Optimal trajectory generation and tracking for a helicopter in tail rotor failure

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2022-8-23

Author

Arslan, Yusuf Onur

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Tail rotor failure is the main reason for a variety of helicopter accidents throughout aviation history. It is troublesome to control and navigate the helicopter to a predefined landing point with a non-functioning tail rotor especially if the number of available landing sites is limited. The objective of this thesis is to generate flight trajectories for a helicopter with a failed tail rotor and to track the trajectories by a controller. In this work, the generic helicopter model in FLIGHTLAB software is utilized and a tail rotor failed model is created. The path generation process is performed offline in MATLAB environment with an open-source trajectory optimization tool, OptimTraj. The trajectories are obtained for different scenarios by defining several constraints. An inversion-based controller is designed in order to bring the helicopter to a specified point in space by position trajectory tracking. An LQI controller is designed in order to change the trim condition of the helicopter by state trajectory tracking. The trajectories are given as a reference to the tracking controllers and simulations are performed with both linear and nonlinear models by communicating FLIGHTLAB and SIMULINK.

Subject Keywords

Helicopter tail rotor failure, Trajectory generation, Trajectory tracking, Optimization, Control

URI

https://hdl.handle.net/11511/99801

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Graduate School of Natural and Applied Sciences, Thesis

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Citation Formats

Y. O. Arslan, “Optimal trajectory generation and tracking for a helicopter in tail rotor failure,” M.S. - Master of Science, Middle East Technical University, 2022.