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Collision avoidance of UAV is an important function required from pilots and traffic controller as it intends to fly in the airspace of manned aircraft. It is implemented into Smart UAV which the flight test for automatic take-off, conversion and mission flight was conducted successfully last year. Prior to flight test for collision avoidance, the(More)
Shipboard landing of Vertical Take-Off and Landing (VTOL) aircraft is an important consideration to operate aircraft in the ocean. The oceanic operation of aircraft has more difficult environment than the one on the ground due to salty, fogy, and windy condition. Especially the gust and the vortex around the structures on the ship make the approach of(More)
Smart UAV is an unmanned aerial vehicle with a type of tilt rotor developed by KARI since 2002, of which the flight test for automatic flight with 40% small scale vehicle has been completed in 2008 and the flight test of full scale vehicle is conducted in 2011. It adopts ADS-B based on UAT as collision avoidance system. Prior to flight test,(More)
Flight test results of flight control performance of Smart UAV were described. Flight test in airplane mode was performed by internal pilot using automatic functions including auto take-off and landing, speed/altitude/heading hold as well as a point navigation and a preprogram mode. It reached to the designed maximum speed at operational altitude. The rotor(More)
The aircraft autopilot needs the feedback of airflow angles, that is, angle-of attack and sideslip angle to control the aircraft. The airflow angles measured by a mechanical vane are not accurate and very noisy for low airspeed. Moreover, the vane has a mechanical failure risk. This paper describes the extended Kalman filter based method to estimate the(More)
An intelligent tilt-rotor UAV is being developed by the Smart UAV Development Center of Korea Aerospace Research Institute. It is equipped with integrated GPS/INS system and RALT(radar altimeter) for automatic takeoff and landing. GPS/INS integration system gives the altitude referenced to WGS-84 ellipsoid which can be vulnerable to external multipath(More)
Most aircrafts are equipped with an air data system to measure airspeed, angle-of-sideslip(AOS) and so on. An air data system consists of Pitot-static tube and gimbal-mounted weathervane. The static pressure obtained by Pitot-static tube is affected by fuselage nose and angle-of-attack(AOA). To measure AOA and AOS accurately, weathervane should be placed(More)
The shipboard landing of UAV is the important function in the oceanic operation of UAV which meets the severe environment of gust, vortex, and wake around the superstructures on the ship as well as of the movement of ship board in roll, pitch, and heave by wind and sea wave. As the airwake on the shipboard affects the flying quality, the superstructure on(More)
Tilt Rotor UAV of KARI has been developed for ground surveillance, of which performance has been verified through flight test in 2013. Today the use of UAV becomes popular in the field of not only surveillance but also reconnaissance, rescue, science investigation, and home delivery etc. Tilt rotor UAV has a merit of vertical take-off and landing, so that(More)
Flight test results of flying qualities for Helicopter mode of Smart UAV are described. Flight test items in helicopter mode include manual and automatic stick control as well as hold and navigation flight including automatic take off and landing. One of the main purposes of helicopter mode flight test is to evaluate the handling qualities in low speed(More)