The heading indicator in the G1000 uses a magnetometor, but how can the attitude indicator work in the G1000?

Does it work with a tilt sensor, rate sensor or accelerometer?


G1000 is a multi-unit system. The attitude information comes from a specialised unit called AHRS (Attitude and Heading Reference System), typically GRS 77. AHRS uses two solid-state gyros (vertical and directional), plus a magnetometer, to obtain a complete attitude information.

In addition, AHRS does employ accelerometers and rate gyros. Their data is used for stabilisation, filtering, and as an input for autopilot and other systems.

  • $\begingroup$ "AHRS uses two solid-state gyros (vertical and directional)" - Does this mean that the AHRS uses gyros to sense the pitch rate and roll rate, but not the yaw rate? $\endgroup$ Dec 11 '18 at 15:14
  • $\begingroup$ A gyro, whether attitude (angle) or rate one, can (technically) measure two out of three angles. So in fact they have an overlap. $\endgroup$
    – Zeus
    Dec 11 '18 at 23:24

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