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Phase domain model of a second order fiber-optic gyroscope dynamic system

In this paper, we have developed a phase-domain model to analyze a nonlinear fiber-optic gyroscope (FOG) system theoretically, and use it to obtain an optimal-designed system. System's design including details of signal processing is described here and used to improve system's sensitivity and precision. From computer's simulation and experimental results, we know that 1. The experimental results coincide with the analytic results, with error less than 4% in the respects of rise time, overshooting, and steady state error; that is proved by the computer simulation for the time domain response of a step and a ramp input tests. 2. Using the phase-domain model, one can build up one's optimal FOG system with zero steady state error, 6% overshooting, high stability, and short rise time about one of system's natural frequency, i.e. 1spl omegasub n/.<<ETX>>