Dynamics and control of a set of space systems

拟议的研究方案包括一组涉及一组空间系统的动力学和控制的项目，以及一个结构动力学项目。这些项目中有许多与太空行动直接相关，但也有一些是出于好奇心。具体而言，将开展以下项目。 (1)空间碎片的增加是空间飞行任务运营者的主要关切。据估计，在近地轨道上，空间中大约有14,000个大小超过10厘米的物体。为了卫星运行的安全，必须清除这些空间碎片。拟议的研究方案将审查两种方法：(A)机械手辅助的主动清除空间碎片，以及(Ii)使用电动系绳。与这两种方法相关的各种动力学和控制问题将被调查。 (2)人们对小行星飞行越来越感兴趣。为了成功执行任务，必须很好地了解小行星附近航天器的动力学行为。拟议的项目涉及双星小行星附近航天器动力学的特殊情况，双星小行星数量相当多。由于小行星引力场的不均匀和时变，航天器的动力学很可能非常有趣和非常规。这件事将得到调查。 (3)空间电梯有望成为空间运输的一种低成本替代方案。将研究与空间电梯部署相关的动力学问题。拟议的项目还将研究与部分空间电梯相关的动力学和控制问题。 (4)将继续研究壳体在内部/环空流动作用下的非线性动力学。

The proposed research program consists of a set of projects dealing with the dynamics and control of a set of space systems, and a structural dynamics project. Many of these projects are directly related to space operations, but some are curiosity-driven. Specifically, the following projects will be undertaken. (i) Increase in space debris is a major concern for space mission operators. It is estimated that there are approximately 14,000 objects in space over the size of 10 cm in low earth orbits. This space debris must be removed for the safety of operating satellites. The proposed research program will examine two methods: (a) manipulator-assisted active removal of space debris, and (ii) use of an electrodynamic tether. Various dynamics and control issues associated with these two methods will be investigated. (ii) There is a growing interest in missions to asteroids. To have a successful mission, the dynamical behaviour of a spacecraft in the vicinity of an asteroid must be well-understood. The proposed project deals with the special case of dynamics of a spacecraft in the vicinity of binary asteroids, which are fairly numerous. Because of the non-uniform and time-varying gravitational field of asteroids, the spacecraft dynamics is likely to be very interesting and unconventional. This will be investigated. (iii) The space elevator is expected to become a low-cost alternative for space transportation. Dynamics associated with the deployment of the space elevator will be examined. The proposed project will also examine the dynamics and control issues associated with a partial space elevator. (iv) Study of nonlinear dynamics of shells subjected to internal / annular flows will be continued.