Systems and methods for unmanned aircraft system collision avoidance
First Claim
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1. A method, comprising:
- monitoring separation distances between an intruder aircraft and a self aircraft, the monitoring comprising;
periodically determining a current separation distance between an intruder aircraft and a self aircraft, wherein the current separation distance is a distance between the intruder aircraft and the self aircraft determined at a current time during the monitoring; and
comparing the current separation distance to a Self Separation Threshold (SST), wherein the SST is a predefined distance between the intruder aircraft and the self aircraft,wherein the monitoring determines when the monitored separation distance is less than or equal to the SST;
determining a closest point of approach (CPA) between the intruder aircraft and the self aircraft in response to the current separation distance becoming less than or equal to the SST;
determining whether the current separation distance between the intruder aircraft and the self aircraft is greater than a Collision Avoidance Threshold (CAT)determining whether the CPA to the intruder aircraft is to a left of a flight path of the self aircraft or to a right of the flight path of the self aircraft in response to the current separation distance becoming less than the SST,wherein the self aircraft turns left when performing Self Separation and the CPA to the intruder aircraft is determined to be to the right of the flight path of the self aircraft, andwherein the self aircraft turns right when performing Self Separation and the CPA to the intruder aircraft is determined to be to the left of the flight path of the self aircraft,wherein the self aircraft climbs when performing Collision Avoidance and the CPA to the intruder aircraft is determined to be below the flight path of the self aircraft andwherein the self aircraft descends when performing Collision Avoidance and the CPA to the intruder aircraft is determined to be above the flight path of the self aircraft.
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Abstract
Systems and methods are operable maintain a proscribed Self Separation distance between an unmanned aircraft system (UAS) and an object. In an example system, consecutive intruder aircraft locations relative to corresponding locations of a self aircraft are determined, wherein the determining is based on current velocities of the intruder aircraft and the self aircraft, and wherein the determining is based on current flight paths of the intruder aircraft and the self aircraft. At least one evasive maneuver for the self aircraft is computed using a processing system based on the determined consecutive intruder aircraft locations relative to the corresponding locations of the self aircraft.
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Citations
19 Claims
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1. A method, comprising:
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monitoring separation distances between an intruder aircraft and a self aircraft, the monitoring comprising; periodically determining a current separation distance between an intruder aircraft and a self aircraft, wherein the current separation distance is a distance between the intruder aircraft and the self aircraft determined at a current time during the monitoring; and comparing the current separation distance to a Self Separation Threshold (SST), wherein the SST is a predefined distance between the intruder aircraft and the self aircraft, wherein the monitoring determines when the monitored separation distance is less than or equal to the SST; determining a closest point of approach (CPA) between the intruder aircraft and the self aircraft in response to the current separation distance becoming less than or equal to the SST; determining whether the current separation distance between the intruder aircraft and the self aircraft is greater than a Collision Avoidance Threshold (CAT) determining whether the CPA to the intruder aircraft is to a left of a flight path of the self aircraft or to a right of the flight path of the self aircraft in response to the current separation distance becoming less than the SST, wherein the self aircraft turns left when performing Self Separation and the CPA to the intruder aircraft is determined to be to the right of the flight path of the self aircraft, and wherein the self aircraft turns right when performing Self Separation and the CPA to the intruder aircraft is determined to be to the left of the flight path of the self aircraft, wherein the self aircraft climbs when performing Collision Avoidance and the CPA to the intruder aircraft is determined to be below the flight path of the self aircraft and wherein the self aircraft descends when performing Collision Avoidance and the CPA to the intruder aircraft is determined to be above the flight path of the self aircraft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system, comprising:
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an unmanned aircraft system (UAS) that is configured to fly over terrain without a crew; a surveillance system configured to detect proximity of an intruder aircraft to the UAS; a processing system configured to receive information from the surveillance system, wherein the processor system is configured to; periodically determine a current separation distance between the intruder aircraft and the UAS, wherein the current separation distance is a distance between the intruder aircraft and the UAS at a current time that the current separation distance is determined; compare the current separation distance to a Self Separation threshold (SST), wherein the SST is a predefined distance between the intruder aircraft and the UAS; determine a closest point of approach (CPA) between the intruder aircraft and the UAS in response to the current separation distance becoming less than the SST, wherein the CPA is determined based on the predicted flight path of the UAS and the predicted flight path of the intruder aircraft; and determine whether the CPA to the intruder aircraft is to a left of the current flight path of the self aircraft or to a right of the current flight path of the self aircraft in response to the current separation distance becoming less than the SST, wherein the self aircraft turns left when the CPA to the intruder aircraft is determined to be to the right of the current flight path of the self aircraft, and wherein the self aircraft turns right when the CPA to the intruder aircraft is determined to be to the left of the current flight path of the self aircraft. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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19. A method, comprising:
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determining consecutive intruder aircraft locations relative to corresponding locations of a self aircraft, wherein the determining is based on current velocities of the intruder aircraft and the self aircraft, and wherein the determining is based on current flight paths of the intruder aircraft and the self aircraft; and computing using a processing system at least one evasive maneuver for the self aircraft based on the determined consecutive intruder aircraft locations relative to the corresponding locations of the self aircraft, wherein the at least one evasive maneuver comprises one of a left turn and a right turn; determining separation distances between intruder aircraft locations and the self aircraft based on the determined consecutive intruder aircraft locations relative to the corresponding locations of the self aircraft;
comparing the separation distances to a Self Separation threshold (SST), wherein the SST is a predefined distance; and
determining a closest point of approach (CPA) between the intruder aircraft and the self aircraft only after the current separation distance becomes less than the SST, wherein the self aircraft is performing Self Separation and turns left when the CPA to the intruder aircraft is determined to be to the right of the current flight path of the self aircraft, and wherein the self aircraft is performing Self Separation and turns right when the CPA to the intruder aircraft is determined to be to the left of the current flight path of the self aircraft;
wherein the self aircraft is performing Collision Avoidance and climbs when the CPA to the intruder aircraft is determined to be below the current flight path of the self aircraft, and wherein the self aircraft is performing Collision Avoidance and descends when the CPA to the intruder aircraft is determined to be above the current flight path of the self aircraft.
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Specification