A Large Multi-Channel Measurement Facility for Both Modal Survey and Multi-Axis Vibration Testing.

Kurzfassung

Mechanical verification logic of spacecraft structures includes modal survey as well as shake table testing. The purpose of the former one is the dynamic identification of the structure, while the latter serves for mechanical qualification. Up to now both tests have in most cases been performed separately using different suitable test and measurement facilities. The DLR runs a large mobile modal survey test facility with more than 700 simultaneous measurement channels. In order to make use of these measurement capabilities, also for application at shake tests, the measurement system has been adjusted and refined to be used for both types of tests. The measurement facility has been applied successfully at several shake tests on DLR's multi-axis vibration simulators MAVIS. Test applications and results are presented to illustrate the capabilities of the test facility.