Dynamics and control of a set of space systems

拟议的研究计划包括一系列涉及一套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。其中许多项目与空间活动直接相关，但也有一些是出于好奇心。具体而言，将开展以下项目。(i)空间碎片的增加是空间使命运营者的一个主要关切。据估计，空间低地球轨道上约有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）由操纵器协助主动清除空间碎片，和（ii）使用电动系绳。将研究与这两种方法相关的各种动力学和控制问题。(ii)人们对小行星飞行任务的兴趣越来越大。为了使使命取得成功，必须充分了解航天器在小行星附近的动力学行为。拟议的项目涉及航天器在数量相当多的双星小行星附近的动力学特殊情况。由于小行星引力场的非均匀性和时变性，航天器动力学可能是非常有趣和非常规的。这将被调查。(iii)太空电梯有望成为太空运输的低成本替代品。与太空电梯的部署相关的动力学将被检查。拟议的项目还将研究与部分空间电梯有关的动力学和控制问题。(iv)将继续研究受内流/环流作用的壳体的非线性动力学。

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.