Weight discrimination of colliding ballistic objects
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F41H-013/00
G01G-019/03
G01G-019/07
출원번호
UP-0107522
(2008-04-22)
등록번호
US-7798043
(2010-10-11)
발명자
/ 주소
Malakian, Kourken
Salvatore, Stephen J.
출원인 / 주소
Lockheed Martin Corporation
대리인 / 주소
Duane Morris LLP
인용정보
피인용 횟수 :
1인용 특허 :
6
초록▼
When a kinetic kill vehicle is launched against an incoming ballistic object and the two objects collide, by measuring the deflection angle of the trajectory of the merged object and comparing the deflection angle against a threshold value, a determination is made as to the relative weight of the in
When a kinetic kill vehicle is launched against an incoming ballistic object and the two objects collide, by measuring the deflection angle of the trajectory of the merged object and comparing the deflection angle against a threshold value, a determination is made as to the relative weight of the incoming ballistic object and whether or not the incoming ballistic object is a decoy and not the warhead.
대표청구항▼
What is claims is: 1. A method for determining the relative weight of an incoming ballistic object with respect to a predefined weight value, the incoming ballistic object moving in a first ballistic trajectory and the method comprising: launching at least a second object of a known weight toward t
What is claims is: 1. A method for determining the relative weight of an incoming ballistic object with respect to a predefined weight value, the incoming ballistic object moving in a first ballistic trajectory and the method comprising: launching at least a second object of a known weight toward the incoming ballistic object, thereby resulting in the two objects colliding at a strike angle and producing a merged object traveling on a second ballistic trajectory that is deflected from the first ballistic trajectory of the ballistic object by a deflection angle; collecting pre-collision track data, the pre-collision track data comprising velocity vectors of the incoming ballistic object and the second object immediately prior to the ballistic object and the second object colliding; collecting post-collision track data, the post-collision track data comprising observed filtered velocity vector of the merged object after the collision between the incoming ballistic object and the second object; determining the deflection angle of the second ballistic trajectory of the merged object based on the pre-collision and post-collision track data; determining the strike angle based on the pre-collision track data; determining a threshold value for the deflection angle based on the strike angle and said predefined weight value; and determining the relative weight of the incoming ballistic object by comparing the deflection angle with the threshold value. 2. The method of claim 1, further comprising taking an appropriate follow-on action based on the determination of the relative weight of the, incoming ballistic object. 3. The method of claim 1, wherein the known weight of the second object is substantially less than the weight of the incoming ballistic object. 4. The method of claim 3, wherein the step of determining the relative weight of the incoming ballistic object includes comparing the deflection angle with the threshold value and concluding that the incoming ballistic object was heavier than an expected weight class if the deflection angle is less than or equal to the threshold value. 5. The method of claim 3, wherein the step of determining the relative weight of the incoming ballistic object includes comparing the deflection angle with the threshold value and concluding that the incoming ballistic object was lighter than an expected weight class if the deflection angle is greater than or equal to the threshold value. 6. The method of claim 1, wherein determining the deflection angle of the second ballistic trajectory of the merged object based on the pre-collision and post-collision track data comprises calculating the deflection angle by θ = cos - 1 ( V → M · V → B V → M V → B ) where θ is the deflection angle, {right arrow over (V)}B=(VB(1), VB(2), VB(3)) is the velocity vector of the incoming ballistic object B at the collision, {right arrow over (V)}K=(VK(1), VK(2), VK(3)) is the velocity vector of the second object K at the collision, {right arrow over (V)}M=(VM(1), VM(2), VM(3)) is the observed filtered velocity vector of the merged object M after collision given by {right arrow over (V)}M={right arrow over (V)}KWB+{right arrow over (V)}BWK with W B = w K w B + w K , and W K = w B w B + w K , where wB=weight of the incoming ballistic object B and wK=weight of the second object K. 7. A method for determining whether or not an incoming ballistic object moving in a first ballistic trajectory is a warhead that is substantially different than a predefined weight value, the method comprising: launching at least a second object of a known weight toward the incoming ballistic object, thereby resulting in the two objects colliding at a strike angle and producing a merged object traveling on a second ballistic trajectory that is deflected from the first ballistic trajectory of the ballistic object by a deflection angle; collecting pre-collision track data, the pre-collision track data comprising velocity vectors of the incoming ballistic object and the second object immediately prior to the ballistic object and the second object colliding; collecting post-collision track data, the post-collision track data comprising velocity vector of the merged object after the collision between the incoming ballistic object and the second object; determining the deflection angle of the second ballistic trajectory of the merged object based on the pre-collision and post-collision track data; determining the strike angle based on the pre-collision track data; determining a threshold value for the deflection angle based on the strike angle and said predefined weight value; and determining whether or not the incoming ballistic object was a warhead by comparing the deflection angle with the threshold value. 8. The method of claim 7, further comprising taking an appropriate follow-on action based on the determination as to whether or not the incoming ballistic object was a warhead. 9. The method of claim 7, wherein the known weight of the second object is substantially less than the weight of the incoming ballistic object. 10. The method of claim 9, wherein the warhead is heavier than said predefined weight value and the step of determining whether or not the incoming ballistic object was a warhead includes comparing the deflection angle with the threshold value and concluding that the incoming ballistic object was a warhead if the deflection angle is less than or equal to the threshold value. 11. The method of claim 10, wherein taking the appropriate follow-on action comprises launching a third object toward another incoming ballistic object to intercept another warhead. 12. The method of claim 9, wherein the warhead is heavier than said predefined weight value and the step of determining whether or not the incoming ballistic object was a warhead includes comparing the deflection angle with the threshold value and concluding that the incoming ballistic object was not a warhead if the deflection angle is greater than or equal to the threshold value. 13. The method of claim 12, wherein taking the appropriate follow-on action comprises launching a third object toward another incoming ballistic object to intercept a warhead. 14. The method of claim 9, wherein determining the deflection angle of the second ballistic trajectory of the merged object based on the pre-collision and post-collision track data comprises calculating the deflection angle by θ = cos - 1 ( V → M · V → B V → M V → B ) where θ is the deflection angle, {right arrow over (V)}B=(VB(1), VB(2), VB(3)) is the velocity vector of the incoming ballistic object B at the collision, {right arrow over (V)}K=(VK(1), VK(2), VK(3)) is the velocity vector of the second object K at the collision, {right arrow over (V)}M=(VM(1), VM(2), VM(3)) is the observed filtered velocity vector of the merged object M after collision given by {right arrow over (V)}M={right arrow over (V)}KWB+{right arrow over (V)}BWK with W B = w K w B + w K , and W K = w B w B + w K , where wB=weight of the incoming ballistic object B and wK=weight of the second object K.
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이 특허에 인용된 특허 (6)
Lucas Thomas W. (Brea CA), Method for allocating and assigning defensive weapons against attacking weapons.
Nicolas Malakatas CH, Method for engaging at least one aerial target by means of a firing group, firing group of at least two firing units, and utilization of the firing group.
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