M. Kawazu, N. Yamamoto, Masatoshi Chono, Hirotaka Fuchigami, T. Morita
{"title":"Prediction of Thruster Performance in Hall Thrusters Using Neural Network with Auto Encoder","authors":"M. Kawazu, N. Yamamoto, Masatoshi Chono, Hirotaka Fuchigami, T. Morita","doi":"10.2322/tastj.19.760","DOIUrl":"https://doi.org/10.2322/tastj.19.760","url":null,"abstract":"","PeriodicalId":120185,"journal":{"name":"TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN","volume":"81 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":"133468821","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}
I. Funaki, Shinatora Cho, Tadahiko Sano, Tsutomu Fukatsu, Yosuke Tashiro, Taizo Shiiki, Y. Nakamura, Hiroki Watanabe, K. Kubota, Yoshiki Matsunaga, K. Fuchigami
{"title":"1,000-hours Demonstration of a 6-kW-class Hall Thruster for All-Electric Propulsion Satellite","authors":"I. Funaki, Shinatora Cho, Tadahiko Sano, Tsutomu Fukatsu, Yosuke Tashiro, Taizo Shiiki, Y. Nakamura, Hiroki Watanabe, K. Kubota, Yoshiki Matsunaga, K. Fuchigami","doi":"10.2322/TASTJ.17.589","DOIUrl":"https://doi.org/10.2322/TASTJ.17.589","url":null,"abstract":"","PeriodicalId":120185,"journal":{"name":"TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN","volume":"15 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":"131910664","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}
On-board Orbit Determination (OD) using directions of celestial bodies, planets and asteroids, in the Solar System for the Autonomous Navigation (AutoNav) is introduced in this paper. For deep space missions, OD has been performed by Range and RangeRate (RARR), which is the traditional ground tracking approach by radio wave. RARR enables the higher accuracy of OD than other methods. However, such radio navigation has the inevitable problems, e.g. the reduction of radio wave strength and the transmitter limitation. Furthermore, people must stay and operate the spacecraft on the ground station, which makes the operating cost and burden considerable. Therefore, there has been a growing interest in the autonomy of the spacecraft in recent years to avoid the above-mentioned problems. This paper considers on-board OD using directions of celestial bodies from spacecraft. In particular, the selection of observation targets is focused on because it’s important that the selection of observation targets leads to the satisfaction of mission requirements or increment of science observation. Then, this paper presents the method for the target selection, which is computationally cheap and makes the target selection easy.
介绍了利用太阳系天体、行星和小行星的方向进行自主导航的星载轨道确定方法。对于深空任务，传统的无线电波地面跟踪方法是Range and RangeRate (RARR)。RARR测量的外径精度高于其他方法。然而，这种无线电导航存在着不可避免的问题，如无线电波强度的降低和发射机的限制。此外，人们必须在地面站停留和操作航天器，这使得运行成本和负担相当大。因此，近年来人们对航天器的自主性越来越感兴趣，以避免上述问题。本文利用航天器上天体的方向来考虑星载OD。特别是观测目标的选择，对于满足任务要求或增加科学观测量至关重要。然后，本文提出了目标选择方法，该方法计算量小，使目标选择容易。
{"title":"Simplified Covariance Estimation and Target Observation Management Method for On-Board Optical Navigation of Deep Space Probe","authors":"Yosuke Kawabata, T. Saiki, Y. Kawakatsu","doi":"10.2322/TASTJ.17.538","DOIUrl":"https://doi.org/10.2322/TASTJ.17.538","url":null,"abstract":"On-board Orbit Determination (OD) using directions of celestial bodies, planets and asteroids, in the Solar System for the Autonomous Navigation (AutoNav) is introduced in this paper. For deep space missions, OD has been performed by Range and RangeRate (RARR), which is the traditional ground tracking approach by radio wave. RARR enables the higher accuracy of OD than other methods. However, such radio navigation has the inevitable problems, e.g. the reduction of radio wave strength and the transmitter limitation. Furthermore, people must stay and operate the spacecraft on the ground station, which makes the operating cost and burden considerable. Therefore, there has been a growing interest in the autonomy of the spacecraft in recent years to avoid the above-mentioned problems. This paper considers on-board OD using directions of celestial bodies from spacecraft. In particular, the selection of observation targets is focused on because it’s important that the selection of observation targets leads to the satisfaction of mission requirements or increment of science observation. Then, this paper presents the method for the target selection, which is computationally cheap and makes the target selection easy.","PeriodicalId":120185,"journal":{"name":"TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN","volume":"876 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":"132224969","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}
{"title":"Experimental Study on Unsteadiness of n-decane Single Droplet Evaporation and Effect of Natural Convection on Droplet Evaporation at High Pressures and Temperatures","authors":"Yosuke Murakami, H. Nomura, Y. Suganuma","doi":"10.2322/tastj.19.647","DOIUrl":"https://doi.org/10.2322/tastj.19.647","url":null,"abstract":"","PeriodicalId":120185,"journal":{"name":"TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN","volume":"1 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":"133974471","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}
