大气环境下的电动力绳索的动力学分析  

The dynamic analysis of electro-dynamic tether under atmospheric environment

作　　者：周迎春[1] 孙启国[1] 

机构地区：[1]北方工业大学机电工程学院,北京100144

出　　处：《机械设计与制造》2012年第4期198-200,共3页Machinery Design & Manufacture

基　　金：中英高校科研合作项目(CHINA-UKSCIENCENETWORKS)

摘　　要：利用拉格朗日方法,建立了运行在赤道平面内的考虑质量的电动力绳索在大气阻力摄动作用下的二维模型。通过仿真分别从系统所受外力和系统平衡点两方面分析大气阻力对动力学系统轨道保持阶段的影响。前者分析结果表明,电磁力的存在会增大绳索的摆动幅度,而大气阻力的存在会使原本自平衡的系统失稳。后者结果显示,计入大气阻力后,系统在无外力情况下的平衡点消失,且系统中产生的电流远大于无外力时的情况。结果表明,大气阻力使电动力绳系系统稳定性变差。Lagrange＇s method is employed to build a two-dimensional model of the electro-dynamic tether running in the equatorial plane under the atmospheric drag with mass being taken into account.Then the impact of atmospheric drag on retention phase of dynamics track is analyzed respectively from external force to equilibrium point of the system through simulation,which results from former analysis indicate that the presence of electromagnetic force will increase the swing amplitude of tether,while the atmospheric drag will make the original self-balance system unstable.The latter results show that the equilibrium point of the system without external forces is disappeared with the atmospheric drag being taken into account,and the current generated in the system is much larger than that without external force.The results indicate that the atmospheric drag can make the stability of the electro-dynamic tether get worse.

关 键 词：电动力绳索 大气阻力 稳定性 

分 类 号：TH16[机械工程—机械制造及自动化]