A Decentralized Approach Based on Unknown Input Observers for Actuator Fault Detection and Isolation of a Class of Interconnected Nonlinear Systems
نویسندگان
چکیده
Thisipaperipresentsiainovelidecentralizedischemeiforiactuatorifaultidetectioniandiisolationiofiaiclassiofilargescalei interconnectedinonlinearisystems. iFor ieachiof i thei interconnectedisubsystems, ia i local inonlineariunknown iinput observeri(UIO)iisidesignediwithoutitheineeditoicommunicateiwithiotheriagents.iTheiinterconnecteditermsiareitreatedias unknowniinputs,ihenceiallisubsystemsiareidecoupledicompletelyianditheiinformationiofiotherisubsystemsiisinotineededifor faultidetectioniandiisolation.iIniadditionitoitheiinterconnections,ianiexogenousidisturbanceiwhichicontainsibothisystem andimeasurementinoiseiisiapproximatelyidecoupled.iToifacilitateitheiobserveridesign,isufficienticonditioniforiexistenceiof theidesignediobserveriisiformulatediinitermsiofiaisetiofilinearimatrixiinequalitiesi(LMIs)iandioptimaligainimatricesiare obtained. iA i simulation i example i of i an i automated i highway i system i demonstrates i the i effectiveness i of i the i proposed methodology.
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