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AEM 5333. UAV Search and Surveillance. Mission Description. Overhead surveillance and tracking Humans on foot Moving vehicles Onboard GPS transceiver Onboard camera = autonomous + manual control capabilities. Flight Conditions. Light weather capable
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AEM 5333 UAV Search and Surveillance
Mission Description • Overhead surveillance and tracking • Humans on foot • Moving vehicles • Onboard GPS transceiver • Onboard camera = autonomous + manual control capabilities
Flight Conditions • Light weather capable • Clear to light precipitation and cloud cover. • Light winds gusts less than 10 mph • Open terrain • Limited by line of sight telemetry • Moderate air temperatures • Service ceiling limited by telemetry
System Analysis: Requirements of mission profile • Task elements • Acquire bearings • Acquire settings • Lock on to target • Compute optimum route between target and tracker using corresponding GPS coordinates • Acquire target using onboard optical sensors • Based on relative velocity of the target compute encircling trajectory within a predefined radius • Mission profile
Automation • Automation in the task elements • Autonomous take off script • Climb to cruise altitude • Once airborne acquire GPS signal and establish communications • Compute optimum route to target • Once UAV and target GPS within predefined distance, descend to observation altitude and switch to optical mode. • Acquire visual signature of target. • Send “target acquired” signal. • Commence hold pattern. • Await for manual control override, else • Compute target velocity via optical tracking • Compute trajectory around target
Mission Profile Cruise 200 ft AGL Cruise 200 ft AGL Climb Descend Observation Alt 50 ft. AGL Land Take off
Payload Analysis • Payload Functions Needed for Search/Surveillance/Tracking Missions • Flight Computer • IMU • GPS • RC Receiver • Telemetry (Live Video Capable Bandwidth) • Optical/IR/Agriculture Camera • Propulsion/Control Systems
Payload Operation • Flight Computer • Capable of flight control and optical/GPS tracking • GPS/IMU • GPS waypoints sent through ground transmitter on target • Telemetry • Communication of live video, state, GPS, camera operation to ground receiver for tracking, camera operation • Optical/IR/Agriculture Camera • Ability to move in 2-DOFs
Mission Profile and Payload • Tracking and Surveillance • GPS Waypoint/Tracking • Optical Tracking • Live Video Transmission • Remote Camera Operation
Airframe Design Reference • Higher aspect ratio • Increased efficiency leads to greater range and endurance • Add dihedral to the wings • Dihedral increases both lateral and roll stability • Creates more stable platform for camera tracking and observation
Airframe Design Reference • Higher powered engine • Increases maximum velocity for tracking faster targets • Allows for shorter take-offs • Retractable Landing Gear • Smaller form and parasitic drag leads to increased range and endurance • Allows for unobstructed view of 360° camera
Airframe Design Reference • Larger capacity battery • Larger energy storage for increased range and endurance • Larger control surfaces • Allows for more control authority with smaller servo inputs