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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

Category	Indicator	FG-120H	FG-120C	FG-98H
Category	Indicator
Performance Indicators	Bias (°/h)	0.25	0.25	0.3
	Bias Stability① (°/h, 1σ)	0.003	0.005	0.01
	Bias Stability② (°/h, 1σ)	0.001	0.0015	0.003
	Bias Stability③ (°/h, full temperature, 1σ)	0.005	0.01	0.01
	Bias Repeatability (°/h, 1σ)	0.001	0.0015	0.003
	Bias Magnetic Sensitivity (°/h/Gs)	0.003	0.003	0.005
	Random Walk (°/h ½)	0.0002	0.0003	0.0005
	Scale Factor Nonlinearity (ppm)	2	2	5
	Scale Factor Asymmetry (ppm)	2	2	2
	Scale Factor Repeatability (ppm)	5	5	5
	Dynamic Range (°/s)	±300	±300	±300
	Start-up Time (s)	3	3	3
	Bandwidth (Hz, -3db)	≥200	≥200	≥200
Mechanical/Electrical Interface	Dimensions (mm)	120×120×36	120×120×36	98×98×33.5
	Weight (g)	890±20	890±20	520±20
	Room Temperature Steady-State Power Consumption (W)	≦2.5	≦2.5	≦2.5
	Supply Voltage(V)	+5	+5	+5
	Operating Temperature (℃)	-45~+70	-45~+70	-45~+70
	Storage Temperature (℃)	-55~+85	-55~+85	-55~+85
	Vibration (1σ, 20Hz~2000Hz)	6.06g	6.06g	6.06g
	Shock (g, ms, 1/2sin)	30g, 6ms-8ms	30g, 6ms-8ms	30g, 6ms-8ms
	Communication Interface	RS422, etc.	RS422, etc.	RS422, etc.