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Realization and preliminary tests on an innovative deployable structure for a high resolution telescope for microsatellite

机译：用于微卫星高分辨率望远镜的创新型可部署结构的实现和初步测试

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High resolution images of the Earth surface in the visible wavelength are useful in a variety of human activities, from agriculture, to urban area monitoring, but the utilization is often limited by the high cost of the images and the relatively small number of satellites equipped with high resolution telescopes. In order to encourage the utilization of high resolution images, Italian Space Agency (ASI) funded a project aimed to investigate the possibility of utilization of microsatellites for this task. The objective of the project MITAR (MIcro Telescope, high Resolution) is to realize a prototypal telescope, capable of a 1m resolution from 400Km altitude, compatible with a microsatellite platform. The necessity of a compact, lightweight and highly performing payload has been achieved designing a Cassegrain configuration with composite material mirrors and an innovative deployable structure. The feasibility analysis and preliminary design have been presented at the SPIE Remote Sensing Europe 2003 congress in the paper titled "High resolution deployable telescope for satellite application''. Present paper focuses on the activities developed by Second University of Naples. In the university it has been designed a structure capable of a smooth deploy, without active control systems. The structure is deployed by lenticular tape springs (LTS). damped with viscoelastic polymer. In the paper it is quickly described the optical system, then the peculiarity of the lenticular tape springs are shortly described. The characterization of the visco-elastically damped LTS (VEDLTS), and the description of the efforts aimed to have numerical and analytical instruments for the prediction of this innovative elements are exposed with more details. We report then some relevant detail of the deployable structure and the realization related aspects. The paper is concluded with the results of the very preliminary tests, aimed to verify the ability of the structure of performing a correct deploy and the accuracy of the deployed configuration. The tests have evidenced that the structure does not easily deploy spontaneously, then it has been necessary to use some conventional springs in order to trigger a correct deploy, obtaining a structure with the needed characteristics.
机译：在可见波长范围内的高分辨率地球表面图像可用于从农业到城市监测的各种人类活动中，但其使用通常受到图像成本高和配备卫星数量相对较少的限制。高分辨率望远镜。为了鼓励利用高分辨率图像，意大利航天局（ASI）资助了一个项目，该项目旨在调查利用微卫星来完成这项任务的可能性。 MITAR（MIcro望远镜，高分辨率）项目的目标是实现一种原型望远镜，该望远镜能够在400Km的高度上实现1m的分辨率，并与微卫星平台兼容。设计具有复合材料镜和创新的可展开结构的卡塞格林配置时，已经实现了紧凑，轻便和高性能的有效载荷的必要性。在2003年SPIE遥感欧洲大会上，题为“用于卫星应用的高分辨率可部署望远镜”的论文已经进行了可行性分析和初步设计，该论文的重点是那不勒斯第二大学开展的活动。设计了一种结构平稳，无需主动控制系统的结构，该结构由双凸透镜带状弹簧（LTS）展开，并通过粘弹性聚合物阻尼，在本文中快速描述了光学系统，然后介绍了双凸透镜带的特殊性弹簧的简短描述，粘弹性阻尼LTS（VEDLTS）的表征，以及旨在使用数值和分析仪器来预测这种创新元素的努力的描述，将会更加详细地介绍，然后我们报告一些相关的细节。的可部署结构及其实现相关方面的内容。非常初步的测试，旨在验证执行正确部署的结构的能力以及已部署配置的准确性。测试证明，该结构不容易自发展开，因此必须使用一些常规弹簧才能触发正确展开，从而获得具有所需特性的结构。

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