Distributed finite-time velocity-free attitude coordination control for spacecraft formations

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• 作者：An-Min Zou ^{amzou2012@gmail.com" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Anton H.J. de Ruiter ^{aderuiter@ryerson.ca" class="auth_mail" title="E-mail the corresponding author}Author Vitae ; Krishna Dev Kumar ^{kdkumar@ryerson.ca" class="auth_mail" title="E-mail the corresponding author}Author Vitae
• 关键词：Attitude coordination control ; Spacecraft formation flying ; Finite-time control ; Velocity-free ; Homogeneous method
• 刊名：Automatica
• 出版年：2016
• 出版时间：May 2016
• 年：2016
• 卷：67
• 期：Complete
• 页码：46-53
• 全文大小：710 K

文摘

In this paper, the finite-time velocity-free attitude coordination control for spacecraft formation flying under an undirected communication graph is addressed. A finite-time observer is introduced to obtain an accurate estimation of unmeasurable angular velocity and a decentralized finite-time observer is employed to estimate the angular acceleration of the virtual leader. With the application of the finite-time observer, the decentralized finite-time observer, and the homogeneous method, a continuous distributed finite-time attitude coordination control law is designed for a group of spacecraft without requiring angular velocity measurements. A rigorous proof shows that semi-global finite-time stability of the overall closed-loop system can be achieved and the proposed velocity-free control law guarantees a group of spacecraft to simultaneously track a common time-varying reference attitude in finite time even when the reference attitude is available only to a subset of the group members. The performance of the control scheme derived here is illustrated through numerical simulations.