PREDICTING AIRCRAFT TRAJECTORY

• US 20100305781A1
• Filed: 09/10/2008
• Published: 12/02/2010
• Est. Priority Date: 09/21/2007
• Status: Active Grant

• Current Assignee: The Boeing Co.
• Original Assignee: The Boeing Co.
• Inventors: Félix, Francisco A. Navarro
• Granted Patent: US 9,020,662 B2
• Time in Patent Office: Days
• US Class Current: 701/3
• CPC Class Codes: B64D 43/00 Arrangements or adaptations of instruments arrangements of cameras B64D47/08; aeronautical measuring instruments per se G01C
• CPC Class Codes: G01C 23/005 Flight directors indicating arrangements specially adapted for rotary gyroscopes G01C19/32
• CPC Class Codes: G08G 5/0021 located in the aircraft
• CPC Class Codes: G08G 5/0052 for cruising combined instruments indicating more than one navigational value G01C23/00
• CPC Class Codes: G08G 5/0065 for taking-off
• CPC Class Codes: G08G 5/025 Navigation or guidance aids radar or analogous systems specially adapted for landing purposes G01S13/913
• CPC Class Codes: G08G 5/045 Navigation or guidance aids, e.g. determination of anti-collision manoeuvers radar or analogous systems specially adapted for anti-collision between aircraft G01S13/933

Abstract

The present invention provides a computer-implemented method of producing a description of aircraft intent expressed using a formal language. The description may be used to predict aircraft trajectory, for example by air traffic management. Rules are used in association with information provided to generate a set of instructions describing both the aerodynamic configuration of the aircraft and the motion of the aircraft. These instructions are checked to ensure that they describe unambiguously the aircraft'"'"'s trajectory. The instructions are then expressed using a formal language.

Claims

1. A computer-implemented method of providing a description of aircraft intent expressed using a formal language, the method comprising:

receiving information defining how the aircraft is to be flown during a time interval, and storing the information in an information database;

deriving a set of instructions from the information stored, wherein the set of instructions comprise configuration instructions that describe the aerodynamic configuration of the aircraft and motion instructions that describe the motion of the aircraft;

ensuring that the set of instructions comply with a set of rules stored in a rules database thereby confirming that the configuration instructions define the aerodynamic configuration of the aircraft as required and that the motion instructions close the degrees of freedom of equations of motion used to describe the aircraft motion during the time interval; and

expressing the set of instructions using a formal language.

2. The method of claim 1, wherein deriving the set of instructions comprises identifying from the information stored information relating to how the aircraft is to be configured and providing configuration instructions based on that configuration-related information.

3. The method of claim 2, comprising identifying information relating to high-lift devices, landing gear or speed brakes, and providing a high-lift related, landing gear related or speed brakes related instruction, respectively.

4. The method of claim 3, wherein ensuring that the set of instructions comply with a set of rules stored in a rules database thereby confirming that the configuration instructions define the aerodynamic configuration of the aircraft as required comprises ensuring that the set of instructions includes one and only one of each of a high-lift related instruction, a landing gear related instruction and a speed brakes related instruction.

5. The method of claim 1, wherein deriving the set of instructions comprises identifying from the information stored information determining the motion of the aircraft and providing motion instructions based on that motion-related information.

6. The method of claim 5, comprising identifying information relating to lateral motion, vertical motion and speed, and providing motion instructions that determine the lateral motion, vertical motion and speed.

7. The method of claim 6, wherein ensuring that the set of instructions comply with a set of rules stored in a rules database thereby confirming that the motion instructions close the degrees of freedom of equations of motion used to describe the aircraft motion comprises ensuring that there are three motion instructions, each motion instruction closing one degree of freedom.

8. The method of claim 1, wherein ensuring that the set of instructions comply with a set of rules stored in a rules database thereby confirming that the motion instructions close the degrees of freedom of equations of motion used to describe the aircraft motion comprises ensuring that the instructions do not provide conflicting requirements.

