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Product Introduction

FG-70/70C/70H is a fully solid-state, digital closed-loop, tactical-grade single-axis fiber optic gyroscope. Based on the SAGNAC principle, it consists of an SLD light source, fiber coupler, photodetector, integrated optical phase modulator, fiber sensing coil, circuit, and structure. The C model is an upgraded version of the FG-70, featuring high stability and reliability while delivering enhanced performance indicators. The H model adopts higher-grade components and stricter manufacturing and testing processes, achieving navigation-grade gyroscope performance. They are widely used in the fields of navigation, and control.

Product Features

· Single 5V power supply

· Excellent full-temperature performance

· Excellent start-up performance: meets nominal indicators instantly after power-on, no warm-up required

· Excellent environmental adaptability, resistant to strong shock and vibration

· Interference fringe recognition technology, supporting full dynamic range cold start

· High reliability

· No dead zone

Applications

· High-precision stabilized platforms

· Positioning and orientation systems

· North Seeker

· Attitude and heading reference systems (AHRS)

· Fiber optic compasses

· Strapdown inertial navigation systems (SINS)

Technical Indicators

Technical Reference / Model	FG-70	FG-70C	FG-70H
Start-up Time (s)	3
Dynamic Range (°/s)	±500	±300	±300
Bias (°/h)	≤0.5
Bias Stability① (°/h, 1σ)	≤0.1	≤0.05	≤0.03
Bias Stability② (°/h, 1σ)	/	≤0.02	≤0.01
Bias Stability③ (°/h, full temperature, 1σ)	≤0.2	≤0.1	≤0.05
Bias Repeatability (°/h, 1σ)	≤0.05	≤0.02	≤0.01
Bias Magnetic Sensitivity (°/h/Gs)	≤0.05	≤0.05	≤0.01
Random Walk (°/h ½)	≤0.01	≤0.005	≤0.003
Scale Factor Nonlinearity (ppm)	≤10
Scale Factor Asymmetry (ppm)	≤5
Scale Factor Repeatability (ppm)	≤10
Threshold (°/h)	≤0.05	≤0.03	≤0.01
Resolution (°/h)	≤0.05	≤0.03	≤0.01
Bandwidth (Hz)	≥500
Supply Voltage (V)	+5
Steady-State Power Consumption (W)	≤2.5
Full-Temperature Steady-State Power Consumption (W)	≤4
Start-up Instantaneous Current (A)	<1.5
Dimensions (mm)	70×70×30		70×70×31
Weight (g)	200±10		220±10
Communication Interface	RS422
Operating Temperature (℃)	-45~+70
Storage Temperature (℃)	-55~+85
Vibration (1σ, 20Hz~2000Hz)	6.06g
Shock (g, ms, 1/2sin)	30g, 6ms-8ms
Mean Time Between Failures (h)	8000