Design and research of magnetically levitated testbed with composite superconductor bearing for micro thrust measurement  

作　　者：Fawzi Derkaoui Zhaoxin Liu Wenjiang Yang Yu Qin Kunlong Wu Peng Zhao Juzhuang Yan Junxue Ren Haibin Tang Fawzi DERKAOUI;刘朝鑫;杨文将;秦瑀;吴坤隆;赵鹏;闫炬壮;任军学;汤海滨(School of Astronautics,Beihang University,Beijing 100191,People's Republic of China;School of Power Engineering,Liuzhou Railway Vocational Technical College,Liuzhou 545616,People's Republic of China;School of Space and Environment,Beihang University,Beijing 100191,People's Republic of China)

机构地区：[1]School of Astronautics,Beihang University,Beijing 100191,People's Republic of China [2]School of Power Engineering,Liuzhou Railway Vocational Technical College,Liuzhou 545616,People's Republic of China [3]School of Space and Environment,Beihang University,Beijing 100191,People's Republic of China

出　　处：《Plasma Science and Technology》2021年第10期92-101,共10页等离子体科学和技术（英文版）

摘　　要：A high temperature superconducting(HTS)magnetically levitated testbed has been developed for the steady thrust measurement of miniature ion electrospray thruster.The structure of the testbed mainly consists of an HTS composite bearing,a magnetic shielding plate,an active electromagnetic brake and a laser displacement sensor.The steady thrust is described as a function of the equilibrium angle displacement of the floating frame.Furthermore,the mechanical behaviors of HTS composite bearing were studied via finite element simulation and experiments,which include the load capacity,levitation stiffness and background noise.The results show that the thrust testbed can keep in low noise and have a load capacity up to 4 kg.According to the ignition testing of the electrospray thruster,the thrust force of 25.2 m N was measured by the testbed,which is close to the design value of miniature ion electrospray thruster.

关 键 词：micro-force measurement maglev testbed composite HTS bearing 

分 类 号：V463[航空宇航科学与技术—航空宇航制造工程]