Present modal model identification methods and procedures are limited to forced excitation laboratory tests. The interest in in-operation modal analysis stems from the fact that in many cases (small excitation of offshore platforms, traffic/wind excitation of civil constructions) forced excitation test are very difficult, if not impossible, to conduct, at least with standard testing equipment. Furthermore, the availability of in-operation established models opens the way for in situ model-based diagnosis and damage detection. Hence, a considerable interest exists for techniques able to extract valid models directly from operating data. - The disgn of a global and robust strategy for the identification of the modal parameters from operational "outpit-only" measurements, based on a multivariable frequency-domain Maximum Likelihood approach. - The evaluation of the procedure on pratical measurement problems in the field of operational modal analysis: 1) the in-situ charaterisation of composit materials from non-contact LDV operational measurements (for damage detection purposes). 2) the operational modelling of e.g. agricultural spraying machines (for control purposes).
|Effective start/end date||1/01/00 → 31/12/03|
Flemish discipline codes
- Mechanical and manufacturing engineering
- Electrical and electronic engineering
- Mathematical sciences
- operational modal analysis
- system identification