SHOCK QUALIFICATION METHODS FOR EQUIPEMENTS

摘要

The currently used process for equipment qualificationto shock uses Shock Response Spectra (SRS) calculatedfrom acceleration test measurements at spacecraft level.This method looses some information, especiallyconcerning the shock duration. Moreover the finalspecification is usually an envelope of one or more SRS,resulting in a simplified SRS.The test benches used to qualify the equipmentsgenerate particular excitation, which may beincompatible with the specified SRS shape. This canlead to either under- or over-qualification.Thus this shock qualification process is not completelysatisfactory and could be improved. A CNES R&Dactivity has been lead by EADS Astrium in this way.Real shock acceleration measurements at equipmentinterfaces have been compared to accelerationmeasurements during their qualification shock test inorder to point out their differences.Two new data processing tools have been developed byRMS. These tools were designed to give a simple butreliable description of the shock signal. One of them hasbeen chosen for the last step of the study. The aim is touse this developed tool to define adequatespecifications.