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Maintenance-free Gyro from Raytheon

German navigation system manufacturer Raytheon Anschütz has launched a new generation gyro compass which it says can be operated free of maintenance.

Horizon MF is Raytheon Anschütz’s new strap down compass system which uses Hemispherical Resonator Gyros (HRG) to measure angular rates for heading calculation.

In a strapped-down system angular rate gyros and accelerometers are not gimballed, but mounted stationary in a housing. The sensor measures angular rates and accelerations in three axes.

Based on these measurements software algorithms are used to compute heading, as well as roll and pitch.

Horizon MF comes as a maintenance-free (MF) sensor with a Mean Time Between Failures (MTBF) of more than 100,000 hours, which Raytheon says is many times the MTBF values of optical or classical mechanical gyros.

As part of a gyro compass system Horizon MF provides regular functions like heading selection, heading monitoring, automatic switch-over, an independent transmitting magnetic compass and individual speed error correction, and integrates with the Anschütz Standard 22 gyro compass.


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