Abstract
A novel interferometric fiber optic gyroscope (IFOG) for space application is presented. The IFOG is composed of two sources and four independent axes. The sources are shared by all axes to decrease power consumption and save cost. The redundant optical channels and components are applied to eliminate single point failures. A random walk coefficient (RWC) prediction model is developed using a radiation-induced attenuation model of fiber and a RWC expression. Based on the model and the IFOG structure, a failure diagnosis strategy and recovery processing are proposed, and verified by results of radiation tests and fault injection experiments.
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