摘要
提出一种基于信息一致性的分布式协同控制策略,实现了卫星编队的构型建立、保持与整体机动。首先根据编队各星的初始相对状态,应用一阶一致性算法,协商估计出编队整体系统基准参考点的相对状态;再根据编队整体系统模型预测方程,以凸优化方法规划出期望重构机动路径;之后设计了基于二阶一致性算法的反馈协同控制律,使各星彼此协同地跟踪期望路径与构型、整体机动参考信息,并证明了系统的稳定性。仿真结果表明:只要在基准参考点一致性估计过程中信息拓扑图中存在最大生成树,该策略就能实现卫星编队的协同机动;反馈协同控制律能有效消除相对初始状态误差与地球非球形摄动J2项引起的各星状态偏离,并具有较好的容错性;与传统方法相比,本文方法在燃料消耗总量与均衡性方面均有所改善,且在构型快速建立或重构时,燃料消耗总量方面优势较为明显。
This article proposes a feasible cooperative control framework and strategy based on information consensus for the configuration initialization,maintenance and entire-formation maneuver of satellite formations.First,a reference point of the total formation system is estimated using the first order consensus algorithm according to the initial state of each satellite.Second,by employing the convex optimization technique,the desired reconfiguration paths are obtained based upon the model predictive function of the entire-formation system.Finally,a cooperative control law is designed based on the second order consensus algorithm which induces each satellite to track coordinately the desired path and reference information of the entire-formation maneuver.In addition,system stabilization is analyzed and realized.Simulation results demonstrate that the control strategy can implement the mentioned formation maneuver if the formation information topology contains a rooted directed spanning tree during the reference point consensus estimation;then each satellite trajectory deviation,caused by initial errors and J2 gravitational perturbation,can be eliminated effectively by the feedback cooperative control law,which demonstrates the fine fault-tolerant properties of the control strategy.A comparison of the strategy with the traditional method shows preliminarily that the proposed entire-formation system optimization strategy may reduce further fuel consumption,and that it can ensure approximately the same fuel consumption for the individual satellites within the formation.
出处
《航空学报》
EI
CAS
CSCD
北大核心
2010年第5期1004-1013,共10页
Acta Aeronautica et Astronautica Sinica
基金
高等学校博士学科点专项科研基金(20070699030)
关键词
卫星
编队构型
编队整体机动
路径规划
协同控制
一致性算法
信息拓扑
satellites
formation configuration
entire-formation maneuver
path planning
cooperative control
consensus algorithm
information topology
