FSU307 Fiber Optic Inertial Measurement Unit

 

 

 

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

 

 

Company's FSU307 fiber optic inertial measurement unit is a high-reliability, cost-effective navigation system for aircraft, UGVs, USVs, UAVs, and similar platforms. Inheriting a modular design philosophy, it integrates high-precision silicon photonic gyroscopes and MEMS accelerometers. Beyond IMU applications, its software is configurable for transfer alignment, integrated navigation, pure INS, and AHRS modes, adapting to diverse inertial navigation requirements to meet varied user needs.

 

 

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	Specifications
Fiber OpticGyro
Range (°/s)	±500
Bias (°/h)	1
Bias Stability (°/h, 10s avg.)	0.5
Bias Instability (°/h, Allan)	0.05
Bias Repeatability (°/h, 6 cycles)	0.5
ARW (°/√h)	0.025
Scale Nonlinearity (ppm)	100
Cross-Coupling (rad)	≤0.001
Bandwidth (Hz)	≥200
MEMSAccelerometer
Range (g)	±30
FT Bias (mg, 3σ)	≤0.5
Bias Stability (μg, 10s avg.)	≤10
Bias Instability (μg, Allan, typ.)	≤3
Bias Repeatability (μg)	≤10
Velocity Random Walk (m/s/√h)	≤0.01
Scale Nonlinearity (ppm, ±1g)	≤100
Cross-Coupling (rad)	≤0.001
Bandwidth (Hz)	≥200
Electrical/Mechanical Interface
Input Voltage (V DC)	5
Power Consumption (W)	≤10
Dimensions (mm)	88.9×89.55
Unit Weight (kg)	≤0.5
Operating Environment
Operating Temperature (°C)	-40 ~ +70
Storage Temperature (°C)	-55 ~ +85
Vibration (g)	6 @ 20~2000 Hz
Shock (g)	100 , 11 ms
Reliability/Suitability
MTBF/MTTR (h)	10000 / 0.5
Maintenance	BIT 95%

 

 

 

 

Product Overview

FSU307 fiber optic IMU is a high-reliability, cost-effective navigation system widely used in navigation, control, and measurement for aircraft, UGVs, USVs, and UAVs.

The IMU inherits a modular design philosophy, employing high-precision silicon photonic gyroscopes and high-precision MEMS accelerometers. Beyond standalone IMU operation, it supports configurable software modes including transfer alignment, integrated navigation, pure INS computation, and AHRS to maximize compatibility with diverse applications.

 

Product Composition

FSU307 fiber optic IMU consists of a three-axis silicon photonic gyroscope, high-precision MEMS accelerometer, signal processing circuit, navigation software, mechanical components, and test cable. Key components:

Table 1 IMU Main Components

No.	CompositionComponent	Qty	Model	Remarks
1	High-Precision INS	1	FSU307
2	Connector Plug	1	J20JD-21TJL	Male

 

Key Features

• Key features of FSU307 fiber optic IMU:
• Domestic core components, high performance, modular, lightweight
• Rich interfaces
• 10 W steady-state power
• Full-temp calibration, -40°C to +70°C
• Mechanical environment resistant
• Vibration, shock, and EMI resistant
• Online firmware upgrade and installation error compensation

 

Applications

• Primary applications of FSU307 fiber optic IMU:
• Mobile position and attitude reference
• UGVs, USVs/UUVs
• Surveying
• Stabilized platforms
• Underwater vehicles
• SATCOM on the move
• Intelligent driving
• Munition guidance
• Intelligent mining north-finding

 

 

System Specifications

Table 2 FSU307 Fiber Optic IMU Performance Specifications

Fiber Optic Gyroscope
Range (°/s)	±500
Bias (°/h)	1
Bias Stability (°/h, 10s avg.)	0.5
Bias Instability (°/h, Allan)	0.05
Bias Repeatability (°/h, 6 cycles)	0.5
ARW (°/√h)	0.025
Scale Nonlinearity (ppm)	100
Cross-Coupling (rad)	≤0.001
Bandwidth (Hz)	≥200
MEMS Accelerometer
Range (g)	±30
FT Bias (mg,3σ)	≤0.5
Bias Stability (μg,10savg.)	≤10
Bias Instability (μg,allan,typ)	≤3
Bias Repeatability (ug)	≤10
VRW (m/s/√h)	≤0.01
Scale Nonlinearity (ppm,±1g)	≤100
Cross-Coupling (rad)	≤0.001
Bandwidth (Hz)	≥200Hz
Electrical/Mechanical Interface
Input Voltage (V DC)	5
Power Consumption (W)	≤10
Dimensions (mm)	88.9×89.55
Unit Weight (kg)	≤0.5
Operating Environment
Operating Temperature (°C)	-40~ +70
Storage Temperature (°C)	-55~ +85
Vibration ( g)	6 @ 20~2000 Hz
Shock (g)	100 , 11 ms
Reliability/Suitability
MTBF/MTTR (h)	10000 / 0.5
Maintenance	BIT 95%

 

Mechanical Interface

Mechanical interface of FSU307 fiber optic IMU is shown below:

Fig. 1 FSU307 Fiber Optic Inertial Measurement UnitMechanical InterfaceFig.

 

Electrical Interface

FSU307 IMU uses a J30JM-21ZKP connector, mating with J30J-21TJL plug. The connector pinout is defined as follows:

Table 3 FSU307 Fiber Optic IMU Connector Pinout

Pin	PinDefinition	DB9 Definition	Interface	FunctionDescription
1	Vin+	Red AlligatorVin+	Input Range+5V	System Power Input
12
2	GND	Black Alligator GND	GND	System Power Ground
13
4	Reserved	/	/
15	Reserved	/
16	RS422_RX+	DB9-M1-1	M1:Isolated RS422	Data output, system configUpgrade
5	RS422_RX-	DB9-M1-2
6	RS422_TX+	DB9-M1-3
17	RS422_TX-	DB9-M1-4
14	GGND	DB9-M1-5
7	Reserved
19	Reserved
18	Reserved
21	RS232_TXD2	DB9-M3-2	M3: Isolated RS232	NavigationData output
9	RS232_RXD2	DB9-M3-3
10	GGND	DB9-M3-5
8	PPS_IN	Pigtail		TTL Level
11	GGND	Pigtail	GND	Isolated Ground
20	TOV_OUT	Pigtail
3	GGND	Pigtail	GND	Isolated Ground

 

 

The general IMU protocol outputs data in timed broadcast mode at 200 Hz, 40 bytes per frame, 460800 bps, 1 start bit, 8 data bits, 1 stop bit, no parity, LSB first. Baud rate and output rate are configurable.

Table 4 FSU307 Fiber Optic IMU Protocol

No.	Offset	Byte Count	Content	Scale	Range	Unit	Remarks
1	0	1	0x55	1			Header
2	1	1	0xAA	1			Header
3	2	1	36	1			Data Length
4	3	4	PCnum	1			1 ms Counter
5	7	4	Angular Rate X	0.000001	[-1000,1000]	°/s
6	11	4	Angular Rate Y	0.000001	[-1000,1000]	°/s
7	15	4	Angular Rate Z	0.000001	[-1000,1000]	°/s
8	19	4	Accel X	0.000001	[-40g,40g]	m/s2
9	23	4	Accel Y	0.000001	[-40g,40g]	m/s2
10	27	4	Accel Z	0.000001	[-40g,40g]	m/s2
11	31	2	Temperature	0.008	[-120,120]	℃
12	33	2	Reserved
13	35	4	Reserved
14	39	1	Checksum	1	[0, 255]		Lower 8 bits of bytes 2-38 sum

 

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