IDENTIFICATION

REAL-TIME FLUTTER PREDICTION INCLUDING CLOSE MODES CAN BE EFFECTIVELY ESTIMATED FROM TURBULENCE OR ON-BOARD EXCITATIONWITH AN EXTENDED KALMAN FILTER(EKF) APPROACH. THE THE PHYSICALLY BASED MODEL FORM ENABLES PREDICTION OF THE DAMPING RATE AS WELL AS DAMPING GIVING A TIME TO UNSTABILITYESTIMATE WITH IT'S VARIANCE. THE APPROACH IS RECURSIVE AND CAN OPERATE A SYNNCCHRON AND CAN OPERATE A SYNCHRONOUSLY TO DROP ATA OUTLINERS AND HENCE IS QUITE ROBUST. IT'S SPEED IS REASONABLE FOR ON-LINEAPPLICATION BUT ALSO CAN BE USED EFFECTIVELY AS AN OFF-LINE ANALYSIS TOOL FOR APPLICATION TO ANY MODEL TESTING SITUATION.