AIRCRAFT SYSTEM AND METHOD FOR IMPROVING NAVIGATION PERFORMANCE
First Claim
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;
displaying the desired flight path;
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.
1 Assignment
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Accused Products
Abstract
A high integrity navigation system and method are provided. The method comprises performing a cyclic redundancy check (CRC) of a desired flight path of an aircraft, for example an approach to an airport, and comparing the CRC with a stored CRC performed on the identified flight path. If the comparison exceeds a first threshold, a first alert is provided wherein the pilot is to perform a published missed approach. A second alert, also requiring a missed approach, is provided when one or more comparisons are performed of a sensor position of the aircraft with the high integrity flight path; a defined flight path with the high integrity flight path; and the sensor position with an aircraft position determined by a flight management system, and thresholds are exceeded.
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Citations
17 Claims
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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:
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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; displaying the desired flight path; 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. - View Dependent Claims (2, 3, 4, 5, 6)
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7. 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:
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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; 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; performing at least one of the actions selected from the group consisting of; comparing within the processor a sensor position of the aircraft as determined by the processor with a high integrity flight path; determining a defined flight path by the flight management system and comparing the defined flight path with the high integrity flight path; and comparing the sensor position with an aircraft position determined by the flight management system; providing by the processor a second alert signal to the display when at least one of the actions exceeds a threshold; displaying on the display a first alert when the first alert signal is provided; and displaying on the display a second alert when the second alert signal is provided. - View Dependent Claims (8, 9, 10, 11)
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12. An aircraft navigation system comprising:
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a flight management system including a navigation database and configured to; store a plurality of flight paths and a first cyclic redundancy check for each of the flight paths; and identify one of the flight paths; determine a sensor position of the aircraft; a processor coupled to the flight management system, the processor configured to; compute a second cyclic redundancy check for the identified flight path; compare the first cyclic redundancy check with the second cyclic redundancy check; and provide a first alert signal to the display when the comparison of the first cyclic redundancy check with the second cyclic redundancy check exceeds a first threshold; determine a high integrity flight path; compare the sensor position with the high integrity flight path; and provide a second alert signal and the high integrity flight path when the comparison of the sensor position with the high integrity flight path exceeds a second threshold; and a display coupled to the flight management system and configured to; display a first alert in response to the first alert signal; and display a second alert in response to the second alert signal. - View Dependent Claims (13, 14, 15, 16, 17)
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Specification