| 电推进在电磁编队飞行碰撞规避控制中的应用 |
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| 引用本文： | 白敬,王婷.电推进在电磁编队飞行碰撞规避控制中的应用[J].南京气象学院学报,2019,11(2):180-185. |
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| 作者姓名： | 白敬 王婷 |
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| 作者单位： | 东南大学 仪器科学与工程学院, 南京, 210096,东南大学 仪器科学与工程学院, 南京, 210096 |
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| 基金项目： | 国家自然科学基金（91648206）；江苏省重点研发计划（BE2018004-4） |
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| 摘 要： | 由于地球磁场的影响，电磁编队可以在近地轨道稳定飞行，通过改变电磁卫星磁极的电流大小来保持一定的编队队形.虽然地球磁场通常被看作偶极场，并随地球旋转，但地球磁场与电磁力场之间的相互作用被认为是一种内力.当电磁卫星编队突然遇到障碍物需要积极避障时，电磁力作为内力不能改变编队方向，因此，必须对电磁卫星编队施加外力，以实现碰撞规避控制.本文研究了电推进技术在电磁卫星编队碰撞规避中的应用.在此过程中，电推进提供编队转向所需的外部推力，而电磁力作为辅助推力共同作用实现碰撞规避.电推进采用多模态霍尔推力器，基于模糊推断的LQR重构控制方法进行碰撞规避过程的控制，并通过数字仿真验证了控制方法的有效性.
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| 关 键 词： | 电磁卫星编队 重构控制 电推进 碰撞规避 近地轨道 |
| 收稿时间： | 2019/2/25 0:00:00 |
Applying electric propulsion to collision avoidance process in electromagnetic formation flight |
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| BAI Jing and WANG Ting.Applying electric propulsion to collision avoidance process in electromagnetic formation flight[J].Journal of Nanjing Institute of Meteorology,2019,11(2):180-185. |
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| Authors: | BAI Jing and WANG Ting |
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| Institution: | School of Instrument Science and Engineering, Southeast University, Nanjing 210096 and School of Instrument Science and Engineering, Southeast University, Nanjing 210096 |
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| Abstract: | Electromagnetic formation flights(EMFFs) can be stabilized in low Earth orbit owing to the influence of Earth''s magnetic field.Formation control is realized by changing the current magnitude of the magnetic pole of the EMFF.Although Earth''s magnetic field is generally considered to be a dipole and rotates with Earth,the interaction between the magnetic fields of Earth and the EMFF is considered to be an internal force.When a small magnetic satellite formation encounters an obstacle that must be avoided,the current magnetic force,which acts as an internal force,cannot promote directional changes.Therefore,it is necessary to exert external forces on the EMFF to gain control.As a continuation of the application of electric propulsion (EP) to Coulomb satellite formation,this study investigates how EP may be applied to collision avoidance by EMFFs.During the process,the external thrust of the EMFF was provided by EP,which served as supplementary propulsion to realize obstacle avoidance.EP adopted multimode Hall thrusters,and a linear formation was employed by the EMFF.Using the linear quadratic regulator control method with an added fuzzy reference system,EMFF achieved collision avoidance with numerical simulation. |
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| Keywords: | electromagnetic formation flights reconfiguration control electric propulsion collision avoidance low Earth orbit |
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