Method to determine and guide aircraft approach trajectory
First Claim
1. A method of determining, and guiding an aircraft over, an intermediate trajectory between a first flight trajectory, for low-altitude flight, and a second flight trajectory, which starts at an initial point and from which a tactical landing is carried out, the method comprising:
- receiving, by a processor, information of the aircraft'"'"'s first flight trajectory and the initial point of the second flight trajectory;
determining, with the processor, a point of transition from the first flight trajectory to the intermediate trajectory where the aircraft must depart from the first flight trajectory so as to reach the initial point of the second flight trajectory under predetermined flight conditions; and
automatically guiding, with an automatic guidance system, the aircraft along the intermediate trajectory defined by the endpoints of the point of transition and the initial point of the second flight trajectory, wherein;
to determine the point of transition, the processor;
computationally idealizes a first straight line having a positive slope and a second straight line having a negative slope that are projected into an upstream vertical plane of the aircraft'"'"'s flight from the initial point of the second flight trajectory;
identifies all points at which either the first straight line or the second straight line intersect the first flight trajectory in the upstream vertical plane; and
selects the point of intersection closest to the initial point of the second flight trajectory as the point of transition,the slopes of the first and second straight lines are determined in accordance with the predetermined flight conditions, andthe intermediate trajectory corresponds to a straight line segment connecting the point of transition and the initial point of the second flight trajectory.
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Accused Products
Abstract
A method to determine, and guide an aircraft on, an intermediate trajectory between a first trajectory, for low-altitude flight, and a second trajectory, from which a tactical landing is carried out, may include determining a point of transition which lies on the first trajectory. The point of transition represents the start of the intermediate trajectory and corresponds to the point where the aircraft must exit the first flight trajectory so as to reach an initial point of the second flight trajectory, under predetermined flight conditions. Upon determining the point of transition, the aircraft is guided along the intermediate trajectory interconnecting the point of transition and the initial point of the second trajectory.
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Citations
12 Claims
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1. A method of determining, and guiding an aircraft over, an intermediate trajectory between a first flight trajectory, for low-altitude flight, and a second flight trajectory, which starts at an initial point and from which a tactical landing is carried out, the method comprising:
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receiving, by a processor, information of the aircraft'"'"'s first flight trajectory and the initial point of the second flight trajectory; determining, with the processor, a point of transition from the first flight trajectory to the intermediate trajectory where the aircraft must depart from the first flight trajectory so as to reach the initial point of the second flight trajectory under predetermined flight conditions; and automatically guiding, with an automatic guidance system, the aircraft along the intermediate trajectory defined by the endpoints of the point of transition and the initial point of the second flight trajectory, wherein; to determine the point of transition, the processor; computationally idealizes a first straight line having a positive slope and a second straight line having a negative slope that are projected into an upstream vertical plane of the aircraft'"'"'s flight from the initial point of the second flight trajectory; identifies all points at which either the first straight line or the second straight line intersect the first flight trajectory in the upstream vertical plane; and selects the point of intersection closest to the initial point of the second flight trajectory as the point of transition, the slopes of the first and second straight lines are determined in accordance with the predetermined flight conditions, and the intermediate trajectory corresponds to a straight line segment connecting the point of transition and the initial point of the second flight trajectory. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 10)
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9. A device for determining, and guiding an aircraft over, an intermediate trajectory between a first flight trajectory, for low-altitude flight, and a second flight trajectory, which starts at an initial point and from which a tactical landing is carried out, the device comprising:
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a processor that determines, from information of the aircraft'"'"'s first flight trajectory and the initial point of the second flight trajectory, a point of transition from the first flight trajectory to the intermediate trajectory where the aircraft must depart from the first flight trajectory so as to reach the initial point of the second flight trajectory under predetermined flight conditions; and a section that aids the guidance of the aircraft along the intermediate trajectory defined by the endpoints of the point of transition and the initial point of the second flight trajectory, wherein; to determine the point of transition, the processor; computationally idealizes a first straight line having a positive slope and a second straight line having a negative slope that are projected into an upstream vertical plane of the aircraft'"'"'s flight from the initial point of the second flight trajectory; identifies all points at which either the first straight line or the second straight line intersect the first flight trajectory in the upstream vertical plane; and selects the point of intersection closest to the initial point of the second flight trajectory as the point of transition, the slopes of the first and second straight lines are determined in accordance with the predetermined flight conditions, and the intermediate trajectory corresponds to a straight line segment connecting the point of transition and the initial point of the second flight trajectory. - View Dependent Claims (11, 12)
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Specification