Development and Validation of a Tool for the Qualification of the Vega Payloads Vs. Shock Environment
Abstract
In the frame of this investigation, the EQM of a small RF unit and the MSTH of a large digital unit have been exposed to two different shock environments. The first one is close to a satellite environment and the second environment is typical of a mechanical qualification test. The present study enables the comparison of the equipment response, in terms of acceleration, strain and I/F forces, in these two environments. The investigation first points out the difficulty to measure the true acceleration field, in and out of the plane, at the base of the equipment on a satellite panel. In the frame of this investigation, a specific instrumentation has provided the best information possible on the acceleration field. For each axis of the mechanical excitation, the equipment response expressed in SRS terms has been normalized to meet the same base acceleration in both environments. This has allowed distinguishing the amount of over-testing due to the impedance of the supporting structure from the amount of over-testing associated to the overall specification process.
- Publication:
-
12th European Conference on Spacecraft Structures, Materials and Environmental Testing
- Pub Date:
- July 2012
- Bibcode:
- 2012ESASP.691E.154B