Exo atmospheric intercepting system and method
According to an embodiment of the present invention there is provided a kill-vehicle to be used in an exo-atmospheric anti-missile interceptor aimed at hitting a target, the kill-vehicle having a main body and comprising: an electronic box; a sensor unit coupled to the electronic box and including at least one sensor for tracking the target at a certain field of view; an inertial measurement unit coupled to the sensor unit; and a divert system controlled by the electronic box for providing the kill-vehicle with thrust at a desired direction; said divert system and electronic box constituting said main body, wherein the kill-vehicle further comprises at least one gimbals unit coupled to the main body and to the sensor unit for controllably changing an angle between the sensor unit and the main body, and wherein said electronic box is configured to synchronically operate said divert system and gimbals unit such that the target remains in the field of view of said at least one sensor and the thrust is provided in a direction required for hitting the target.
1. An exo-atmospheric anti-missile kill-vehicle, the kill-vehicle comprising:
a main body of the kill vehicle, the main body including a divert system configured for providing the kill-vehicle with acceleration at a desired direction;
a controller;
a sensor unit configured for tracking a target along a LOS (Line of Sight);
at least one gimbal unit configured for changing a relative angle between the main body of the kill vehicle and the sensor unit; and
an IMU (Inertial Measurement Unit) configured for measuring inertial angular velocity of the LOS, and
wherein the controller is operatively connected to each of the sensor unit, the at least one gimbal unit, the divert system and the IMU, and the controller is configured for synchronizing operation of the divert system and the gimbal unit by dynamically adjusting the relative angle between the main body of the kill vehicle and the sensor unit.
2. The kill-vehicle according to claim 1 , wherein the kill-vehicle is part of an exo-atmospheric anti-missile interceptor.
3. The kill-vehicle according to claim 2 , wherein the controller is configured for synchronously controlling the gimbal unit and the divert system, so that the sensor unit maintains the LOS to the target and so that thrust is provided at any direction required for hitting the target.
4. The kill-vehicle according to claim 3 , wherein the controller is configured for controlling the divert system so that it provides any relative angle within the hemisphere opposite to the line of sight to the target between the direction of thrust and the LOS.
5. The kill-vehicle according to claim 2 , wherein the divert system comprises:
a thruster;
a nozzle coupled to the thruster and configured for providing the kill-vehicle with acceleration, the nozzle having a flexible part; and
at least two linear actuators operable for bending the nozzle with respect to the thruster, the at least two linear actuators are configured for steering the nozzle there-between, thereby providing an acceleration at a desired direction.
6. The kill-vehicle according to claim 5 , wherein the controller is further configured for measuring the LOS rate induced by a maneuver for deriving the acceleration perpendicular to the line of sight required for hitting the target.
7. The kill-vehicle according to claim 6 , wherein the main body further comprises communication means, the communication means are operatively connected to the controller, and wherein the communication means are configured for transmitting target trajectory to the interceptor.
8. The kill-vehicle according to claim 1 , wherein the sensor unit is selected from the group consisting of: an electro-optic sensor; an electro-magnetic sensor; and a combination of an electro-optic and electromagnetic sensor.
9. The kill-vehicle according to claim 1 , wherein the gimbal unit includes at least one rotary motor and an angle-measuring mechanism.
10. A method of operating an exo-atmospheric anti-missile kill-vehicle, the method comprising:
tracking a target along a LOS (Line of Sight) of a sensor unit of the kill vehicle;
utilizing a gimbal unit coupled to the sensor unit and a main body of the kill vehicle for changing a relative angle between the main body and the sensor unit;
measuring inertial angular velocity of the LOS; and
synchronizing an acceleration of the kill-vehicle at a desired direction and the changing of the relative angle between the main body of the kill vehicle and the sensor unit.
11. The method according to claim 10 , further comprising calculating the acceleration of the kill-vehicle according to a guidance law to determine a direction required for hitting the target and a respective required thrust along the main body at the relative angle.
12. The method according to claim 11 , further comprising measuring the LOS rate induced by a maneuver for deriving the acceleration perpendicular to the line of sight required for hitting the target.
13. The method according to claim 10 , wherein utilizing a gimbal comprises providing any relative angle within the hemisphere opposite to the line of sight to the target between the direction of thrust and the LOS.