Novel finite-time attitude control of postcapture spacecraft with input faults and quantization |
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Institution: | 1. Unmanned System Research Institute, Northwestern Polytechnical University, Xi’an 710072, China;2. School of Aeronautics and Astronautics, Central South University, Changsha 410083, China |
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Abstract: | This paper investigates a novel finite-time attitude control method for the postcapture spacecraft with an unknown captured space target in the presence of input faults and quantization. First, a quasi fixed-time convergent performance function is developed to quantitatively characterize the attitude tracking performance. Then, a backstepping prescribed performance attitude controller is devised via using integral barrier Lyapunov function. Compared with the existing works, the fractional state feedback and discontinuous controller is directly avoided to achieve the fixed-time convergence rate. Namely, the proposed fixed-time controller is easily achieved online. Finally, two groups of illustrative examples are organized to validate the effectiveness and robustness of the proposed control method. |
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Keywords: | Prescribed performance Finite-time control Spacecraft attitude control Robust control |
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