Finite-Time Synchronization Control of Spacecraft Formation With Network-Induced Communication Delay
Finite-Time Synchronization Control of Spacecraft Formation With Network-Induced Communication Delay
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DOI：
10.1109/access.2017.2772319
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发表时间：
2017-11
期刊：
影响因子：
3.9
通讯作者：
Ruixia Liu;Xibin Cao;Ming Liu
中科院分区：
文献类型：
--
作者：
Ruixia Liu;Xibin Cao;Ming Liu
本文研究了无向连通图下、存在未知外部干扰和通信时延的情况下航天器编队飞行的分布式轨道同步控制。针对航天器编队，提出了一种非奇异快速终端滑模（NFTSM）控制策略，可以解决终端滑模（TSM）控制的奇异性和缓慢收敛问题。考虑到所实现的切比雪夫神经网络（CNN）的基函数只需要期望信号，因此采用CNN来逼近非线性函数和有界外部扰动。基于NFTSM和CNN近似，设计了分布式有限时间同步控制律，并从理论上证明了其有限时间收敛性。此外，为了保证具有通信时滞的航天器编队控制的良好性能，还给出了一种具有通信时滞的分布式有限时间同步控制方案，并证明了闭环控制系统中所有信号的一致最终有界性。最后，通过数值例子证明了所提出的控制策略的有效性。
This paper addresses the distributed orbit synchronization control of spacecraft formation flying under an undirected connected graph and in the presence of unknown external disturbances and communication time-delay. A nonsingular fast terminal sliding mode (NFTSM) control strategy, which can solve the singularity and slow convergence to the equilibrium problems of terminal sliding mode (TSM) control, is developed for spacecraft formation. Considering only desired signals are needed for the basis functions of Chebyshev neural networks (CNN) implemented, a CNN is employed to approximate the nonlinear function and bounded external disturbances. Based on the NFTSM and CNN approximation, a distributed finite-time synchronization control law is designed and its finite-time convergence property is proven in theory. Moreover, in order to guarantee good performance for the spacecraft formation control with communication delay, a distributed finite-time synchronization control scheme with communication delay is also given and the uniform ultimate boundedness of all signals in the closed-loop control system is proven. Finally, a numerical example is illustrated to demonstrate the effectiveness of the proposed control strategies.