METHOD AND APPARATUS FOR INITIALIZATION OF A FIBER OPTIC GYROSCOPE

摘要

A method and apparatus are provided for initializing a closed-loop fiber optic gyroscope system of the type that includes a fiber optic gyroscope for generating an interferometric measurement of phase shift and a demodulator for converting the gyroscope output to a corresponding value in a predetermined format for application to a feedback integrator. In contrast to prior art methods and apparatus that require recapture, the present invention relies upon the concept of resetting the initial value received from the gyro to a corresponding value that lies within the zeroeth fringe of a gyro output. The feedback integrator includes an arithmetic unit with feedback. The resetting process consists of the performance of an operation upon the value. Such operations include shifting and copying functions when the predetermined format is two's- complement logic, integer function when the predetermined format is fixed point logic and both INTEGER and ROUND functions when the predetermined format is floating point logic.