SYSTEM AND METHOD FOR LOCATING A TARGET AND GUIDING A VEHICLE TOWARD THE TARGET

• US 20050077424A1
• Filed: 05/30/2003
• Published: 04/14/2005
• Est. Priority Date: 05/30/2003
• Status: Active Grant

• Current Assignee: Raytheon Company (Rtx Corporation)
• Original Assignee: Raytheon Company (Rtx Corporation)
• Inventors: Schneider, Arthur J.
• Granted Patent: US 6,910,657 B2
• Time in Patent Office: Days
• US Class Current: 244/3.110
• CPC Class Codes: F41G 7/303 Sighting or tracking devices especially provided for simultaneous observation of the target and of the missile
• CPC Class Codes: G01S 11/08 using synchronised clocks
• CPC Class Codes: G01S 13/46 Indirect determination of position data
• CPC Class Codes: G01S 13/878 Combination of several spaced transmitters or receivers of known location for determining the position of a transponder or a reflector G01S13/874 takes precedence
• CPC Class Codes: G01S 2013/466 by Trilateration, i.e. two antennas or two sensors determine separately the distance to a target, whereby with the knowledge of the baseline length, i.e. the distance between the antennas or sensors, the position data of the target is determined

Abstract

A vehicle guidance system. The system includes a first mechanism for tracking a vehicle based on time-of-arrival information associated with energy emanating from the vehicle and providing vehicle position information in response thereto. A second mechanism steers the vehicle based on the vehicle position information. In a specific embodiment, the system of further includes a third mechanism for locating the target based on time-of-arrival information associated with energy radiating from the target and providing target location information in response thereto. The second the second mechanism steers the vehicle based on the target location information and the vehicle position information.

Claims

1. A system for locating a target and guiding a vehicle based on a position of said target comprising:

first means for tracking a vehicle based on time-of-arrival information associated with energy transmitted from said vehicle and providing vehicle position information in response thereto;

second means for steering said vehicle based on said vehicle position information; and

third means for employing said first means to locate a target based on time-of-arrival information associated with energy transmitted from said target and providing target location information in response thereto, said second means further including means for steering said vehicle based on said target location information and said vehicle position information.

3. The system of claim 1 wherein said vehicle is an intercepting missile.

4. The system of claim 1 wherein said third means includes three or more receivers equipped to determine said target location information and said vehicle position information based on energy transmitted from said target and said energy transmitted from said vehicle, respectively.

5. The system of claim 4 wherein said three or more receivers include means for performing trilateration based on said energy transmitted from said target and transmitted from said vehicle.

6. The system of claim 5 wherein said target is a ground-based target, and wherein said three or more receivers are positioned on three or more aircraft and/or spacecraft.

7. The system of claim 6 wherein said target is an aerial vehicle.

8. The system of claim 7 wherein said aerial vehicle is an unmanned aerial vehicle.

9. The system of claim 8 wherein said energy transmitted from said target includes television signals.

10. The system of claim 9 further including fourth means for dispatching said vehicle in response to detection of said target by said third means.

11. The system of claim 10 wherein said fourth means includes a portable missile launcher in communication with a controller associated with a master receiver included in said three or more receivers.

12. The system of claim 11 wherein third means includes means for providing time-of-arrival information associated with said energy transmitted from said target and said energy transmitted from said missile from said three or more receivers to said controller on said master receiver.

13. The system of claim 12 wherein said controller includes a mechanism for computing said target location information and said vehicle position information based on said time-of-arrival information.

14. The system of claim 13 wherein said missile includes a radiator and wherein said energy transmitted from said missile is electromagnetic energy having a predetermined waveform.

15. The system of claim 14 wherein said first means includes an algorithm running on said controller for computing said missile position based on time-of-arrival information associated with said energy transmitted from said missile;

detected by said three or more receivers; and

provided to said controller in communication with said master receiver.

16. The system of claim 15 wherein said second means includes a guidance algorithm running on said controller, said guidance algorithm generating steering commands and forwarding said commands to said missile to command a missile steering system included on said missile.

2. (Canceled)

17. A system for locating a target comprising:

first means for receiving television signals from said target and providing timing information in response thereto and

second means for locating said target based on said timing information.

18. The system of claim 17 wherein said target is a moving vehicle.

19. The system of claim 18 wherein said moving vehicle is an unmanned aerial vehicle.

20. The system of claim 19 further including third means for guiding a missile toward said aerial vehicle based on a location of said vehicle determined via said second means and based on positions of said missile as determined via said second means via energy transmitted from said missile.

21. The system of claim 20 wherein said second means includes one or more receivers arranged to perform trilateration on said television signals and said energy transmitted from said missile to determine said location of said aerial vehicle and said positions of said missile.

22-27. -27. (canceled)

28. A method for locating a target and guiding a vehicle based on a position of said target including the steps of:

tracking a vehicle based on time-of-arrival information associated with energy transmitted from said vehicle and providing vehicle position information in response thereto;

steering said vehicle based on said vehicle position information; and

locating a target based on time-of-arrival information associated with energy transmitted from said target and providing target location information in response thereto, further including the step of steering said vehicle based on said target location information and said vehicle position information.