CPC G01C 21/20 (2013.01) [G06N 3/08 (2013.01); G06N 7/01 (2023.01); G06V 10/48 (2022.01); G06V 20/13 (2022.01); G08G 5/0021 (2013.01); G08G 5/0039 (2013.01); G08G 5/0047 (2013.01); G08G 5/0086 (2013.01)] | 28 Claims |
1. An aircraft navigation system that comprises:
a sensor system associated with an aircraft, wherein the sensor system is configured to generate images about an environment around the aircraft;
a landmark detector in a flight control system of the aircraft configured to:
receive the images from the sensor system;
identify, based upon the images, landmarks in the environment around the aircraft; and
determine bearings from the aircraft to the landmarks;
a position calculator configured to:
determine, respectively for each landmark in each image in the images and based upon a pixel location of each landmark in each image, a section that comprises a location of the landmark, the section defined by:
a bearing from the aircraft to the landmark and an error distribution of the bearing from the aircraft to the landmark; and
a distance from the aircraft to the landmark and an error distribution of the bearing from the aircraft to the landmark;
invert, respectively for each landmark in each image in the images, the section and derive therefrom:
a bearing from the landmark to the aircraft and an error distribution of the bearing from the landmark to the aircraft; and
a distance from the landmark to the aircraft and an error distribution of the bearing from the landmark to the aircraft; and therefrom
a calculated position of the aircraft;
a position estimator configured to, based upon aircraft state information and the calculated position of the aircraft, form an estimate of a current position of the aircraft; and
a guidance system configured to provide, based upon the estimate of the current position of the aircraft, a guidance that directs the aircraft to a target location.
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