Modern Modal-Identification Analysis

P. Deloo et al.

The ISSPA computer program allowing the modal identification of structures from sine-vibration-test data has been integrated into DynaWorks 4.0 and applied successfully for the characterisation of several space structures. Its integration into a system such as DynaWorks provides increased capabilities within the modal-identification process as well as greater flexibility and user-friendliness.

This article describes the user interface that was specifically developed to handle the ISSPA module in terms of data selection, management of identification sequences and all of the graphical displays which are so indispensable if one is to work efficiently on practical applications. A practical application of the new tool to a complete satellite, performed at ESTEC and Intespace in early 1997, is also reported.