Modeling of a Large Undamped Space Structure Using Time Domain Techniques

摘要

The first phase of this project was the selection of accurate time domain statespace modeling techniques by comparing the models generated by various methods, against a known system. The techniques selected were the Eigensystem Realization Algorithm and the Backward Least Squares method. These modeling techniques were applied to the vibration data from the PACOSS dynamic test article. The resulting model transfer function was then compared to the frequency response function of the actual system, and was found to be an accurate match for the system poles, but not for the system zeros. Large Space structures, Dynamic Control, System Mode Structural vibration, Flexible Spacecraft, System Identification.