In a partially decentralized control architecture, more than one but less than all nodes have supervisory capability. This paper describes an approach to choosing the number of supervisors in such au architecture, based on a reliability vs. cost trade. It also considers the implications of these results for the design of navigation systems for satellite formations that could be controlled with a partially decentralized architecture. Using an assumed cost model, analytic and simulation-based results indicate that it may be cheaper to achieve a given overall system reliability with a partially decentralized architecture containing only a few supervisors, than with either fully decentralized or purely centralized architectures. Nominally, the subset of supervisors may act as centralized estimation and control nodes for corresponding subsets of the remaining subordinate nodes, and act as decentralized estimation and control peers with respect to each other. However, in the context of partially decentralized satellite formation control, the absolute positions and velocities of each spacecraft are unique, so that correlations which make estimates using only local information suboptimal only occur through common biases and process noise. Covariance and monte-carlo analysis of a simplified system show that this lack of correlation may allow simplification of the local estimators while preserving the global optimality of the maneuvers commanded by the supervisors.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Partially Decentralized Control Architectures for Satellite Formations


    Contributors:

    Conference:

    AIAA GNC Conference ; 2002 ; Monterey, CA, United States


    Publication date :

    2002-01-01


    Type of media :

    Preprint


    Type of material :

    No indication


    Language :

    English





    AIAA-2002-4959 Partially Decentralized Control Architectures for Satellite Formations

    Carpenter, J. / AIAA | British Library Conference Proceedings | 2002




    A Preliminary Investigation of Decentralized Control for Satellite Formations

    Carpenter, J. R. / Institute of Electrical and Electronics Engineers | British Library Conference Proceedings | 2000