Trajectory Tracking Control for Electro-Optical Tracking System Using ESO Based Fractional- Order Sliding Mode Control

In this study, to achieve high trajectory tracking performance in electro-optical systems under strong nonlinear disturbances and uncertainties, we develop a extended state observer (ESO) based fractional-order sliding mode control. When compared with previous work, the new compound control strategy is attractive terms of following three points. First, novel controller developed that integrates advantages ESO, nonsingular terminal (FONTSM) manifold, super-twisting algorithm. Second, ESO employed estimate uncertainties without explicit knowledge system model. Third, FONTSM manifold-based algorithm integrated into enhance robustness. The manifold has faster dynamical response, more flexible structure, better results than its integer-order NTSM counterpart. finite-time convergences are both proved by Lyapunov method. Finally, comparative experimental demonstrate effectiveness superiority respect existing approaches.