Robust adaptive control for spacecraft attitude synchronization subject to external disturbances: A performance adjustable event-triggered mechanism

INTERNATIONAL JOURNAL OF ROBUST AND NONLINEAR CONTROL(2023)

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Abstract
This article addresses the leader-following synchronization problem of multiple rigid spacecraft systems affected by external disturbances with the directed topology. An event-triggered distributed observer is proposed to estimate the leader's state. By integrating a performance adjustable function (PAF) into the event-triggered mechanism, the sampling frequency and estimation speed can be adjusted. Based on the event-triggered distributed observer, an adaptive event-triggered control scheme is proposed to aganist the external disturbances. With the adaptive event-triggered control scheme, continuous communication between spacecraft is no longer required and Zeno-free property can be guaranteed. The effectiveness of the theoretical results is verified by a numerous example.
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Key words
leader-following consensus,performance adjustable,robust adaptive control,spacecraft attitude synchronization
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