Accession Number : ADP005714

Title :   A Prototype Fibre Optic Gyroscope for Missile Guidance Applications,

Corporate Author : BRITISH AEROSPACE DYNAMICS GROUP STEVENAGE (ENGLAND) STEVENAGE DIV

Personal Author(s) : Kay, C. J.

Report Date : DEC 1987

Pagination or Media Count : 13

Abstract : This paper describes the design of a prototype fibre optic gyro, which is intended for missile guidance applications. Important design constraints for the next generation of missiles are wide dynamic range, rapid switch-on, extreme ruggedness, low cost, and digital operation. These features are all embodied in the design described, which employs optical phase modulation in an integrated optical waveguide device. This also incorporates a Y-branch beam-splitter. Serrodyne phase ramps are impressed on the light propagating round the fibre optic sensor coil connected to the integrated optics chip, and rotation rate is measured by the serrodyne frequency needed to null the rotation-induced Sagnac phase shift. The gyro performance (drift and random walk), and errors up to 1000 deg/Sec., is presented.

Descriptors :   *GYROSCOPES, *FIBER OPTICS, GUIDANCE, CONTROL SYSTEMS, PHASE MODULATION, OPTICAL WAVEGUIDES, BEAM SPLITTING, ROTATION, PHASE SHIFT, DRIFT, ERRORS, MICROPROCESSORS, CORRECTIONS, GUIDED MISSILE COMPONENTS, GREAT BRITAIN.

Subject Categories : Air Navigation and Guidance
      Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE