HPS GmbH

Customer: ESA/ESTEC (2007 – 2008)
	This study, contracted by ESTEC, addresses random vibration environment prediction methodologies with improved parametric capabilitis.

Compared to existing analysis approaches it also addresses more time efficiency and accurate procedures. The selected application reference was a satellite main structure (out of CFRP sandwiches) with cavities inside and attached electronic boxes and brackets. A breadboard test program has been conducted, whereas respective hardware has been designed and manufactured in order to support the proper development of software tools with associated vibro-acoustic analysis methods.

The complete objectives of this activity are:

• Survey and review of existing numerical tools and analytical methods
• Survey of primary and secondary satellite structures, payload and equipment parameters,
• Accurate prediction of the acoustic-induced random vibration loads for spacecraft equipment and instruments, by analytical derivation,
• Accelerations and forces at the I/F of the equipment resulting from the acoustic environment to be predicted with consolidated methodologies,
• Parametric study for preliminary specifications, including stiffness and acoustic loading parameters,
• Modal and vibro-acoustic testing
• Detailed correlation of the mathematical models with experimental results
• Set up of engineering guidelines for future use.

The study was conducted with subcontractors from France (ESI) and Germany (IABG).