通信受限下基于终端滑模和指对数滑模方法的编队航天器姿态协同控制

针对星间通信时延和信号量化情形下编队航天器,研究对应的姿态协同控制器设计问题.首先,为节省编队航天器星间通信的带宽资源,提出基于信号量化的星间数据通信策略,并设计了一种终端滑模姿态协同控制器以保证航天器编队姿态同步系统的渐近稳定；其次,考虑到航天器间可能存在通信时延,考虑基于信号量化的通信策略,提出一种基于指对数滑模面的编队航天器协同控制器设计方法,能保证编队航天器在有限时间内达到期望姿态；最后基于包含4个航天器的编队系统,通过仿真验证了所提出的协同控制方法的有效性.

Cooperative attitude control for spacecraft formation with limited communication based on terminal and exponent-logarithmic sliding mode

The cooperative attitude control is addressed for spacecraft formation with unreliable communication and signal quantization among spacecrafts.First,to save the data rate and bandwidth among the spacecrafts,a signal quantization communication strategy is proposed among each two spacecrafts in the formation,and a terminal sliding mode attitude control law is developed to ensure the asymptotic stability of the spacecraft formation attitude synchronization systems.Second,to compensate the effects of communication delay and signal quantization,an exponent-logarithmic sliding mode surface design is presented,based on which a cooperative attitude control strategy is developed for spacecraft formation to achieve desirable attitude in finite-time.Finally,a simulation example with four spacecrafts in a formation system is provided to verify the effectiveness of the proposed cooperative control method.