F3G80 Three-Axis FOG

Strong Environmental Adaptability
High Reliability, Ultra-Long Lifetime
Fully DigitalRS-422 Electrical Interface Output

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Description

Main Features

Miniature Compact Design
All-Solid-State Design
Strong Environmental Adaptability
High Reliability, Ultra-Long Lifetime
Fully DigitalRS-422 Electrical Interface Output

Application Fields

EO Pod
Flight Control Platform
Optical/Photography Platform
Platform Stabilization Device
SatCom-on-the-Move
Inertial Measurement Unit
Lightweight UAV

Product Overview

The F3G80 miniaturized FOG breaks through traditional design with integrated circuit and optical path. It is an ideal high-precision angular rate sensor for inertial measurement and control. As a fully solid-state gyroscope, it features fast start-up, wide range, and high reliability. The F3G80 three-axis FOG assembly adopts three-axis sharing and split design for low cost and stable performance. With integrated optical-electrical packaging, it is simple to install, suitable for navigation guidance, attitude measurement, and control in small missiles and guided bombs.

Unique Technology

Company is a high-tech enterprise with full closed-loop capabilities from fiber winding equipment and coil winding to IMU circuits, software, and test equipment. End-to-end process control improves quality and reduces costs. Operating under ISO9001 with strict processes, it ensures product reliability and consistency. When GPS signals are poor, the F3G80 continues precise navigation using known heading, orientation, and velocity-the basic principle of inertial navigation-while also correcting excessive positioning deviations during GPS outages.

F3G80 Three-Axis FOG

F3G80 Three-Axis FOG Performance Parameters

Parameter	A	B	C
Start-up Time(s)	5	5	5
Null Offset(°/h)	≤0.3	≤0.3	≤0.3
Constant Temp. Bias Stability(10s avg. ,°/h)	≤0.020	≤0.015	≤0.01
Constant Temp. Bias Stability(100s avg. ,°/h)	≤0.010	≤0.008	≤0.005
Variable Temp. Bias Stability(100s avg. ,1℃/min,°/h)	≤0.08	≤0.06	≤0.05
Bias Repeatability(°/h)	≤0.020	≤0.015	≤0.010
Angle Random Walk(°/√h)	≤0.002	≤0.002	≤0.001
Bias Magnetic Sensitivity(°/h/Gs)	≤0.005
Scale Factor Nonlinearity(ppm)	≤20
Scale Factor Asymmetry(ppm)	≤20
Scale Factor Repeatability(ppm)	≤20
Threshold(°/h)	≤0.01
Resolution(°/h)	≤0.01
Bandwidth(Hz)	≥200
Operating Temperature(℃)	-45～+65
Storage Temperature(℃)	-55～+80
Dynamic Range(°/s)	±300
Supply Voltage(V)	±5
Steady-State Power Consumption(W)	≤5.5
Full-Temp. Steady-State Power Consumption(W)	≤10
Start-up Inrush Current(A)	＜2
Dimensions(mm)	(Sensor Head)Φ76×18/(Electronic Box)60×60×28
Weight(g)	＜900

Dimensional Drawing

product-675-455

Sensor Head Section

product-769-435

Electronic Box Section

Introduction

Fiber optic gyro, as a new type of all-solid-state gyro, has the advantages of quick startup, wide measurement range and high reliability. Among them, F3G80 fiber optic gyro inertial combination is for the demand of medium and high precision application background, adopting three-axis common technology, as well as split design, low cost, stable performance; structure adopts the optical circuit and circuit integrated package, simple structure, easy to install, and it can be applied to small missiles and guided bombs in the navigation and guidance, attitude measurement and control systems.

1.1 Application

This manual is only applicable to F3G80 type products and contains performance index, technical conditions, external dimensions and installation and use. Among them, the technical conditions include the product's environmental range, electrical performance, and physical characteristics.

1.2 Main parameters

1.2.1 The main performance index of fiber optic gyroscope:

Table 1 Product main performance index

No.	Test items	Unit	Technical Requirement
Selectable Accuracy Levels			A	B	C
1	Activation Time	s	5	5	5
2	Zero Position	(°)/h	≤0.3	≤0.3	≤0.3
3	Bias Stability at Constant Temperature	(°)/h	≤0.020 (10s smoothing) ≤0.010 (100s smoothing)	≤0.015 (10s smoothing) ≤0.008 (100s smoothing)	≤0.01 (10s smoothing) ≤0.005 (100s smoothing)
4	Bias Stability at Variable Temperature (1°C/Min, 100s Smoothing)	(°)/h	≤0.08	≤0.06	≤0.05
5	Bias Repeatability	(°)/h	≤0.020	≤0.015	≤0.010
6	Random Walk Factor	(º) /h^1/2	≤0.002	≤0.002	≤0.001
7	Bias Magnetic Sensitivity	(°)/h/Gs	≤0.005
8	Scale Factor Nonlinearity	ppm	≤20
9	Scale Factor Asymmetry	ppm	≤20
10	Scale Factor Repeatability	ppm	≤20
11	Thresholds	(°)/h	≤0.01
12	Resolution	(°)/h	≤0.01
13	Bandwidths	Hz	≥200
14	Operating Temperature	℃	-45 to +65
15	Storage Temperature	℃	-55 to +80
16	Dynamic Range	(°)/s	±300
17	Voltage	V	±5
18	Steady-State Power	W	≤5.5
19	Full Temperature Steady State Power	W	≤10
20	Starting Instantaneous Current	A	<2
21	Product Weight	g	<900

2 Communication Protocol

2.1 Fiber Optic Gyro Communication Protocol

Interface form: EIA-RS422 compliant;

Baud rate: 921600bps;

Data format: 1 start bit, 8 data bits, 1 stop bit, no parity.

Data update rate: 4kHz

No.(Byte)	Content	Bytes	Data Type	Notes
1	frame header	1	UCHAR8	OxEB
2	frame header	1	UCHAR8	0x90
3	frame number	1	UCHAR8	frame count
4~6	X-axis gyro data	3	INT24
7	X temperature	1	CHAR8
8-10	Y-axis gyro data	3	INT24
11	Y temperature	1	CHAR8
12-14	Z-axis gyro data	3	INT24
15	Z temperature	1	CHAR8
16	checksum	1	UCHAR8	check

Remarks:

Data frames are multibyte data, with the low byte sent first, followed by the high byte;

The effective gyro data is a 32-bit signed integer with the highest bit being the sign bit;

The valid temperature data is 8-bit signed integer, the highest bit is the sign bit, and the temperature scale factor is 1LSB/°C. The check byte is the sum of the data from byte 1 to byte 15, and the lower 8 bits are taken;

Gyro data is in incremental form, i.e., the incremental value of the gyro's angle over the time of the sending cycle.

3 Wiring Definitions

The connector that connects the product to the outside is J30JZLN9ZKCA000, as defined in Table 3.

Pin	Pin Definition	Color	Remarks
1, 6	Power +5V	Red	Power Input
2, 7	GND	Black
3	Power -5V	White
5	Serial Port: Transmit+	Yellow
9	Serial Port: Transmit -	Orange
4	Serial Port: Receive+	Blue
8	Serial Port: Receive -	Green