Military Embedded Systems

MEMS-based attitude heading reference System for helicopters released by Northrop Grumman


February 13, 2012

John McHale

Editorial Director

Military Embedded Systems

DALLAS. Engineers at Northrop Grumman Corp. released a MEMS (micro-electromechanical systems)-based (Attitude and Heading Reference System (AHRS), called the LCR-300 at HELI-the EXPO 2012 show this week.

The new device has a MEMS-based Inertial Measurement Unit, designed and developed by navigation system engineers at Northrop Grumman LITEF GmbH in Germany.

The LCR-300 is smaller with a reduced weight. The AHRS also enables directional gyro mode to reduce magnetic compass errors. The unit also has hybrid navigation by making use of global navigation satellite system data. Flight tests of a demonstration LCR-300 on three midsize twin helicopters was completed last year.

The new LCR-300 has of a 4.2-pound AHRS unit, which accepts satellite-based GPS velocity and position data; a magnetometer; a calibration programmable read-only memory unit; and a mounting tray.


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