柔性绳系卫星释放过程的非线性冲击与控制

项目名称： 柔性绳系卫星释放过程的非线性冲击与控制

项目编号： No.11202094

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 余本嵩

作者单位： 南京航空航天大学

项目金额： 28万元

中文摘要： 作为人类认知太空的一种新型飞行器，绳系卫星在深空探测、空间科学等领域都具有重要的研究价值，已受到人们的广泛关注。本项目将关注于系绳柔性及绳索释放过程中星绳间的冲击效应，研究绳系卫星系统的非线性行为及控制方法。首先，计入系绳柔性，建立一个多自由度绳系卫星系统动力学模型，对释放过程中系绳构形变化及控制策略进行研究。然后，深入讨论主星刚体与柔性绳索间存在的摩擦，尤其是释放末时刻发生的非线性冲击，研究系统由此而可能产生的分岔、混沌等一系列非线性现象，同时，设计一套系绳释放张力控制律对主星耦合姿态进行控制。另外，通过设计一套星绳耦合动力学测试系统，对冲击作用下柔性系绳与主星刚体间的耦合位姿响应进行地面仿真实验研究。项目研究成果将对未来我国绳系卫星的在轨飞行实践有着重要的现实指导意义。

中文关键词： 绳系卫星；柔性系绳；非线性动力学；姿态控制；地面实验

英文摘要： Tethered satellites, satellites recently innovated for space probe, have become a prominent tool in scientific studies of space and outer space, which have already been focused on widely. The project will pay attention to tether's flexibility and impact of flexible tether on the mother satellite body during deployment, and study nonlinear dynamics and control of tethered satellite systems. First, taking tether's flexibility into account, a dynamical model with multi degrees-of-freedom for tethered satellite systems is established. Then, the configuration change and control strategies for the flexible tether during deployment are approached. Second, the friction between the mother satellite body and flexible tether, as well as nonlinear impact at the end of deployment, is researched deeply. It is noted that the friction and impact in the system is likely to yield a number of nonlinear phenomena, such as bifurcation and chaos. So, it is necessary to design a set of tension control law to relieve the influence of the tether deployment on the coupling attitude of the mother satellite body. Finally, with the help of a test system designed for coupling dynamics of satellite-tether, the influence of the impact on the coupling displacement and attitude of the flexible tether and mother satellite body is simulated on the

英文关键词： Tethered satellite；Flexible tether；Nonlinear dynamics；Attitude control；Ground-based experiment