Yi Lung Mo
University of Houston
USA
Title: Periodic material-Based vibration isolation for satellites
Biography
Biography: Yi Lung Mo
Abstract
The vibration environment of a satellite is very severe during launch. Isolating the satellite vibrations during launch will significantly enhance reliability and life-span, and reduce the weight of satellite structure and manufacturing cost. Guided by the recent advances in solid-state physics research, a new type of satellite vibration isolator is proposed by using periodic material that is hence called periodic isolator. The periodic isolator possesses a unique dynamic property, i.e., frequency band gaps. External vibrations with frequencies falling in the frequency band gaps of the periodic material-based satellite system were to be mitigated. Using the elastodynamics and the Bloch-Floquet theorem, the frequency band gaps of periodic isolators were determined. A parametric study was conducted to provide guidelines for the design of periodic isolators. Based on these analytical results, a finite element model of a micro-satellite with a set of designed periodic isolators was built to show the feasibility of vibration isolation. The periodic isolator was found to be a multi-directional isolator that provides vibration isolation in the three directions.