Fiber Optic Gyroscope - FOG 200

Design
The FOG 200 is a small, medium performance fiber-optic gyro (0.1º/hr typical in-run drift stability). Currently Northrop Grumman produces the FOG 200 in single, dual and three axis versions. The FOG 200 is designed for a wide range of applications requiring high reliability and long life.

Features and Benefits
•Medium accuracy, low noise
•Available as remote single, dual and three axis versions
•Available as a single axis assembly
•Drift stability of 0.1º/hour
•High angular rate capability, 1,000 degrees/second
•Solid state, high reliability, long life
•Rugged, high vibration version available (200 g rms)

Applications
The FOG 200’s performance and environmental capability make it suitable for a number of demanding applications including:
•Precision Camera Stabilization
•Gun Turret
•FLIR Stabilization
•Line-of-Sight Tracking
•Radar Stabilization

The gyro channels have wide bandwidth that enable the unit to be used for applications such as gimbal stabilization and motion compensation in very dynamic environments.

Interface
The FOG 200 has a high speed, proprietary digital interface and provides up to three axes of delta angle at wide bandwidth. The FOG 200 requires ±5V.

Size
Each remote FOG sensor is: 1.2 x 2.25x 2.25 in. (3.05 x 5.72 x 5.72 cm)

Electronics
1 - Axis 1.9 x 4.05 x 4.78 in. (4.83 x 10.29 x 12.14 cm)
2 - Axis 1.09 x 4.13 x 5.75 in. (2.77 x 10.49 x 14.60 cm)
3 - Axis 1.27 x 5.0 x 8.0 in. (3.23 x 12.7 x 20.32 cm)

Weight
Each remote FOG sensor 0.17 lb (0.08 kg)
1 - Axis Electronics 1.20 lb (0.54 kg)
2 - Axis Electronics 2.13 lb (0.97 kg)
3 - Axis Electronics 3.30 lb (1.50 kg)

Environment
These FOGs were designed and qualified for flight in a military fighter aircraft. The operating temperature range is -55º C to + 71º C. Since FOGs are solid state instruments and have no moving parts, they generally perform better than other gyro technologies in a vibration environment.

Performance
Northrop Grumman developed the FOG 200 gyro for military applications that demand high accuracy over a wide temperature range. A summary of the gyro’s performance is shown in table 1.

Any gyro’s performance is affected by the operating environment. In a very benign environment, gyro bias stability (short term drift) for this FOG is approximately 0.01 deg/hr. FOG 200 performance over temperature, when modeled by the user is typically 0.25º/hr. In stable temperature conditions drift stability is 0.1º/hr.