题目：电动力绳作用下立方体卫星离轨实验（A CubeSat Deorbit Experiment Mission Using an Electrodynamic Tether）
报告人：朱正宏教授（Department of Earth and Space Science and Engineering, York University in Toronto, Canada）
时间：2016年4月28日10:00
地点：A18-705
主办单位：国际合作交流处、科协、机械结构力学及控制国家重点实验室、航空宇航学院
报告人简介：
Zheng H. Zhu received his B.Eng,M.Eng and Ph.Ddegrees in mechanics from Shanghai Jiao Tong University located in Shanghai, China. 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.
From 1993 to 1995, he worked as a research associate in the Department of Mechanical and Industrial Engineering, University of Toronto. From 1995 to 2006, he was a senior engineer with the Curtiss-Wright � Indal Technologies located in Mississauga, Ontario, Canada. Since 2006, he has been a professor with the Department of Earth and Space Science and Engineering, York University in Toronto, Canada. He is the author of more than 170 articles. His research interests include dynamics and control of tetheredspace system andon-orbit service robot for space debris removal. He is the Editor-in-chief of the International Journal of Space Science and Engineering.
Dr. Zhu is the fellow of Engineering Institute of Canada, Associate fellow of AIAA,Fellow of CSME, senior member of IEEE, member of ASME, and licensed Professional engineer in Ontario, Canada. 报告内容简介：
This seminar will cover the mission concept study, mission objectives, nanosatellite design, hardware selection, and operation of an electrodynamic space tether mission. Electrodynamic space tethers (EDT) have the unique capabilities to acquire science data that would otherwise not be achievable and can provide cost-effective demonstrations of innovative concepts. From propellantless propulsion for orbit management, to power generation, to end-of-life de-orbiting of spacecraft, an electrodynamic tether provides several capabilities that are key to any satellite mission. The EDT technology takes advantage of two fundamental principles of electromagnetism: current is produced when a conductive wire moves through a magnetic field, and the field exerts a force on the current. The basic mission configuration involves two cubesatellites that will be connected at launch. The main cubesatellite will host the EDT, its deployment mechanics and communicate with the sub-cubesatellite for data transfer between two satellites. Following the commissioning phase, the cubesatellite will be deployed providing the initial velocity to unspool the tether. The resulting gravity gradient between the nanosatellite and cubesatellite will deploy the remainder of the 400-meter long EDT. The proposed mission is to perform a pioneering mission demonstrating deployment and stabilization of an EDT, current collection and satellite de-orbiting using EDT technology. The mission will employ heritage satellite design with minimal modification in order achieve a high level of fidelity, thereby minimizing potential risks. Furthermore, the tethered nanosatellite flying provide a cost-effective mean to acquire science data that would otherwise not be achievable. It will help radio scientists to improve the interpretation of convective motion of the F-region ionosphere at high latitudes.
航空宇航学院科研办
2016.04.18
网上教学 
