Date of Award
Master of Science in Astronautical Engineering
Department of Aeronautics and Astronautics
Bradley S. Liebst, PhD
Large, lightweight space structures of the future will require state-of-the-art vibration suppression systems. To design such a system, it is necessary to have a mathematical model that adequately describes the motion of the system. Coulomb damping compensation was utilized to remove a known nonlinearity from the frequency response functions obtained from the Passive and Active Control of Space Structures (PACOSS) Dynamic Test Article (DTA). Via the Eigensystem Realization algorithm (ERA), the frequency response functions were then used to generate a mathematical representation of the structure's dynamics. Two models were obtained. The first model, without friction compensation, acted as a baseline. The second was obtained using friction compensation. Comparing the models, it was determined that active friction compensation was worthwhile and resulted in a more accurate mathematical description of the system.
DTIC Accession Number
Woods, Robert D., "A State-Space Model of a Large, Lightly Damped Space Structure Using the Eigensystem Realization Algorithm" (1994). Theses and Dissertations. 6333.