Volume – 3 Issue – 1 Article – 4

Modeling and Control of a Fixed-Wing High-Speed Mini-UAV

Mesut Bilici1, Mehmet Karalı2
1 Necmettin Erbakan University, Faculty of Aviation and Space Sciences, İstanbul, Turkiye
2 Necmettin Erbakan University, Faculty of Aviation and Space Sciences, İstanbul, Turkiye
F IJAST 2022; 3 (1) DOI: 10.23890/IJAST.vm03is01.0104; Language: EN

High-speed Unmanned Aerial Vehicles (UAVs) will be an interesting subject of
study in today’s aviation technology because of their ingenuity in obtaining high
speeds while maintaining good maneuverability. In this study, modeling and
control of a fixed-wing high-speed mini-UAV are performed. Aerodynamic
analyses of the vehicle with a wingspan of 1.2 meters and a total take-off weight
of 1.1 kg are done with the help of some computational fluid dynamics software.
A developed MATLAB/Simulink code evaluates flight performance after a
doublet control surface disturbance with six-degrees-of-freedom flight
simulations in both longitudinal and lateral directions by a developed
MATLAB/Simulink code. The transfer functions are obtained by trimming the
aircraft at wing-level for a speed of 155 km/h, and the maximum speed that the
mini-UAV could reach is calculated as 400 km/h. Two kinds of different linear
controllers are designed to hold the pitch angle of the vehicle to the desired
value. The time responses of the controllers are represented, and the elevator
deflection effort is evaluated. Finally, a compulsive pitch angle is wanted to be
tracked by the two controllers, and their responses are compared in terms of
performance and stability.

6DOF simulation
PID controller
LQR controller

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