Recent Investigations on FOG Technology under Vibration, the way forward to Inertial Navigation System

摘要

Improving FOG (Fiber Optic Gyroscopes) behavior under mechanical environment is generally considered as an important technological challenge, since the FOG interferometer is sensitive to very small variations of the overall optical path. Achieving 0.1°/h gyroscopic performances requires solutions to handle as low as 10"7 relative variation of the optical path.Different possible improvements have been investigated at IXSEA to design vibration resistant FOGs. These efforts have led to interesting results that will be presented: 0.1°/h FOGs have been demonstrated under harsh mechanical environments (up to 12g rms vibration level) without complex mechanical isolation.