Modeling issues related to retrieval of flexible tethered satellite systems
Modeling issues related to retrieval of flexible tethered satellite systems
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DOI：
10.2514/3.21521
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发表时间：
1992-08
影响因子：
2.6
通讯作者：
Euisok Kim;S. Vadali
中科院分区：
文献类型：
--
作者：
Euisok Kim;S. Vadali
采用Galerkin方法和珠模型方法对绳系卫星系统的回收动力学进行了数值模拟，分别考虑了横向振动对应变的影响和不考虑横向振动对应变的影响。仿真结果表明，所有的方法产生显着不同的响应。据发现，没有横向应变贡献的Galerkin的方法不再现由于横向振动的纵向摆动运动，并没有显示出衰减的横向振动的系绳缩短。当包括横向贡献时，响应的收敛没有实现，并且随着模拟中使用的模式数量的增加，在检索期间呈现突然发散。使用珠模型的模拟显示纵向摆动运动以及跳绳运动在终端阶段的检索。此外，一个简单的方法获得非递归阶Af计算珠模型模拟。
The retrieval dynamics of the tethered satellite system is simulated using Galerkin's method with and without the contribution of the lateral vibration to the strain and the bead model approach in which the tether is assumed to be a series of point masses connected to each other by massless springs and revolute joints. Simulation results show that all the methods produce significantly different responses. It is found that Galerkin's method without the lateral strain contribution does not reproduce the longitudinal bobbing motion due to lateral vibrations and does not show attenuation of lateral vibrations as the tether shortens. When the lateral contribution is included, convergence of the response is not achieved and sudden divergence is exhibited during retrieval as the number of modes used in the simulation is increased. The simulations using the bead model show the longitudinal bobbing motion as well as the skip-rope motion during the terminal phases of retrieval. In addition, a simple method for obtaining nonrecursive order-Af computation for the bead model simulation is presented.