Cooperative Tracking Control for Formation Keeping of Fractionated Spacecraft Based on Error Exchanging

Abstract:

This paper discusses the cooperative control for formation keeping of fractionated spacecraft, which is a new concept in recent years. For system of second-order differential equations of formation flying dynamics, knowledge of graph and consensus theory is introduced in study. By means of the idea of sliding mode control, we design a tracking control law for time-varying desired signal. Via exchanging error information among modules, the control law can make errors synchronized up to zero to achieve tracking. Relative velocity information between modules is not needed in this control law, which will efficiently reduce the requirements for relative navigation between modules. Then we prove the stability of the control system. Finally numerical simulation results show the effectiveness of the control law. By configuring the control parameters reasonably, we can achieve high degree of control accuracy.

• Periodical: Advanced Materials Research (Volume 1016)
• Pages: 649-654
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1016.649
• Online since: August 2014
• Authors: Ya Feng Niu*, Yong Ming Gao
• Keywords: Consensus, Cooperative, Formation Keeping, Fractionated Spacecraft, Graph

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