Acompositedintegratedguidanceandcontrol(IGC)algorithmispresentedtotackletheproblemoftheIGCdesigninthepephaseforthebank-to-turn(BTT)vehiclewiththeinaccuracyinformationoftheline-of-sight(LOS)rate.Forthesakeoftheoreticalderivation,anIGCmodelinthepitchplaneisestablished.Thehigh-orderfinite-timestateobserver(FTSO),withtheLOSangleasthesingleinput,isemployedtoreconstructthestatesofthesystemonline.Besides,acompositedIGCalgorithmispresentedviathefusionofback-steppinganddynamicinverse.ComparedwiththetraditionalIGCalgorithm,theproposedcompositedIGCmethodcanattenuateeffectivelythedesignconservationoftheflightcontrolsystem,whiletheLOSrateismixedwithnoise.Extensiveexperimentshavebeenperformedtodemonstratethattheproposedapproachisgloballyfinite-timestableandstronglyrobustagainstparameteruncertainty.
