Inertial Sensors, IMU and AHRS

Aerospace and Defense Systems

Inertial Sensors are comprised of accelerometers and gyros. Accelerometers measure change of velocity and gyros measure angle of change. 

MEMS Sensors are compact chip-scale devices comprised of micro-patterned silicon structures fabricated using semiconductor processes.  

Attitude Heading Reference Systems (AHRS) consist of sensors that provide heading, attitude and yaw information for aircraft.

Inertial Measurement Units (IMU) are electronic devices that measure and report a vehicle's velocity, orientation, and gravitational forces and are used to maneuver aircraft.

Founded in 1995, Moog Crossbow is a leading supplier of advanced inertial sensor technology to aerospace and defense programs around the world. By leveraging the latest advances in MEMS and fiber optic sensor technology, our inertial solutions provide outstanding performance and value. 

Moog Crossbow’s product lines include GPS-aided inertial measurement units (IMU), attitude and heading reference systems (AHRS), vertical gyroscopes, and inclinometer/tilt sensors. The products are fielded on mission critical manned and unmanned airborne, marine and ground platforms such as the Hunter RQ-5A Unmanned Aerial Vehicle, Improved Target Acquisition System (ITAS) and Long Range Advanced Scout Surveillance System (LRAS).

GPS / IMU Systems

Moog Crossbow’s NAV440 and GNAV540 products are fully integrated inertial solutions that combine the latest MEMS sensors technology, SAASM or C/A GPS receivers, and a 3-axis magnetometer in a robust sealed enclosure. The systems output continuous position, heading and orientation information to provide a GPS-aided attitude and heading reference system (AHRS) and GPS navigation solution. Typical applications include land vehicle guidance, avionics systems, platform stabilization and unmanned vehicle control.

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Current man-portable targeting systems rely on a digital magnetic compass (DMC) to determine azimuth.  Unfortunately, DMC are highly susceptible to interference from nearby magnetic interference, which causes significant target location errors. Moog Crossbow is developing a compact MEMS-based Northfinder that determines azimuth non-magnetically and at high accuracy, while retaining the man-portable characteristics of the digital magnetic compass.

Vertical Gyro Systems

Moog Crossbow Vertical Gyros VG700 and NAV440 series products provide critical roll, pitch and heading information in highly dynamic airborne, ground and marine environments. The systems are based on fiber optic or MEMS gyro technology to provide superior performance, reliability and long term stability. Typical applications include avionics, platform stabilization, land vehicle guidance, and control of robotic systems.

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