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Application of sliding mode assist disturbance observer on flight simulator

Zuo Jingxing, Wu Yunjie, Li He

Abstract: A novel approach for disturbance observing assisted by terminal sliding mode is proposed, due to the fact that the traditional disturbance observer underestimates the high frequency disturbances in flight simulator system. One terminal sliding mode surface and a new kind of control scheme is defined, which makes the system meet the stability condition. Estimation and compensation of the high frequency disturbances are available by the high-speed switching controller in the auxiliary system. Then the high accuracy control for the flight simulator is achieved with the help of sliding mode controller. The experiment on one flight simulator shows that, controller based on terminal sliding mode assist disturbance observer has a better performance with more robustness against external disturbance in angle tracking than the controller based on traditional disturbance observer.
Keywords: Observers / Mathematical model / Frequency estimation / Low-pass filters / Friction / Robustness

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