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Design of a Robust Controller Using Real Twisting Algorithm for a Fixed Wing Airplane

In this paper focused on design of a second order sliding mode controller for a fixed wing airplane using real twisting algorithm. Simple sliding mode controller creates chattering in the system. Therefore, to avoid this problem, higher order sliding mode controllers as a robust controller is preferred. The design of this controller has two steps. At first, a suitable sliding manifold will be selected. Then, the controller is designed using real twisting algorithm which is a method for second order sliding mode controller design. In this algorithm the states of the system twist around the sliding surface and remain on it. Moreover, to compare the performance of the controller, a first order sliding mode controller is designed. Results demonstrate that, with real twisting method, states of the system converge to trim point in a finite time and system has good performance under this controller.