Unpublished conference/Abstract (Scientific congresses and symposiums)
Shock qualification facilities of spatial electronic devices using pyrotechnic excitation
Wattiaux, David; Conti, Calogero; Hadjit, R.
20036th National Congress on Theoretical and Applied Mechanics
 

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Abstract :
[en] During space flights, pyrotechnic devices are used for various purposes as booster separation, unfolding solar panels or activation of propellant valves. The fir- ing of these pyrotechnic devices generates a severe shock wave, characterised by a high intensity and a wide frequency range, which can damage the surrounding electronic equip- ments. Test specifications imposed to embarked electronic devices are generally defined as a maximum limit imposed to the Shock Response Spectrum. Specific qualifications facilities have been developed in collaboration with Alcatel ETCA. They are based on sus- pended plate structures supporting the tested electronic de- vice, and submitted to a shock generated by an explosive cord. A trial and error experimental procedure is generally applied to tune the operating parameters in order to satisfy the launcher's specifications. This paper presents a simulation of the testing procedure in order to predict the Shock Response Spectrum. Such a model facilitates the determination of the adequate operat- ing conditions. It is based on a finite elements model of the structure, which has been updated using an experimental modal anal- ysis. Different excitation models are tested, such as an equivalent mechanical shock located at a fixed point in the vicinity of the explosive charge, or the propagation along the plate of a wave shock. Vibration measurements on the testing device and air pressure measurements have been ex- perimentally obtained.
Disciplines :
Mechanical engineering
Physics
Author, co-author :
Wattiaux, David ;  Université de Mons > Faculté Polytechnique > Mécanique rationnelle, Dynamique et Vibrations
Conti, Calogero ;  Université de Mons > Faculté Polytechnique > Mécanique rationnelle, Dynamique et Vibrations
Hadjit, R.
Language :
English
Title :
Shock qualification facilities of spatial electronic devices using pyrotechnic excitation
Publication date :
01 January 2003
Number of pages :
1
Event name :
6th National Congress on Theoretical and Applied Mechanics
Event place :
Gand, Belgium
Event date :
2003
Research unit :
F703 - Mécanique rationnelle, Dynamique et Vibrations
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