Method of generating and displaying a flare drift vector symbol

• US 9,569,973 B2
• Filed: 09/26/2014
• Issued: 02/14/2017
• Est. Priority Date: 09/26/2014
• Status: Active Grant

• Current Assignee: The Boeing Co.
• Original Assignee: The Boeing Co.
• Inventors: Eaton, Douglas J. Jr., Dubeck, Scott T.
• Primary Examiner(s): Nguyen, John Q
• Assistant Examiner(s): KERRIGAN, MICHAEL V
• Application Number:
  US14/497,621
• Publication Number:
  US 20160117930A1
• Time in Patent Office: 872 Days
• US Class Current: 1/1
• CPC Class Codes: F41H 11/02 Anti-aircraft or anti-guided missile or anti-torpedo defence installations or systems cartridges or missiles for producing smoke or for dispensing radar chaff or infrared material F42B5/15, F42B12/48, F42B12/70; informative reference: details of radar or sonar systems G01S7/00; jamming or electronic countermeasures G01S7/38, G01S7/495, H04K3/00
• CPC Class Codes: F42B 4/28 Parachute flares F42B4/12 takes precedence
• CPC Class Codes: G01C 21/20 Instruments for performing navigational calculations G01C21/24, G01C21/26 take 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: G08G 5/0021 located in the aircraft
• CPC Class Codes: G08G 5/0039 Modification of a flight plan

Abstract

The present disclosure is generally directed to a method of generating and displaying a parachute flare drift vector symbol on a navigation display of the aircraft capable of deploying a flare relative to a real-time navigation map. The flare drift vector symbol includes a flare ignition forward/aft distance relative to the aircraft deploying the flare, a flare ignition left/right distance relative to the aircraft deploying the flare, a flare burn vector distance, and a flare burn vector direction. The flare drift vector symbol is generating based on the flare parameters, the wind parameters, the flare drift distance, the flare drift direction and the aircraft parameters.

Claims

1. A method of generating and displaying a release point for a flare capable of being deployed by an aircraft, the method comprises:

inputting into a computing device a planned midpoint of a planned burn track of the ignited flare corresponding to a geographic coordinate;

inputting into the computing device flare parameters for the flare capable of being deployed by the aircraft;

inputting into the computing device wind parameters including a wind direction and a wind magnitude for a given flare ignition altitude;

inputting into the computing device a flare drift distance and a flare drift direction for the given flare ignition altitude;

inputting into the computing device aircraft parameters including an aircraft speed and an aircraft direction;

generating by the computing device a flare drift vector based on the flare parameters, the wind parameters, the flare drift distance, the flare drift direction and the aircraft parameters;

calculating by the computing device a midpoint of the flare drift vector;

determining by the computing device a release point of the flare such that the planned midpoint of the planned burn track of the ignited flare coincides with the midpoint of the flare drift vector; and

displaying the release point on a navigation display of the aircraft capable of deploying the flare relative to a real-time navigation map.

2. The method according to claim 1, wherein inputting the flare parameters includes inputting into the computing device a flare ignition altitude and a flare total burn time.

3. The method according to claim 1, wherein inputting the wind parameters further comprises:

inputting into the computing device at least one altitude for a corresponding pair of wind direction and wind magnitude values.

4. The method according to claim 1, further comprising:

calculating, by the computing device, the flare drift distance and the flare drift direction based on the input flare parameters and the input wind parameters.

5. The method according to claim 1, wherein the aircraft parameters further include at least one of an aircraft altitude, an aircraft direction, an aircraft ambient temperature.

6. The method according to claim 1, wherein the flare drift vector includes

a flare ignition forward/aft distance relative to the release point of the flare,

a flare ignition left/right distance relative to the release point of the flare.

7. The method according to claim 6, wherein determining by the computing device the release point of the flare is based upon

the flare ignition forward/aft distance relative to the planned midpoint of the planned burn track, and

the flare ignition left/right distance relative to the planned midpoint of the planned burn track.

8. The method according to claim 1, further comprising:

displaying the flare drift vector as a symbol on the navigation display of the aircraft capable of deploying the flare relative to the real-time navigation map.

9. The method according to claim 8, wherein the flare drift vector symbol further includes

a flare ignition forward/aft distance relative to the aircraft deploying the flare,

a flare ignition left/right distance relative to the aircraft deploying the flare,

a flare burn vector distance,

a flare burn vector direction, and

a graphical mark at a center of the flare drift vector symbol identifying a midpoint of a burn track of the ignited flare relative to the current position of the aircraft.

10. The method according to claim 8, wherein the flare drift vector symbol further includes

a flare ignition forward/aft distance relative to the planned midpoint of a planned burn track,

a flare ignition left/right distance relative to the planned midpoint of a planned burn track,

a flare burn vector distance,

a flare burn vector direction, and

a graphical mark at a center of the flare drift vector symbol identifying the planned midpoint of the planned burn track of the ignited flare.

11. The method according to claim 8, wherein displaying the flare drift vector symbol on the navigation display of the aircraft further comprises displaying the flare drift vector symbol relative to a current position of the aircraft.

12. The method according to claim 8, wherein displaying the flare drift vector symbol on the navigation display of the aircraft further comprises displaying the flare drift vector symbol relative to the planned midpoint of the planned burn track of the ignited flare.

13. A method of recalculating and displaying a release point and an associated flight path for a flare capable of being deployed by an aircraft, the method comprising:

providing a first planned flight path including a first planned release point thereon for the flare capable of being deployed by the aircraft, the first planned flight path being determined based on first wind parameters including a first wind speed and a first wind direction, and a planned midpoint of a planned burn track of the ignited flare where the planned midpoint is located at a selected geographical location;

inputting into a computing device second wind parameters including a second wind direction and a second wind magnitude for a given flare ignition altitude;

inputting into the computing device a flare drift distance and a flare drift direction for the given flare ignition altitude;

inputting into the computing device aircraft parameters including an aircraft speed and an aircraft direction;

generating by the computing device a flare drift vector based on flare parameters, the second wind parameters, the flare drift distance, the flare drift direction and the aircraft parameters;

calculating by the computing device a midpoint of the flare drift vector;

determining by the computing device a second release point of the flare such that the planned midpoint of the planned burn track of the ignited flare coincides with the midpoint of the flare drift vector;

generating by the computing device a second flight path including the second release point of the flare thereon; and

displaying the second release point and the second flight path on a navigation display of the aircraft capable of deploying the flare relative to a real-time navigation map.

14. The method according to claim 13, wherein the flare drift vector includes a flare ignition forward/aft distance relative to the planned midpoint of the planned burn track, a flare ignition left/right distance relative to the planned midpoint of the planned burn track, and

wherein determining by the computing device the second release point of the flare is based upon the flare ignition forward/aft distance relative to the planned midpoint of the planned burn track, and the flare ignition left/right distance relative to the planned midpoint of the planned burn track.

15. The method according to claim 13, further comprising:

displaying the flare drift vector as a symbol on the navigation display of the aircraft capable of deploying the flare relative to the real-time navigation map.

16. The method according to claim 15, wherein displaying the flare drift vector symbol on the navigation display of the aircraft further comprises displaying the flare drift vector symbol relative to a current position of the aircraft.

17. The method according to claim 15, wherein displaying the flare drift vector symbol on the navigation display of the aircraft further comprises displaying the flare drift vector symbol relative to the planned midpoint of the planned burn track of the ignited flare.