Aeroelastic system identification using the minimum model error method

The minimum model error method is applied to identify,models of a panel undergoing limit-cycle oscillations. This work is focused on identification using free-response position and velocity measurements. The response of the panel was obtained using two discretization approaches: through the use of finite differences and by Galerkin's method. Data from both transient and steady-state parts of the response are used for identification. The models obtained using the steady-state part of the free response were not able to capture the behavior of the true system. The models obtained using the transient part of the free response were able to capture the behavior of the panel very accurately. Accuracy of identified models of various model orders is also discussed.