SYSTEM IDENTIFICATION FOR STRUCTURAL DYNAMICS AND VIBROACOUSTICS DESIGN ENGINEERING

摘要

System identification plays a crucial role in structural dynamics and vibro-acoustic system optimization. A number of industrially as well as socially relevant applications will be discussed. The most popular modeling approach is based on the "Modal Analysis" concept, leading to an interpretation in terms of visualized Eigenmodes. Using the modal models, design improvements can be predicted and the structure optimized. The main modal testing procedures and modal parameter identification methods are reviewed, including both input/output and output-only approaches. The current critical elements in system identification for these applications are outlined and discussed in the broader context of the changing role of testing in the product engineering process. New trends in modal analysis that specifically address these problems are reviewed and illustrated with case studies. This includes the issues of instrumentation, test definition, measurement principles and parameter estimation.