A Process for Time Domain Identification of a Flexible Aircraft Model from CFD/CSM Simulations

Abstract

The present work describes a process to estimate parameters of a complete flexible aircraft model from virtual flight test (VFT) data using the output error method (OEM) in time domain. The VFT data are generated with a multidisciplinary, numerical, high-fidelity tool which couples CFD aerodynamics, flight mechanics, and structural dynamics in space and time. The challenge to identify all relevant parameters was met by a dedicated iteration process accounting for different structural modes. One single model identification at a specific flight point was performed and shows the successful applicability of the process. The applicability of the process to other aircraft types and the expansion to other flight points is pointed out and also subject to further work.