A method is presented for estimating displacements, velocities, and accelerations of structural modes in generalized coordinates from measured sensor data in real time. Specifically, strain data from conventional strain gauges and fiber optic strain sensors (FOSS) were combined with the strain modes (obtained from a finite element model) in a least-squares estimator to produce structural mode displacement estimates and uncertainties. Likewise, accelerometer data were combined with displacement mode shapes in a second least-squares estimator to produce structural mode acceleration estimates. A Kalman filter was then used to refine the displacement estimates and obtain velocity estimates. The method was applied to the half-span wind tunnel test article used in the NASA-Boeing collaboration called the Integrated Adaptive Wing Technology Maturation (IAWTM) project. The technique was found to be useful for real-time control and system identification applications.


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    Title :

    Real-Time State Estimation of Structural Modes for an Aeroelastic Wind Tunnel Model


    Contributors:

    Conference:

    2021 AIAA SciTech Forum ; 2021 ; Nashville, TN, US


    Type of media :

    Conference paper


    Type of material :

    No indication


    Language :

    English


    Keywords :