TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN最新文献

Allowable Initial Relative Velocity of a Net to Contact and Capture Space Debris 网接触和捕获空间碎片的允许初始相对速度

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN Pub Date : 2023-01-01 DOI: 10.2322/tastj.21.45

Andry Renaldy PANDIE, Hirohisa KOJIMA

{"title":"Allowable Initial Relative Velocity of a Net to Contact and Capture Space Debris","authors":"Andry Renaldy PANDIE, Hirohisa KOJIMA","doi":"10.2322/tastj.21.45","DOIUrl":"https://doi.org/10.2322/tastj.21.45","url":null,"abstract":"The escalating presence of space debris is becoming increasingly problematic due to the ensuing potential of damage to active spacecraft if a collision were to occur. The tether net has emerged as a possible solution for the capture of such debris. Although extensive studies have been conducted on the net's performance, the influence of initial debris velocity and net ejection on the tether net's interaction with and capture of debris has not been confirmed. The primary aim of this study is to investigate the net's behavior when it interacts with space debris moving at a range of velocities. The objective is to ascertain the permissible initial relative speed of the net necessary to facilitate successful contact and subsequent capture of the debris. This determination takes into account the initial velocities of both the ejection of the net and the debris. The results reveal that successful interaction between the net and the debris is influenced by several variables. These include the initial velocity of the debris relative to the net ejection system, the furthest distance from the net to the ejection system when the net commences contraction, the speed at which the net is ejected, and the direction of debris motion.","PeriodicalId":120185,"journal":{"name":"TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135561375","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

A Smoothed Eclipse Model for Solar Electric Propulsion Trajectory Optimization 一种用于太阳能电力推进轨迹优化的光滑日食模型

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN Pub Date : 2019-07-11 DOI: 10.2322/TASTJ.17.181

Jonathan D. Aziz, D. Scheeres, Jeffrey Stuart Parker, J. Englander

引用次数: 18

Application of Machine Learning to the Particle Identification of GAPS 机器学习在间隙粒子识别中的应用

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN Pub Date : 2019-04-28 DOI: 10.2322/tastj.18.44

T. Wada, H. Fuke, Y. Shimizu, T. Yoshida

引用次数: 2

Observer-Based Disturbance Estimation for a Spacecraft Inertial Pointing Using Magnetic Torquers 基于观测器的航天器惯性指向磁力矩干扰估计

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN Pub Date : 2019-01-31 DOI: 10.2322/TASTJ.17.447

Jongbum Kim, H. Bang

引用次数: 1

Investigation into Star Tracker Algorithms using Smartphones with Application to High-Precision Pointing CubeSats 基于智能手机的星跟踪器算法及其在高精度指向立方体卫星上的应用研究

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN Pub Date : 2019-01-31 DOI: 10.2322/TASTJ.17.327

Joshua J. R. Critchley-Marrows, Xiaofeng Wu

引用次数: 3

Computational Study on Finned Reusable Rocket Aerodynamics during Turnover 翅片可重复使用火箭周转过程空气动力学计算研究

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN Pub Date : 2019-01-31 DOI: 10.2322/TASTJ.17.104

Takuya Aogaki, K. Kitamura, S. Nonaka

{"title":"Computational Study on Finned Reusable Rocket Aerodynamics during Turnover","authors":"Takuya Aogaki, K. Kitamura, S. Nonaka","doi":"10.2322/TASTJ.17.104","DOIUrl":"https://doi.org/10.2322/TASTJ.17.104","url":null,"abstract":"The development of a fully reusable vertical-takeoff-and-vertical-landing (VTVL) rocket is indispensable for reducing space transportation costs. However, there are many technical issues associated with such vehicles, such as turnover maneuvers during return flight where the pitching moment plays a key role. It is known that aerodynamic characteristics can be controlled by installing aerodynamic devices, but the relationship between the aerodynamic characteristics and the flowfields has not been explored. To clarify this relationship using computational fluid dynamics (CFD), we investigated these flowfields and aerodynamic characteristics, in the case where we install such devices (fins) in the nose part of a reusable rocket. We found that vortices form downstream of the aerodynamic devices. For angles of attack between 0 and 90 degrees (in which the fins are located in the upstream portion), these vortices significantly affect the surface pressure on the rocket and increase the pitching moment. On the other hand, for AOAs between 90 to 180 degrees (in which the fins are in the downstream portion), the effect of these vortices on the on-surface pressure is negligible, and only vortices formed near the surface of the fins increase the pitching moment.","PeriodicalId":120185,"journal":{"name":"TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131806985","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

Roll Moment Characteristics of Supersonic Flight Vehicle Equipped with Asymmetric Protuberance 非对称凸起超声速飞行器的滚转力矩特性

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN Pub Date : 2019-01-31 DOI: 10.2322/TASTJ.17.111

T. Harada, K. Kitamura, S. Nonaka

引用次数: 0

Numerical Analysis on Reusable Rocket Aerodynamics with Reduced-Yaw-Force Configurations 减偏航力配置下可重复使用火箭空气动力学数值分析

