Results are presented from an experimental investigation of the mirodynamics of deployable space structures. The dynamic response of a representative deployable truss at submicrostrain levels of vibration was characterized In trems of modal parameters. The test article was subjected to stepped-sine stepped-sine sweeps through its fundamental flexible Modes over a range of excitation amplitudes. High-sensitivity piezoceramic strain sensors were used in conjunction With a lock-in amplifier to measure the truss response from tens of microstrain down to one nanostrain.
展开▼
