Publisher : The Korean Society for Aeronautical & Space Sciences
DOI : 10.5139/IJASS.2010.11.3.167
Title & Authors
Dynamic Modeling and Stabilization Techniques for Tri-Rotor Unmanned Aerial Vehicles Yoo, Dong-Wan; Oh, Hyon-Dong; Won, Dae-Yeon; Tahk, Min-Jea;
The design, dynamics, and control allocation of tri-rotor unmanned aerial vehicles (UAVs) are introduced in this paper. A trirotor UAV has three rotor axes that are equidistant from its center of gravity. Two designs of tri-rotor UAV are introduced in this paper. The single tri-rotor UAV has a servo-motor that is installed on one of the three rotors, which enables rapid control of its motion and its various attitude changes-unlike a quad-rotor UAV that depends only on the angular velocities of four rotors for control. The other design is called 'coaxial tri-rotor UAV,' which has two rotors installed on each rotor axis. Since the tri-rotor type of UAV has the yawing problem induced from an unpaired rotor's reaction torque, it is necessary to derive accurate dynamic and design control logic for both single and coaxial tri-rotors. For that reason, a control strategy is proposed for each type of tri-rotor, and nonlinear simulations of the altitude, Euler angle, and angular velocity responses are conducted by using a classical proportional-integral-derivative controller. Simulation results show that the proposed control strategies are appropriate for the control of single and coaxial tri-rotor UAVs.
Tri-rotor;Control strategy;Attitude control system design;
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