Analysis of Accelerometer Data from a Woven Inflatable Creep Burst Test

Abstract

Accelerometers were used to montor an inflatable test article during a creep test to failure. The test article experienced impulse events that were classified based on the response of the sensors and their time-dependent manifestation. These impulse events required specialized techniques to process the structural dynamics data. However, certain phenomena were defined as worthy of additional study. An assessment of one phenomena (a frequency near 1000Hz) showed a time dependent frequency and an amplitude that increased significantly near the end of the test. Hence, these observations are expected to drive future understanding of and utility in inflatable space structures. = impulse response function Akji = amplitude for the reference i, response j, increment k ωk = kth increment frequency ξk = kth increment damping ratio tQ = maximum time point used in IRF fit Nomenclature

Review of Habitable Softgoods Inflatable Design, Analysis, Testing, and Potential Space Applications

“…The photogrammetry measurements fall below the predicted strain levels, and further work is needed to perfect the photogrammetry technique on softgoods. Further details on the strain measurements can be found in the reference paper 21 , along with a companion paper that discusses the dynamic measurements of the accelerometers 22 .…”