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN Pub Date : 2019-01-31 DOI: 10.2322/TASTJ.17.439

Ayano Inatomi, K. Kitamura, S. Nonaka

{"title":"Numerical Analysis on Reusable Rocket Aerodynamics with Reduced-Yaw-Force Configurations","authors":"Ayano Inatomi, K. Kitamura, S. Nonaka","doi":"10.2322/TASTJ.17.439","DOIUrl":"https://doi.org/10.2322/TASTJ.17.439","url":null,"abstract":"It is known that aerodynamic characteristics of a slender body vary substantially at high angles-of-attack (AoAs), and then, will have strong impacts on its flight. For, example, the yaw force makes flight unstable. In this study, we investigated the relation between the yaw force and the configuration, and details of flowfield around the slender-bodied-vehicle numerically. The configuration consisting of “nose cone” and “square aftbody” parts was employed as the baseline, and then, compared with other three configurations having different fineness ratios. According to our computed results, in the case of 50 degrees of AoA, the longer the model became, the more asymmetry appeared: yaw force and asymmetry were found to be attributed not only to the length of the body, but also to the nose bluntness. On the contrary, in the case of 140 degrees, the shorter the model became, the more asymmetry appeared. Furthermore, the large nose bluntness increased CY. Interestingly, this trend is totally opposite to that observed at 50 degrees. It had been considered that the large nose bluntness and the small fineness ratio can reduce asymmetry and CY, however, this study showed that it is not true in the case over 90 degrees, due to complex wake flow structure discovered in the present numerical simulations.","PeriodicalId":120185,"journal":{"name":"TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2019-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117256897","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: 2

Science Objectives of the Ganymede Laser Altimeter (GALA) for the JUICE Mission JUICE任务中木卫三激光高度计(GALA)的科学目标

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN Pub Date : 2018-03-05 DOI: 10.2322/TASTJ.17.234

J. Kimura, H. Hussmann, S. Kamata, Koji Matsumoto, J. Oberst, Gregor Steinbrugge, A. Stark, K. Gwinner, S. Oshigami, N. Namiki, K. Lingenauber, K. Enya, K. Kuramoto, S. Sasaki

{"title":"Science Objectives of the Ganymede Laser Altimeter (GALA) for the JUICE Mission","authors":"J. Kimura, H. Hussmann, S. Kamata, Koji Matsumoto, J. Oberst, Gregor Steinbrugge, A. Stark, K. Gwinner, S. Oshigami, N. Namiki, K. Lingenauber, K. Enya, K. Kuramoto, S. Sasaki","doi":"10.2322/TASTJ.17.234","DOIUrl":"https://doi.org/10.2322/TASTJ.17.234","url":null,"abstract":"Laser altimetry is a powerful tool for addressing the major objectives of planetary physics and geodesy, and have been applied in planetary explorations of the Moon, Mars, Mercury, and the asteroids Eros, and Itokawa. The JUpiter Icy Moons Explorer (JUICE), led by European Space Agency (ESA), has started development to explore the emergence of habitable worlds around gas giants. The Ganymede Laser Altimeter (GALA) will be the first laser altimeter for icy bodies, and will measure the shape and topography of the large icy moons of Jupiter, (globally for Ganymede, and using flyby ground-tracks for Europa and Callisto). Such information is crucial for understanding the formation of surface features and can tremendously improve our understanding of the icy tectonics. In addition, the GALA will infer the presence or absence of a subsurface ocean by measuring the tidal and rotational responses. Furthermore, it also improves the accuracy of gravity field measurements reflecting the interior structure, collaborating with the radio science experiment. In addition to range measurements, the signal strength and the waveform of the laser pulses reflected from the moon's surface contain information about surface reflectance at the laser wavelength and small scale roughness. Therefore we can infer the degrees of chemical and physical alterations, e.g., erosion, space weathering, compaction and deposition of exogenous materials, through GALA measurements without being affected by illumination conditions. JUICE spacecraft carries ten science payloads including GALA. They work closely together in a synergistic way with GALA being one of the key instruments for understanding the evolution of the icy satellites Ganymede, Europa, and Callisto.","PeriodicalId":120185,"journal":{"name":"TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2018-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134548161","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: 9

Performance Model Simulation of Ganymede Laser Altimeter (GALA) for the JUICE Mission JUICE任务Ganymede激光高度计(GALA)性能模型仿真

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN Pub Date : 2016-03-10 DOI: 10.2322/TASTJ.17.150

H. Araki, K. Ishibashi, N. Namiki, H. Noda, Masanori Kobayashi, K. Enya, M. Ozaki, T. Mizuno, Yoshifumi Saito, K. Touhara, S. Oshigami, S. Kashima, J. Kimura, S. Kobayashi, G. Steinbruegge, A. Stark, C. Althaus, S. Togno, K. Lingenauber, H. Hussmann

引用次数: 3