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Systems and methods of redundancy for aircraft inertial signal data

  • US 8,204,635 B2
  • Filed: 12/16/2008
  • Issued: 06/19/2012
  • Est. Priority Date: 12/16/2008
  • Status: Active Grant
First Claim
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1. An aircraft inertial system, comprising:

  • at least two inertial reference units (IRU) configured to provide a first set of inertial signal data for operating an aircraft;

    at least two attitude heading reference systems (AHRS) configured to provide a second set of the inertial signal data for operating the aircraft;

    at least one primary flight display configured to receive the first and the second sets of the inertial signal data;

    a standby flight display configured to receive at least the second set of the inertial signal data from at least one of the AHRS;

    wherein when a single fault condition occurs in the inertial system, the primary flight display continues to operate with fail-operational redundancy from at least three independent sources of the inertial signal data comprising one or more combinations of the at least two IRU and the at least two AHRS; and

    wherein the standby flight display continues to operate using a different source of the inertial signal data than the source of the inertial signal data for the primary flight display.

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