F3X100 Three-Axis FOG IMU

 

 

 

• Mobile survey & attitude
• Unmanned systems (ground/marine/UW)
• Surveying & north-finding
• Stabilized platforms
• SATCOM-on-the-move
• Autonomous driving & munitions

 

 

Company's F3X100 is a three-axis FOG IMU purpose-built for the navigation, guidance, and attitude control systems of small missiles and guided bombs. Comprising three all-solid-state FOGs, three quartz accelerometers, and a data packaging board, it measures angular velocity and linear acceleration to support attitude and navigation control. Its all-solid-state architecture eliminates moving parts for excellent shock and vibration resistance, and RS-422 serial output enables seamless system integration in high-dynamic precision guidance and attitude measurement applications.

 

 

Company is a high-tech enterprise with full closed-loop capabilities from fiber winding equipment and coils to FOGs, fiber/MEMS inertial products, 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.

 

 

Parameter	H	M
Fiber Optic Gyroscope
RT Bias Repeatability (run-to-run, day-to-day) (°/h)	≤0.05	≤0.1
Constant-Temp Bias Stability (°/h)	≤0.05	≤0.1
RT SF Repeatability (ppm)	≤20	≤20
Constant-Temp SF Asymmetry (ppm)	≤20	≤20
Constant-Temp SF Nonlinearity (ppm)	≤30	≤30
Threshold (°/h)	≤0.1 º/ h
Angular Rate Range (°/s)	-500～+500 º/s
Bandwidth (Hz)	≥200
Dimensions (mm)	100*100*95
Weight (g)	1100±50 (with accelerometer)
Operating Temperature (°C)	-45～+65
Quartz Accelerometer
Range (g)	≥±30
SF Temp Coeff (ppm/°C)	≤60
SF Monthly Stability (ppm)	≤60
Bias (mg)	≤±7
Bias Temp Coeff (μg/°C)	≤60
Bias Monthly Stability (μg)	≤60
2nd-Order Nonlinearity (μg/g²)	≤60
Mounting Angle (")	≤200
Appearance	No scratches, cracks, or corrosion

 

 

 

 

Fiber optic gyro, as a new type of all-solid-state gyro, has the advantages of fast startup, wide measurement range and high reliability. Among them, F3X100-IMU type fiber optic gyro inertia set is designed for the needs of medium and low precision application background, adopting three-axis shared technology design, low cost and stable performance; the structure adopts the integrated package of optical circuit and circuit, simple structure, easy installation, and it can be applied in the system of navigation and guidance, attitude measurement and control of small missiles, guided bombs, and so on.

 

1.1 Application

This instruction manual only applies to the F3X100-IMU type product, and contains performance specifications, 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

Main parameters	Index
Type	H	M
Bias Repeatability at Room Temperature (By times, by days) (º/h)	≤0.05	≤0.1
Bias stability at Constant Temperature (º/ h)	≤0.05	≤0.1
Scale Factor Repeatability at Room Temperature (ppm)	≤20	≤20
Scale Factor Asymmetry at Constant Temperature (ppm)	≤20	≤20
Scale Factor Nonlinearity at Constant Temperature (ppm)	≤30	≤30
Threshold (º/h)	≤0.1 º/h
Angular Rate Range (º/s)	-500 to +500 º/s
Bandwidth (Hz)	≥200
Dimensions (mm)	100*100*95
Weight (g)	1100±50 (with accelerometer)
Operating Temperature (°C)	-45 to +65

 

Quartz Accelerometer Parameters

No	Item	Technical Requirement
1	Range (g)	≥±30
2	Scale Factor Temperature Coefficient (ppm /°C)	≤60
3	Scale Factor Monthly Stability (ppm)	≤60
4	Bias (mg)	≤±7
5	Bias Temperature Coefficient (μg /°C)	≤60
6	Bias Monthly Stability (μg)	≤60
7	Second-order Nonlinear Coefficient (μg /g2)	≤60
8	Mounting angle (")	≤200
9	Outlook	No scratch No crack No corrosion

 

1.2.2 Mechanical testing

1.2.2.1 Sinusoidal Scanning Vibration

The gyro is fixed on the vibration table through the fixture according to the direction of vibration, and the gyroscope carries out sinusoidal scanning in 3 directions, corresponding to the X-axis, Y-axis, and Z-axis directions, respectively. Vibration steps; vibration table plus excitation, to the gyroscope power, after a certain period of warm-up (gyro start-up time), test the output value of the gyroscope, about 5min; sinusoidal vibration. Vibration conditions: 20Hz-2000Hz, scanning time 5min, amplitude 4.2g. vibration process, record the gyroscope output.

Random Vibration

Vibration Frequency: 20Hz~2000Hz

Vibration Time: 5min for each axis

Vibration Direction: X, Y, Z axis

Vibration Spectrum: see Figure

Index requirements:

 

 

Fiber optic gyro shall be no resonance with sinusoidal scanning in the range of 20 HZ to 2000 Hz;

Random vibration: the absolute value of the bias in the vibration and the average bias before and after the vibration shall be less than 0.05º/h.

1.2.2.2 Mechanical shocks are as required by Table 2.

Table 2 Impact test conditions

Peak Acceleration (g)	30
Duration (ms)	11
Times of Impacts	3 times in each direction
Waveform	half-sine wave
Directions	X, Y, Z
	Note: The interval between two impacts is not less than 1.5s.

Impact process, the product should be able to work normally after mechanical impacts in the state of electricity, the bias should be less than 0.05º/h before and after the impact.

 

2 Communication protocols

2.1 IMU Data Transmission Protocol

Baud rate: 460800, no parity bit, 1 stop bit

Transmission frequency: 400Hz

Send Data Protocol:

Bits	Name	Unit	Value	Conversion	Type
0	Frame header byte 1		0xAA		uchar
1	Frame header byte 2		0xAA		uchar
2	Data Transmission Count		1~200		uchar
3	self-checking byte		255		uchar
4~7	X-axis gyro		32bit low in front and high in back		signed int32
8~11	Y-axis gyro		32bit low in front and high in back		signed int32
12~15	Z-axis gyro		32bit low in front and high in back		signed int32
16~19	X-axis plus table		32bit low in front and high in back		signed int32
20~23	Y-axis plus table		32bit low in front and high in back		signed int32
24~27	Z-axis plus table		32bit low in front and high in back		signed int32
28,29	X-axis gyro temperature		16bit low in front high in back	1/16	signed int16
30	checksum		4~29-byte dissimilarity and		uchar
31	end of frame		0xBB		uchar

 

3 Connecting Definition

The gyroscope electrical interface uses a J30-15ZK connector, and the nodes are defined in Table 4.

F3X100-IMU/INS Output Definition
J30J-15ZK	Definition	Note
5, 13	Power +24V	Inertia Combination Power Supply
6, 7	Power +24V (ground)
1	Serial Port Transmit 3+	Serial Port
2	Serial Port Transmit 3-
3	Serial Port Receive 3+
4	Serial Port Receive 3-
11	Serial Port Transmit 2+	IMU Data Output Serial Port
12	Serial Port Transmit 2-
14	Serial Port Transmit 1+	Debugging Serial Ports
15	Serial Port Transmit 1-
9	Serial Port Receive 1+
10	Serial Port Receive 1-

 

 

Figure 2 F3X100-IMU Dimension

 

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