Method and system for creating an approach to a position on the ground from a location above the ground

• US 6,216,065 B1
• Filed: 08/06/1999
• Issued: 04/10/2001
• Est. Priority Date: 08/06/1999
• Status: Expired due to Term

• Current Assignee: Bell Helicopter Textron Incorporated (Textron Inc)
• Original Assignee: Bell Helicopter Textron Incorporated (Textron Inc)
• Inventors: Hall, Gary W., Bell, Ron, Homan, Michael
• Primary Examiner(s): Camby, Richard M.
• Application Number:
  US09/369,899
• Time in Patent Office: 613 Days
• Field of Search: 701/16, 701/301, 701/14, 701/17, 731/78.T, 342/29, 342/30, 342/31, 342/32, 244/183, 244/184, 244/185, 244/186, 244/187, 244/188, 244/189, 244/3.15, 244/3.18, 244/3.17, 244/175, 340/979, 340/980
• US Class Current: 701/16
• CPC Class Codes: G01C 21/005 with correlation of navigation data from several sources, e.g. map or contour matching G01C21/30 takes precedence
• CPC Class Codes: G01C 23/00 Combined instruments indicating more than one navigational value, e.g. for aircraft; Combined measuring devices for measuring two or more variables of movement, e.g. distance, speed or acceleration
• CPC Class Codes: G01S 13/913 for landing purposes
• CPC Class Codes: G01S 13/935 for terrain-avoidance
• CPC Class Codes: G01S 19/15 Aircraft landing systems
• CPC Class Codes: G01S 7/20 Stereoscopic displays; Three-dimensional displays; Pseudo-three-dimensional displays
• CPC Class Codes: G01S 7/24 the display being orientated or displaced in accordance with movement of object carrying the transmitting and receiving apparatus, e.g. true-motion radar

Abstract

A method and system for creating a precision approach for an aircraft to a position on the ground from a location above the ground is disclosed. The system comprises a display unit onboard the aircraft that displays a digital moving map, a database onboard the aircraft that contains digital terrain elevation data and obstacle data, a global positioning receiver that identifies the in flight position of the aircraft and an input device use to select the position on the ground displayed on the digital moving map. A processor that is also onboard the aircraft is communicably linked to the display unit, the database and the global positioning receiver. The processor generates the digital moving map on the display unit from the digital terrain elevation data and obstacle data and creates an approach derived from global positioning system data for the aircraft to the position on the ground selected on the digital moving map based upon the in flight position of the aircraft.

Claims

1. A system for creating an approach for an aircraft to a position on the ground from a location above the ground comprising:

a display unit onboard the aircraft for displaying a digital moving map;

a database onboard the aircraft, the database containing digital terrain elevation data and obstacle data;

a global positioning receiver for identifying an in flight position of the aircraft;

an input device for selecting the position on the ground displayed on the digital moving map; and

a processor onboard the aircraft communicably linked to the display unit, the database and the global positioning receiver, the processor generating the digital moving map on the display unit from the digital terrain elevation data and obstacle data and creating an approach for the aircraft to the position on the ground.

2. The system as recited in claim 1 wherein the display unit is a touch screen monitor.

3. The system as recited in claim 1 wherein aircraft symbology is positioned on the digital moving map based upon the in flight position of the aircraft.

4. The system as recited in claim 3 wherein the aircraft symbology is displayed on the display unit.

5. The system as recited in claim 1 wherein the approach further comprises an approach for instrument meteorological conditions.

6. The system as recited in claim 1 wherein the approach further comprises an approach for visual meteorological conditions.

7. The system as recited in claim 1 wherein the approach further comprises direction, elevation and distance from the location above the ground to the position on the ground.

8. The system as recited in claim 1 wherein the processor applies an altitude penalty for obstacles.

9. The system as recited in claim 1 further comprising a real-time mapping device for identifying obstacles in the approach, the identified obstacles being compared to the obstacle data in the database by the processor, thereby verifying the validity of the obstacle data in the database and allowing the process to modify the approach if necessary.

10. The system as recited in claim 9 wherein the real-time mapping device further comprises a Doppler radar.

11. The system as recited in claim 1 wherein the real-time mapping device further comprises a diode laser.

12. A method for creating an approach for an aircraft to a position on the ground from a location above the ground comprising the steps of:

generating a digital moving map on a display unit onboard the aircraft from digital terrain elevation data and obstacle data stored in a database onboard the aircraft;

identifying an in flight position of the aircraft with a global positioning receiver;

selecting the position on the ground displayed on the digital moving map; and

creating an approach for the aircraft to the position on the ground.

13. The method as recited in claim 12 further comprising the step of displaying aircraft symbology on the digital moving map based upon the in flight position of the aircraft.

14. The method as recited in claim 13 wherein the step of displaying aircraft symbology on the digital moving map further comprises displaying the aircraft symbology in the middle of the display unit.

15. The method as recited in claim 12 wherein the step of creating an approach for the aircraft to the position on the ground further comprises creating an approach for instrument meteorological conditions.

16. The method as recited in claim 12 wherein the step of creating an approach for the aircraft to the position on the ground further comprises creating an approach for visual meteorological conditions.

17. The method as recited in claim 12 wherein the step of creating an approach for the aircraft to the position on the ground further comprises determining direction, elevation and distance from the location above the ground to the position on the ground.

18. The method as recited in claim 12 further comprising the step of applying an altitude penalty for obstacles.

19. The method as recited in claim 12 further comprising the steps of identifying obstacles in the approach, comparing the identified obstacles to the obstacle data in the database, verifying the validity of the obstacle data in the database and modifying the approach if necessary.

20. The method as recited in claim 19 wherein the step of identifying obstacles in the approach device further comprises operating a Doppler radar.

21. The method as recited in claim 19 wherein the step of identifying obstacles in the approach device further comprises operating a diode laser.

22. A computer program embodied on a computer readable medium for creating an approach for an aircraft to a position on the ground from a location above the ground comprising:

a code segment for generating a digital moving map on a display unit onboard the aircraft from digital terrain elevation data and obstacle data stored in a database onboard the aircraft;

a code segment for identifying an in flight position of the aircraft with a global positioning receiver;

a code segment for selecting the position on the ground displayed on the digital moving map; and

a code segment for creating an approach for the aircraft to the position on the ground selected on the digital moving map from the location above the ground.

23. The computer program as recited in claim 22 further comprising a code segment for displaying aircraft symbology on the digital moving map based upon the in flight position of the aircraft.

24. The computer program as recited in claim 22 further comprising a code segment for creating an approach for instrument meteorological conditions.

25. The computer program as recited in claim 22 further comprising a code segment for creating an approach for visual meteorological conditions.

26. The computer program as recited in claim 22 further comprising a code segment for determining direction, elevation and distance from the location above the ground to the position on the ground.

27. The computer program as recited in claim 22 further comprising a code segment for applying an altitude penalty for obstacles.

28. The computer program as recited in claim 22 further comprising a code segment for comparing obstacles identified with a real-time mapping device with obstacle data in the database, a code segment for verifying the validity of the obstacle data in the database and a code segment for modifying the approach if necessary.