This paper addresses the issue regarding dead zones in interferometric closed loop fiber optic gyros (FOGs). The causes of dead zones and their suppression methods are analyzed. Test methods for dead zone detection and measurement are discussed. Dead zone values are presented for FOGs produced by var ious companies-both Russian (Optolink, Perm Research and Production Instrument Company, and Elek tropribor) and foreign (Honeywell and IXSEA).
This paper presents the development and test results of a fiber optic gyro of 0.01 deg/h accuracy grade designed at Concern CSRI Elektropribor, JSC, in cooperation with St. Petersburg State University of Information Technologies, Mechanics, and Optics. The problems regarding gyro accuracy, stability of output characteristics, drift compensation, dead zone suppression, and the magnetic field effect are discussed.
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