An Experimental Approach for the Characterization and Integration of Sources of Microvibration

Abstract eng:
Amongst many sources of microvibration onboard satellites, reaction wheels and momentum wheel assemblies are often considered the most significant. This article presents the development and validation of a microvibration model for a wheel assembly and its integration in the mathematical model of the satellite structure. The modeling the technique described here is then applied to an antenna pointing mechanisms to verify the approach is not limited to the modeling of wheel assemblies, but it is applicable also other sources of microvibrations. The mathematical model of the sources are developed from experimental test data, using a “black box” approach which does not require any knowledge of the internal features of the equipment. Different test campaigns were required to produce the test data necessary to define the parameters of the mathematical models. The theory and practicalities of the test campaigns are described in details discussing pros and cons of the approach taken. Finally some tests will be presented where the models of the sources, derived using the technique briefly described above, have been coupled with the finite element model of a more complex structure. The predictions of this integrated model are then compared with experimental data.

• Export as: BibTeX | MARC | MARCXML | DC | EndNote | NLM | RefWorks
• Add to your basket