Applications of structural model identification during normal operating conditions: An overview of the EUREKA project SINOPSYS

Since, in many modelling applications, the real operating conditions may differ significantly from those applied during a laboratory modal test, the need arises to identify modal models in operational conditions. In most cases, only response data are measurable while the actual loading conditions are unknown. Therefore, the system identification process will need to base itself on output-only data. Over the last years, several modal parameter estimation techniques have been proposed hereto. In the present paper, an overview is given of industrial applications that have been realised with these techniques, indicating the practical application constraints of the approaches, as well as the potential use that can be made of thus obtained models. The applications include automotive, aircraft, space, and civil construction case studies.