International Conference on Recent Advances in Space Technologies, 2003. RAST '03. Proceedings of最新文献_第3页

The Bering mission space segment 白令任务的空间部分

International Conference on Recent Advances in Space Technologies, 2003. RAST '03. Proceedings of Pub Date : 1900-01-01 DOI: 10.1109/RAST.2003.1303916

P. L. Thomsen, F. Hansen

{"title":"The Bering mission space segment","authors":"P. L. Thomsen, F. Hansen","doi":"10.1109/RAST.2003.1303916","DOIUrl":"https://doi.org/10.1109/RAST.2003.1303916","url":null,"abstract":"This paper describes the space segment of the proposed Bering Mission. The proposed mission shall autonomously discover near Earth objects (NEOs) and asteroids and determine their orbital parameters, light curve, surface characteristics and internal properties, mass, albedo, and acquire high quality images and magnetic properties. The mission proposed, will generate flux, size and orbital distributions of NEOs down to 2-20 m diameter, over most of the inner solar system. The mission proposed here, comprises two spacecraft flying in a loose formation for 7+ years in an elliptical orbit between /spl sim/0.7 AU (/spl sim/Venus orbit) and /spl sim/3.5 AU. A powerful suite of instruments is proposed. Each satellite has an Advanced Stellar Compass (ASC) system with 7 camera heads, a folding mirror based 0.3 m multi-spectral telescope imager, a boom-mounted magnetometer and a laser ranger. Bering is proposed as a slow spinner, which necessitates a rotationally symmetric body and the boom coincident with the axis of rotation. Other configurations are also under discussion, and the configuration presented in this paper only comprises initial ideas and discussions, which indeed need further analysis and design.","PeriodicalId":272869,"journal":{"name":"International Conference on Recent Advances in Space Technologies, 2003. RAST '03. Proceedings of","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129509912","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

A benefit of the regional cooperation in space science and technology 空间科学和技术区域合作的好处

International Conference on Recent Advances in Space Technologies, 2003. RAST '03. Proceedings of Pub Date : 1900-01-01 DOI: 10.1109/RAST.2003.1303970

R. Rustamov

引用次数: 0

Development of KOMPSAT-2 spacecraft simulator 研制KOMPSAT-2航天器模拟器

International Conference on Recent Advances in Space Technologies, 2003. RAST '03. Proceedings of Pub Date : 1900-01-01 DOI: 10.1109/RAST.2003.1303933

S. Cho, S. Lee, J. Kim, S. Lee

引用次数: 1

Plasma induced erosion phenomena in a Hall thruster 霍尔推力器中等离子体诱导腐蚀现象

International Conference on Recent Advances in Space Technologies, 2003. RAST '03. Proceedings of Pub Date : 1900-01-01 DOI: 10.1109/RAST.2003.1303393

S. Mazouffre, F. Dubois, L. Albarede, D. Pagnon, M. Touzeau, M. Dudeck

{"title":"Plasma induced erosion phenomena in a Hall thruster","authors":"S. Mazouffre, F. Dubois, L. Albarede, D. Pagnon, M. Touzeau, M. Dudeck","doi":"10.1109/RAST.2003.1303393","DOIUrl":"https://doi.org/10.1109/RAST.2003.1303393","url":null,"abstract":"Specific features of Hall thrusters, which are advanced electric propulsion devices for space applications, in terms of thrust, specific impulse, efficiency and lifetime make them suitable candidates for missions like geo-stationary satellite orbit correction and station keeping. A large research program devoted to the investigation of physical processes connected to the working of Hall thrusters has been carried out in France for many years. One of the current research topic concerns the erosion phenomena induced by the created plasma. Indeed, erosion of the ceramic insulators of a Hall thruster is always considered as a critical point as the main limiting factor for the thruster lifetime. It is clear that a better understanding as well as a better monitoring of wear processes of the insulators is necessary in order to employ Hall thrusters for long term missions like interplanetary journeys. By comparing experiments and numerical outcomes, it appears that present models describing erosion mechanisms, solely based on ion bombardment, do not explain the overall losses of insulator material and the periodic pattern observed at the channel outlet. The peculiar wear of the insulators could find its origin in the so-called \"anomalous erosion\" phenomenon. It is most likely that electrons play a major role in such an erosion process, however, the way they act and the deep reason for the formation of a network of longitudinal streaks are still to be clarified. In terms of erosion monitoring, to observe the light emitted by atoms sputtered from insulators appears to be a promising way of real-time controlling the wear of the ceramic walls.","PeriodicalId":272869,"journal":{"name":"International Conference on Recent Advances in Space Technologies, 2003. RAST '03. Proceedings of","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125448548","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 10

An X-band transmitter for satellite communication 用于卫星通信的x波段发射机

International Conference on Recent Advances in Space Technologies, 2003. RAST '03. Proceedings of Pub Date : 1900-01-01 DOI: 10.1109/RAST.2003.1303957

O. Sen, H. Sunay, C. Dudak

引用次数: 4

Space engineering spacecraft (MUSES) program in ISAS featuring its latest mission "Hayabusa" ISAS的空间工程航天器(MUSES)计划以其最新任务“隼鸟”为特色

