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The Scientific World Journal
Volume 2014, Article ID 104052, 14 pages
http://dx.doi.org/10.1155/2014/104052
Research Article

Anomaly Monitoring Method for Key Components of Satellite

1College of Information Systems and Management, National University of Defense and Technology, Changsha 410073, China
2Department of Telecommunications and Systems Engineering, University of Barcelona, 08202 Barcelona, Spain

Received 29 October 2013; Accepted 8 December 2013; Published 22 January 2014

Academic Editors: J. M. Corchado Rodríguez and M. Riera-Guasp

Copyright © 2014 Jian Peng et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This paper presented a fault diagnosis method for key components of satellite, called Anomaly Monitoring Method (AMM), which is made up of state estimation based on Multivariate State Estimation Techniques (MSET) and anomaly detection based on Sequential Probability Ratio Test (SPRT). On the basis of analysis failure of lithium-ion batteries (LIBs), we divided the failure of LIBs into internal failure, external failure, and thermal runaway and selected electrolyte resistance ( ) and the charge transfer resistance ( ) as the key parameters of state estimation. Then, through the actual in-orbit telemetry data of the key parameters of LIBs, we obtained the actual residual value ( ) and healthy residual value ( ) of LIBs based on the state estimation of MSET, and then, through the residual values ( and ) of LIBs, we detected the anomaly states based on the anomaly detection of SPRT. Lastly, we conducted an example of AMM for LIBs, and, according to the results of AMM, we validated the feasibility and effectiveness of AMM by comparing it with the results of threshold detective method (TDM).