Patent ID: 8000867
Filing Date: 2011-08-16
Classification: G05D,G06K,G06T

Abstract:
1. A system for automatically landing an aircraft using image signals, comprising: an altimeter installed on the aircraft, and configured to measure an altitude of the aircraft; a landing mark placed at a landing location on a landing runway; a camera installed on the aircraft, oriented toward a front of the aircraft, and configured to detect a shape of the landing mark in a form of image information; and a FCC(Flight Control Computer) configured to calculate an angle θ between the aircraft and the ground, a ground range GR between the aircraft and the landing location and a slant range SR between the aircraft and the landing location using the altitude information measured by the altimeter, the image information of the landing mark detected by the camera, and angle information composed of pitch, roll and yaw angles of the aircraft, and configured to control automatic landing of the aircraft, wherein: the FCC is further configured to calculate the angle θ between the aircraft and the ground using Equation 1, the FCC is further configured to calculate the ground range GR between the aircraft and the landing location using Equation 2, and the FCC is further configured to calculate the slant range SR between the aircraft and the landing location using Equations 3 or 4: where α: the pitch angle, β: the roll angle, δ: the yaw angle, x: a horizontal length of the landing mark measured from the image information detected by the camera, y: a vertical length of the landing mark measured from the image information detected by the camera, h: the altitude information measured by the altimeter, further wherein the FCC is further configured to calculate a ground range d where ψ: a current angle of entry into the landing runway, and D: an actual diameter of the circle of the landing mark.