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Aircraft system and method for improving navigation performance

  • US 9,097,529 B2
  • Filed: 07/12/2012
  • Issued: 08/04/2015
  • Est. Priority Date: 07/12/2012
  • Status: Active Grant
First Claim
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1. A method allowing an aircraft to navigate by required navigation performance, the aircraft including a flight management system, a processor, and a display, the method comprising:

  • storing a plurality of flight paths and a first cyclic redundancy check for each of the flight paths in the flight management system;

    identifying one of the flight paths as a desired flight path in the flight management system;

    providing the identified flight path to the display;

    displaying the desired flight path even if the identified flight path is no longer being received by the display;

    computing a second cyclic redundancy check by the processor for the desired flight path;

    comparing by the processor the first cyclic redundancy check of the identified flight path with the second cyclic redundancy check;

    providing a first alert signal by the processor to the display when the comparison of the first cyclic redundancy check of the identified flight path with the second cyclic redundancy check exceeds a first threshold;

    determining a sensor position of the aircraft by an external sensor of the aircraft;

    comparing within the processor the sensor position with the high integrity flight path; and

    providing by the processor a second alert signal and the high integrity flight path to the display when the comparison of the sensor position with the high integrity flight path exceeds a second threshold;

    displaying a first alert when the first alert signal is provided; and

    displaying a second alert when the second alert signal is provided.

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