International Conference on Recent Advances in Space Technologies, 2003. RAST '03. Proceedings of Pub Date : 1900-01-01 DOI: 10.1109/RAST.2003.1303961

K. Uesugi

引用次数: 12

Small satellites constellation for monitoring of natural and man-made disasters 用于监测自然和人为灾害的小卫星星座

International Conference on Recent Advances in Space Technologies, 2003. RAST '03. Proceedings of Pub Date : 1900-01-01 DOI: 10.1109/RAST.2003.1303967

K. Boyarchuk, V. Dokukin, V. Oraevsky, R. Salikhov, A. V. Vladimirov, N.A. Sennik, V. A. Danilkin, A. V. Sleta

引用次数: 3

Low friction rotating technique of spacing docking test bed 空间对接试验台低摩擦旋转技术

International Conference on Recent Advances in Space Technologies, 2003. RAST '03. Proceedings of Pub Date : 1900-01-01 DOI: 10.1109/RAST.2003.1303976

Zhang Chong-jun, Lai Yinan, Zhang Guangyu, Zhao Xuezeng

{"title":"Low friction rotating technique of spacing docking test bed","authors":"Zhang Chong-jun, Lai Yinan, Zhang Guangyu, Zhao Xuezeng","doi":"10.1109/RAST.2003.1303976","DOIUrl":"https://doi.org/10.1109/RAST.2003.1303976","url":null,"abstract":"Discusses a two-axis rotating technique using two 5-degrees of freedom (DOF) ground-based docking test beds developed to simulate the dynamics of spacecraft. The friction torque of each DOF should be as small as possible in order to simulate the dynamic characteristics of spacecraft under gravity. Since the mass of the two 5-DOF test beds are 2 tons and 8 tons, a new low fiction and bending resistant structure in pitching and rolling simulation has been designed. The main \"bending resistant part\" is optimized by an improved fuzzy finite element method. According to the target mass and inertia of the system and deformation, the finite element method with fuzzy constraints is used to optimize the structure of the test bed. The optimization result is remarkable and the mass is obviously reduced. The simulating equipment is designed to verify the relevant parameters according to the dynamic similar theory. Tests show that the maximal bearing friction torque of the passive space docking test bed is 1.97 N m which is small in relation to the 80 N m torque produced by spacecraft in space with the biggest error of 9.3 percent.","PeriodicalId":272869,"journal":{"name":"International Conference on Recent Advances in Space Technologies, 2003. RAST '03. Proceedings of","volume":"183 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132548986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Metallic TPS solutions for increased heat loads 用于增加热负荷的金属TPS解决方案

International Conference on Recent Advances in Space Technologies, 2003. RAST '03. Proceedings of Pub Date : 1900-01-01 DOI: 10.1109/RAST.2003.1303977

J. Buursink, T.J. van Baten, K. Sudmeijer

{"title":"Metallic TPS solutions for increased heat loads","authors":"J. Buursink, T.J. van Baten, K. Sudmeijer","doi":"10.1109/RAST.2003.1303977","DOIUrl":"https://doi.org/10.1109/RAST.2003.1303977","url":null,"abstract":"For future reusable launch vehicles, the thermal protection system (TPS) has to be both durable and easy to maintain, apart from the basic function of providing thermal protection at low mass. Metallic materials offer the promise of improved durability and reduced maintenance effort, but have a limited application range with respect the thermal loading. In order to improve the applicability of metallic TPS materials, two concepts of cooling metallic hot structures have been developed at the Faculty of Aerospace Engineering of Delft University of Technology. The first concept is called Improved Radiation Cooling and is based on the principle of providing a cool interior background for the hot outer skin to radiate to, thereby increasing the radiation cooling effect. The cool inner background is made up of a porous material saturated with water, ensuring a temperature no higher than the boiling temperature of water. This system was tested in laboratory experiments and shows an increase of allowable heat flux for the PM1000 metallic skin from some 250 to almost 500 kW/m/sup 2/. A flight experiment is planned on ESA's Expert re-entry module. For higher heat loads, a direct water cooling system is proposed for the nose of a small re-entry module. Here water is in direct contact with the outer skin of the vehicle, is held in place by deceleration forces, and cools the skin by evaporating. The vapour is vented through the base of the vehicle. This system cools the outer skin to a very low temperature of about 250/spl deg/C, and requires some 8 kg of water for a ballistic re-entry of the baseline DART vehicle of Delft University. The limit of allowable heat flux for this system depends on pressure inside the water tank and deceleration forces.","PeriodicalId":272869,"journal":{"name":"International Conference on Recent Advances in Space Technologies, 2003. RAST '03. Proceedings of","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130377689","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

A new technology in production of aerospace components: powder injection molding (PIM) 航空航天零部件生产的新技术:粉末注射成型(PIM)

International Conference on Recent Advances in Space Technologies, 2003. RAST '03. Proceedings of Pub Date : 1900-01-01 DOI: 10.1109/RAST.2003.1303979

O. Gulsoy, O. Vayvay, S. Salman

引用次数: 1