Abstract
In this paper, we present an adaptive quantized attitude control scheme for spacecraft with input saturation. By using a smooth function to approximate the saturation nonlinearity and decomposing the quantizer in a new way, we ensure that the disturbance-like terms are bounded and the system is suitable for backstepping design. Then, with the aid of a bound estimation approach and an integrable auxiliary signal, the effects of input quantization and saturation are successfully counteracted. It is shown that all signals of the closed-loop system are bounded and the attitude error can asymptotically approach to zero. Simulation results are presented to illustrate the effectiveness of the proposed control scheme.
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