Fiber-Optic Gyros - Northrop Grumman Electronic Systems ...

IMU PRODUCTS
Figure 4 shows the LN-200 IMU which consists of
three fiber-optic gyroscopes, three micromachined
silicon accelerometers and a microprocessor. It senses
acceleration and rotation about three orthogonal axes
and outputs temperature compensated incremental
angles and incremental velocities.
The IMU is 3.5 inches in diameter and is 3.35
inches high. It weighs approximately 750 grams. It
utilizes an RS-485 digital bus to interface with the
using platform. This product family has been in
production for over 14 years and over 13,000 IMUs
have been sold.
Figure 5 shows typical fiber-optic gyro bias and
scale factor yields from the production line.
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Frequency
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Figure 4. LN-200 IMU
-90 -60 -30 0 30 60
Gyro SF Residuals (ppm)
Figure 5. Typical LN-200 Fiber-Optic Gyro Bias and Scale Factor Yields