Master Thesis - OUFTI-1

Chapter 4
Electronic cards dynamic modeling
4.1 Introduction
One of the most vulnerable part of a satellite is its electronic cards. During launch,
the electronic components are subjected to harsh random vibration environment and some
failures can occured. The probability of these failures is strongly inuenced by the local
PCB response. To prevent from this undesirable phenomenon and to avoid it, it is a current
practice to create FE models of electronic cards to predict their local vibration response.
Throughout this chapter, the problem of how to model the dynamic behavior of an
electronic card, will be discussed.
Firstly, we will go around the state-of-the-art in this domain. Multiple methods will be
presented and their accuracy will be briey discussed.
Then, these methods will be applied to a practical example: the homemade OBC (OBC
2) of OUFTI-1.
Finally, an experimental test will be performed and the results will be correlated with
the ones obtained by the FE model. The inuence of various parameters on the PCB
response will also be studied through some sensitivity analysis.
4.2 State-of-the-art
It should be noted that the information incorporated in this section come from references
[44] to [49] (especially from references [44] and [45]).
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