

Entities

People

  • Allan Brockstein
  • Amado Cordova
  • David Rozelle
  • Eric Goldner
  • Joseph Defato

Organizations

  • Naval Command, Control and Ocean Surveillance Center

Tags

DTIC Thesaurus Topics

  • Calibration
  • Misalignment
  • Random Walk
  • Rotation
  • Simulations
  • Specifications
  • Turntables

Readers

  • Aerospace Test and Evaluation
  • Inertial Navigation Systems.