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Observability and Estimation of Distributed Space Systems via Local Information-Exchange NetworksIn this work, we develop an approach to formation estimation by explicitly characterizing formation's system-theoretic attributes in terms of the underlying inter-spacecraft information-exchange network. In particular, we approach the formation observer/estimator design by relaxing the accessibility to the global state information by a centralized observer/estimator- and in turn- providing an analysis and synthesis framework for formation observers/estimators that rely on local measurements. The noveltyof our approach hinges upon the explicit examination of the underlying distributed spacecraft network in the realm of guidance, navigation, and control algorithmic analysis and design. The overarching goal of our general research program, some of whose results are reported in this paper, is the development of distributed spacecraft estimation algorithms that are scalable, modular, and robust to variations inthe topology and link characteristics of the formation information exchange network. In this work, we consider the observability of a spacecraft formation from a single observation node and utilize the agreement protocol as a mechanism for observing formation states from local measurements. Specifically, we show how the symmetry structure of the network, characterized in terms of its automorphism group, directly relates to the observability of the corresponding multi-agent system The ramification of this notion of observability over networks is then explored in the context of distributed formation estimation.
Document ID
20110013194
Acquisition Source
Jet Propulsion Laboratory
Document Type
Conference Paper
External Source(s)
Authors
Rahmani, Amirreza
(Washington Univ. United States)
Mesbahi, Mehran
(Washington Univ. United States)
Fathpour, Nanaz
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Hadaegh, Fred Y.
(Jet Propulsion Lab., California Inst. of Tech. Pasadena, CA, United States)
Date Acquired
August 25, 2013
Publication Date
August 18, 2008
Subject Category
Documentation And Information Science
Meeting Information
Meeting: AIAA Guidance, Navigation, and Control Conference
Location: Honolulu, HI
Country: United States
Start Date: August 18, 2008
Sponsors: American Inst. of Aeronautics and Astronautics
Distribution Limits
Public
Copyright
Other
Keywords
observability
Distributed space systems
algebraic graph theory
automorphism group
networked systems
agreement dynamics

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