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首页> 外文会议>International astronautical congress >EVALUATION OF A SIMPLE BARBER POLE BRAKING MECHANISM IN THE DEPLOYMENT OF BARE CONDUCTIVE TETHER FOR DEBRIS REMOVAL
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EVALUATION OF A SIMPLE BARBER POLE BRAKING MECHANISM IN THE DEPLOYMENT OF BARE CONDUCTIVE TETHER FOR DEBRIS REMOVAL

机译：去除渣的裸露导电胶部署中的简单理发杆制动机理的评价。

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The Japan Aerospace Exploration Agency (JAXA) has been investigating Electrodynamic Tether (EDT) systems for de-orbiting existing debris. EDT is a high-efficiency propulsion system to generate Lorentz force by the interaction with the Earth's magnetic field. It is necessary to deploy a tether several kilometers in length in order to obtain sufficient thrust for large debris removal. In the deployment phase, excess of deployment velocity and in-plane libration by gravity gradient become issues, since the behavior of the tether becomes unstable or it is severed by the tension over in excess of the load limit. In some previous flight experiments, a barber pole brake was adapted as a simple brake to acquire effective braking force. However, the barber pole brake was applied for tether deployment with a non-conductive tether and a light satellite up to some tens of kilograms. The purpose of this study is to build a simple barber pole brake using a net-type bare conductive tether and a relatively heavy satellite of about several hundred kilograms. First, a braking force model is built based on on-ground tests with a high-sensitive sensor. Next, numerical simulations about tether deployment dynamics on orbit are performed in order to investigate its applicable limitation. In the numerical simulations using the measured parameters from the on-ground tests, a 10-km-long tether is deployed, and the changes in the form of the tether and the tether oscillations are also calculated. The simulation confirmed that the barber pole brake can decrease the in-plane libration angle to less than ±10deg, and the maximum tension up to the half value of the tether load limit 160N.
机译：日本航空航天局（JAXA）一直在研究电动系链（EDT）系统，以使现有碎片轨道化。 EDT是一种高效的推进系统，可通过与地球磁场的相互作用产生洛伦兹力。必须部署一条长度为几公里的绳索，以便获得足够的推力以清除大量碎屑。在展开阶段，由于系绳的行为变得不稳定或由于超过负载极限的拉力而变得束缚，因此出现了多余的展开速度和重力梯度导致的平面内释放的问题。在以前的一些飞行实验中，将理发杆式刹车器改造为简单的刹车器，以获取有效的制动力。但是，理发杆式制动器用于非导电性系绳和轻卫星的系绳展开，重达几十公斤。这项研究的目的是使用网状裸露的导电绳和大约数百公斤的相对较重的卫星来构建一个简单的理发店杆式制动器。首先，基于具有高灵敏传感器的地面测试，建立了制动力模型。接下来，进行有关系绳在轨道上的动态部署的数值模拟，以研究其适用的局限性。在使用来自地面测试的测量参数进行的数值模拟中，部署了10公里长的系绳，并且还计算了系绳形式的变化和系绳的振动。仿真证实，理发杆制动器可以将平面内释放角减小到小于±10度，并且最大张力可以达到系绳负载极限160N的一半。

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