title: Anomaly monitoring method for key components of satellite.
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 (R(e)) and the charge transfer resistance (R(ct)) 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 (R(X)) and healthy residual value (R(L)) of LIBs based on the state estimation of MSET, and then, through the residual values (R(X) and R(L)) 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).
authors.affiliation: College of Information Systems and Management, National University of Defense and Technology, Changsha 410073, China.
authors.forename: Jian
authors.identifier: 0000-0002-1853-6386
authors.initials: J
authors.lastname: Peng
authors.affiliation: College of Information Systems and Management, National University of Defense and Technology, Changsha 410073, China.
authors.forename: Linjun
authors.initials: L
authors.lastname: Fan
authors.affiliation: College of Information Systems and Management, National University of Defense and Technology, Changsha 410073, China.
authors.forename: Weidong
authors.initials: W
authors.lastname: Xiao
authors.affiliation: Department of Telecommunications and Systems Engineering, University of Barcelona, 08202 Barcelona, Spain.
authors.forename: Jun
authors.initials: J
authors.lastname: Tang
mesh_terms: D017097:Electric Impedance; D004573:Electrolytes; D008962:Models, Theoretical
chemical_list: D004573:Electrolytes