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2016-2017学年第一学期航空航天系第十二期学术讲座
发表时间:2016-12-28 阅读次数:702次

题目:Dynamics and Control of Electrodynamic Tether and its Application in Space Debris Removal

主讲:Zheng H. Zhu Professor

主持:丁淑蓉 教授

时间:2016年12月28日(周三)上午10:00

地点:光华楼东主楼2601室

教授简介

Zheng H. Zhu received his B.Eng., M.Eng. and Ph.D. degrees in engineering mechanics from Shanghai Jiao Tong University. He also received his M.A.Sc. in robot control from University of Waterloo and Ph.D. in mechanical engineering from University of Toronto all located in Ontario, Canada. He is currently a professor with the Department of Mechanical Engineering at York University. Dr. Zhu has authored 190 articles with 97 peer-reviewed journal articles. His research interests include dynamics and control of tethered space system, space robots and nano-enhanced multifunctional spacecraft structures. He is the Editor-in-chief of the International Journal of Space Science and Engineering. Dr. Zhu is a fellow of Engineering Institute of Canada, Associate fellow of American Institute of Aeronautics and Astronautics, Fellow of Canadian Society of Mechanical Engineering, senior member of IEEE, member of American Society of Mechanical Engineers.

内容简介

Electrodynamic tether (EDT) is an innovative propulsion technology that can perform orbit boost or deorbit maneuver without consuming propellant, but is intrinsically unstable. We developed a new-coupled multiphysics finite element method for the dynamic analysis of bare and flexible electrodynamic tethers and their application in satellite deorbit. The mechanical deformation of tether is coupled with the plasma particle orbital motion limited theory. The latter is directly discretized by the finite element method together with the flexible tether dynamics by the same finite element mesh. The discretized equations in different domains are solved together. The simulation results demonstrate the significance of the coupling effect. A simple and effective control strategy based on the Hamiltanion of flexible tethers is derived for the deorbit process. The new finding shows the space debris deorbit with EDTs is advantageous in term of mass saving compared with other convensional approaches. 

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