9. The method of claim 1, wherein instructions are placed into groups, such that instructions are first distributed according to their effect and then incompatible instructions are grouped together.

10. The method of claim 9, comprising deriving the set of instructions such that the set only contains one instruction from each group.

11. The method of claim 1, wherein receiving information comprises receiving information relating to aircraft operator preferences, how a pilot intends to fly the aircraft, or departure/arrival procedures to be followed during a flight.

12. The method of claim 1, wherein expressing the set of instructions using a formal language comprises providing the information necessary, or references to where the information may be found, to solve equations of motion describing aircraft flight and so compute a trajectory of the aircraft.

13. The method of claim 12, wherein providing references to where the information may be found comprises providing references to a database storing information relating to the aircraft performance or atmospheric conditions.

14. The method of claim 1, comprising providing a graphical display of the set of instructions expressed using a formal language.

15. A computer-implemented method of predicting the trajectory of an aircraft comprising:

reading data providing a description of aircraft intent expressed using a formal language, the data provided by a method comprising;

receiving information defining how the aircraft is to be flown during a time interval, and storing the information in an information database;

deriving a set of instructions from the information stored, wherein the set of instructions comprise configuration instructions that describe the aerodynamic configuration of the aircraft and motion instructions that describe the motion of the aircraft;

ensuring that the set of instructions comply with a set of rules stored in a rules database thereby confirming that the configuration instructions define the aerodynamic configuration of the aircraft as required and that the motion instructions close the degrees of freedom of equations of motion used to describe the aircraft motion during the time interval; and

expressing the set of instructions using a formal language;

solving equations of motion defining aircraft motion using said data and with reference to an aircraft performance model and an Earth model; and

providing a description of the predicted trajectory.

16. The method of claim 15, comprising providing a graphical display of the predicted trajectory.

17. A computer-implemented method of air traffic management, comprising:

predicting the trajectories of at least two aircraft, comprising for each prediction;

reading data providing a description of aircraft intent expressed using a formal language, the data provided by a method comprising;

receiving information defining how the aircraft is to be flown during a time interval, and storing the information in an information database;

deriving a set of instructions from the information stored, wherein the set of instructions comprise configuration instructions that describe the aerodynamic configuration of the aircraft and motion instructions that describe the motion of the aircraft;

ensuring that the set of instructions comply with a set of rules stored in a rules database thereby confirming that the configuration instructions define the aerodynamic configuration of the aircraft as required and that the motion instructions close the degrees of freedom of equations of motion used to describe the aircraft motion during the time interval; and

expressing the set of instructions using a formal language;

solving equations of motion defining aircraft motion using said data and with reference to an aircraft performance model and an Earth model; and

providing a description of the predicted trajectory, and comparing the at least two predicted trajectories to identify potential conflicts.

18. The method of claim 17, further comprising resolving conflicts by advising aircraft of necessary changes to their aircraft intent.

19. A method of avoiding aircraft collisions, comprising:

an aircraft predicting its trajectory, comprising;

reading data providing a description of aircraft intent expressed using a formal language, the data provided by a method comprising;

receiving information defining how the aircraft is to be flown during a time interval, and storing the information in an information database;

deriving a set of instructions from the information stored, wherein the set of instructions comprise configuration instructions that describe the aerodynamic configuration of the aircraft and motion instructions that describe the motion of the aircraft;

ensuring that the set of instructions comply with a set of rules stored in a rules database thereby confirming that the configuration instructions define the aerodynamic configuration of the aircraft as required and that the motion instructions close the degrees of freedom of equations of motion used to describe the aircraft motion during the time interval; and

expressing the set of instructions using a formal language;

solving equations of motion defining aircraft motion using said data and with reference to an aircraft performance model and an Earth model; and

providing a description of the predicted trajectory;

receiving a set of instructions expressed in a formal language that relate to the aircraft intent of another aircraft;

predicting the trajectory of the other aircraft; and

comparing the two predicted trajectories to identify any conflicts in the trajectories.

20. The method of claim 19, comprising providing a graphical display of the predicted trajectories.