Fiber optic gyro IMU systems

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Fiber optic gyro IMU systems

FOGPhotonics's TRF is a small lightweight and low cost strap down Inertial Measurement Unit(IMU) family, based on Fiber Optic Gyro technology.

The TRF-500s is a high performance IMU with an excellent cost/performance ratio.The TRF-500s has digital outputs of linear accelleration and angular rates, short data latency for flight control applications and extended BIT.The TRF-500s is a tactical grade FOG based on closed loop gyros suitable for military high-end applications.TRF-500s is a robust, reliable product with state-of-the-art gyros and accelerometers.

Product Features

● Designed for easy integration

● High bandwidth and low noise

● Small, compact design

● Excellent shock performance

● Flexible interfaces and programmable message outputs and data rates

● RS-422 Asynchronous

Technical Specification

IMU Specifications
Parameter	Units	TRF-500s
Input rate(Max)	°/sec	500
Initialization Time (valid data)	S	≤0.007(10s,1σ)
Bias Repeatability (day to day)	°/hr(1σ)	0.1
Scale factor repeatability	ppm(1σ)	≤10
Scale Factor Non-Linearity (max rate, 25°C)	ppm,(1σ)	≤10
Band width	HZ	>100
Dimension	mm	280x124X186
Weight	g	＜7000
Operation temperature	℃	-45-+71
Storage temperature	℃	-55-+85
Shock	g	20 g, 11 msec, sawtooth
Vibrations	g2/HZ	0.04
Interface		RS422 Or RS422;ARINC-429
Power supply	V	±28VDC
MTBF	Hours	36000
Baud Rate	Kbps	Typ 11528kbps (User selectable 9.6 Kbps to 921.6 Kbps)
Data Rate	Hz	Typ400Hz(User Selectable 1 to 1000 Hz)

Accelerometer Specifications
Accelerometer Technology	Quartz
Input Limit (max)	±10 g
Bias Instability (constant temp)	<0.05 mg, 1σ
Scale Factor Temperature Sensitivity	250 ppm/°C, 1σ (max), ≤100 ppm/°C, 1σ (typical)
Bandwidth (-3 dB)	≥200 Hz
Velocity Random Walk (25°C)	≤0.12mg/√Hz(0.23 ft/sec/√hr)

Navigation Accuracy
Position( CEP)	Pure inertia: 2.0nmile/20min Combination:20m
Velocity Accuracy(RMS)	Pure inertia: 2m/s Combination:0.5m/s
Heading Accuracy(1σ)	Pure inertia: 0.5° Combination:0.3°
Attitude Accuracy(1σ)	Pure inertia: 0.1° Combination:0.1°

Applications

● Guided weapons

● Smart Munitions

● Unmanned Air Wehicles

● Fiber sensor

● Optron system stabilization

● Radar antenna stabilization