Fiber Optic Gyroscope (FOG)

FOG assembly is an important part of spacecraft attitude & orbit control system. It uses Sagnac effect in fiber coil to detect rotation component about a sensing axis, and transmits that information to central computer via bus to realize control of spacecraft attitude & orbit. As an upgrade of mechanical gyroscope, FOG is a key product for spacecraft attitude & orbit...

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Introduction

FOG assembly is an important part of spacecraft attitude & orbit control system. It uses Sagnac effect in fiber coil to detect rotation component about a sensing axis, and transmits that information to central computer via bus to realize control of spacecraft attitude & orbit. As an upgrade of mechanical gyroscope, FOG is a key product for spacecraft attitude & orbit control. 



            micro triaxial FOG                      dual light sources four-axis FOG

Features

a.small size

b.lightweight

c.no mechanical part

d.high reliability


Specifications
Item micro uniaxial FOG micro triaxial FOG Unit
Weight ≤180 ≤450 g
Dimensions 52Í52Í40 79.5Í79.5Í50 mm3
Power Consumption ≤3.5 ≤2 W
Bias Stability ≤3 <0.4 °/h
Bias Repeatability ≤3 <0.4 °/h
Random Walk Coefficient ≤0.3 <0.04 °/h1/2
Threshold ≤1 ≤0.3 °/h
Scale Factor Repeatability ≤200 <50 ppm
Scale Factor Nonlinearity ≤200 <50 ppm
Dynamic Range ±300 ±300 °/s


Applications
Product Mission Record or Plan
micro tri-axial FOG KZ-1 2013
micro tri-axial FOG Shijian series satellite ——
dual light sources four-axis FOG Shijian series satellite ——