An application of adaptive fault-tolerant control to nano-spacecraft

Han, Yu and Biggs, James and Cui, Naigang (2014) An application of adaptive fault-tolerant control to nano-spacecraft. In: 2nd Conference on Dynamics and Control of Space Systems, DyCoSS2, 2014-03-24 - 2014-03-26.

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    Abstract

    Since nano-spacecraft are small, low cost and do not undergo the same rigor of testing as conventional spacecraft, they have a greater risk of failure. In this paper we address the problem of attitude control of a nano-spacecraft that experiences different types of faults. Based on the traditional quaternion feedback control method, an adaptive fault-tolerant control method is developed, which can ensure that the control system still operates when the actuator fault happens. This paper derives the fault-tolerant control logic under both actuator gain fault mode and actuator deviation fault mode. Taking the parameters of the UKube-1 in the simulation model, a comparison between a traditional spacecraft control method and the adaptive fault-tolerant control method in the presence of a fault is undertaken. It is shown that the proposed controller copes with faults and is able to complete an effective attitude control manoeuver in the presence of a fault.