Gao Han, Xia Yuanqing, Liu Kun, Zhang Jinhui, Cui Bing
IEEE Trans Cybern. 2024 Sep;54(9):4973-4985. doi: 10.1109/TCYB.2024.3379389.
This work studies the attitude coordination tracking problem for multiple spacecraft with consideration of unintended faults (communication link faults and actuator faults), inertial uncertainties, and external disturbances under a directed communication graph. A resilient neuroadaptive distributed fixed-time control scheme is investigated to solve this challenging problem. First, an improved adaptive distributed observer is established for followers to estimate the states of the leader when considering communication link faults. The proposed observer improves the resilience against communication link faults. Subsequently, to further cope with the problem of actuator faults, inertial uncertainties, and external disturbances, based on the proposed observer and the technique of adding a power integrator, a neuroadaptive distributed fixed-time attitude coordination controller is developed. Unlike the existing controllers, the proposed one requires less information when dealing with faults and lumped uncertainties, and has a lower-computational cost. Moreover, the fixed-time stability of the closed-loop system is ensured under the designed resilient neuroadaptive distributed control scheme. Finally, comparative simulations are carried out to manifest the effectiveness of the investigated coordination control method.
这项工作研究了在有向通信图下，考虑意外故障（通信链路故障和执行器故障）、惯性不确定性和外部干扰的多航天器姿态协调跟踪问题。研究了一种弹性神经自适应分布式固定时间控制方案来解决这一具有挑战性的问题。首先，为跟随航天器建立了一种改进的自适应分布式观测器，用于在考虑通信链路故障时估计领航航天器的状态。所提出的观测器提高了对通信链路故障的弹性。随后，为了进一步应对执行器故障、惯性不确定性和外部干扰问题，基于所提出的观测器和添加幂积分器的技术，开发了一种神经自适应分布式固定时间姿态协调控制器。与现有控制器不同，所提出的控制器在处理故障和集中不确定性时所需信息较少，且计算成本较低。此外，在所设计的弹性神经自适应分布式控制方案下，确保了闭环系统的固定时间稳定性。最后，进行了对比仿真，以证明所研究的协调控制方法的有效性。
