Attitude control of spacecraft using robust backstepping controller based on high order sliding modes

In this paper, a robust control law for attitude tracking is proposed for a spacecraft. The problem is addressed using disturbance compensation techniques. The proposed controller uses the backstepping design procedure and combines the feedback linearization technique with the high-order sliding-modes based identification. The disturbance is compensated using a differentiable estimated that is provided by a High-Order Sliding Mode. The control signal generated by the proposed methodology does not require filtration, and provides exact exponential tracking of smooth command signals. Simulations illustrate the performance of the proposed controller.