Yusei Sasaki, Tomohiro Ishizuka, M. Bando, S. Hokamoto
{"title":"Two-Input-Torque for Hopping Exploration Robot to Enhance Reachability under Microgravity","authors":"Yusei Sasaki, Tomohiro Ishizuka, M. Bando, S. Hokamoto","doi":"10.2322/tastj.19.719","DOIUrl":"https://doi.org/10.2322/tastj.19.719","url":null,"abstract":"","PeriodicalId":120185,"journal":{"name":"TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN","volume":"7 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":"132586814","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}
{"title":"From Behavioural to In-Depth Modelling of a Scalable Spacecraft Power System in SystemC-AMS using Continuous Integration Techniques","authors":"J. Häseker, N. Aksteiner, A. Ofenloch","doi":"10.2322/tastj.19.709","DOIUrl":"https://doi.org/10.2322/tastj.19.709","url":null,"abstract":"","PeriodicalId":120185,"journal":{"name":"TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN","volume":"119 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":"116209956","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}
K. Hayashi, M. Nishida, H. Kurosaki, T. Yanagisawa
In this study, the momentum of the target when collided with a projectile at hypervelocity was measured. Pendulum targets were used in the experiments. The momentums of the target were calculated based on the maximum swing angle of the pendulum. The target material is comparable to aluminum alloy which was used for the rocket body. It is confirmed that, as the impact velocity increases, the ratio of momentum of the projectile before impact and the momentum of the target after impact changes. Furthermore, as the thickness of the target changes, the ratio of momentum of the projectile before impact and the momentum of the target after impact changes.
{"title":"Measurement of Momentum to Move with Hypervelocity Impacts of Projectile","authors":"K. Hayashi, M. Nishida, H. Kurosaki, T. Yanagisawa","doi":"10.2322/TASTJ.17.427","DOIUrl":"https://doi.org/10.2322/TASTJ.17.427","url":null,"abstract":"In this study, the momentum of the target when collided with a projectile at hypervelocity was measured. Pendulum targets were used in the experiments. The momentums of the target were calculated based on the maximum swing angle of the pendulum. The target material is comparable to aluminum alloy which was used for the rocket body. It is confirmed that, as the impact velocity increases, the ratio of momentum of the projectile before impact and the momentum of the target after impact changes. Furthermore, as the thickness of the target changes, the ratio of momentum of the projectile before impact and the momentum of the target after impact changes.","PeriodicalId":120185,"journal":{"name":"TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN","volume":"573 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":"116527090","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}
Yuri Matsushita, Y. Yoshimura, T. Hanada, Yuki Itaya, Tadanori Fukushima
{"title":"Risk Assessment of a Large Constellation of Satellites in Low-Earth Orbit","authors":"Yuri Matsushita, Y. Yoshimura, T. Hanada, Yuki Itaya, Tadanori Fukushima","doi":"10.2322/tastj.20.10","DOIUrl":"https://doi.org/10.2322/tastj.20.10","url":null,"abstract":"","PeriodicalId":120185,"journal":{"name":"TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN","volume":"8 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":"121358160","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}
Alperen Pala, T. Kuwahara, T. Saitou, Hiroki Uto, Y. Shibuya
{"title":"Space Demonstration of Boom Extension and De-orbit Sail Deployment of the Separable De-orbit Mechanism of Micro-satellite ALE-1","authors":"Alperen Pala, T. Kuwahara, T. Saitou, Hiroki Uto, Y. Shibuya","doi":"10.2322/tastj.20.65","DOIUrl":"https://doi.org/10.2322/tastj.20.65","url":null,"abstract":"","PeriodicalId":120185,"journal":{"name":"TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN","volume":"15 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":"128162435","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}
Hikaru Isochi, Hikaru Otabe, T. Uematsu, Nobuji Kato, K. Hori, Y. Morita, R. Akiba
The performance improvement and cost reduction of solid rocket propellants has been a major concern of the solid rocket community. The use of low melting temperature thermoplastic as a fuel binder is one of the solutions. This paper presents a molding method of LTPs (Low Melting Temperature Thermoplastic Propellant) and the result of tests with a new mixing device.
{"title":"The Low-Cost Rocket with Low Melting Temperature Thermoplastic Propellant","authors":"Hikaru Isochi, Hikaru Otabe, T. Uematsu, Nobuji Kato, K. Hori, Y. Morita, R. Akiba","doi":"10.2322/tastj.17.350","DOIUrl":"https://doi.org/10.2322/tastj.17.350","url":null,"abstract":"The performance improvement and cost reduction of solid rocket propellants has been a major concern of the solid rocket community. The use of low melting temperature thermoplastic as a fuel binder is one of the solutions. This paper presents a molding method of LTPs (Low Melting Temperature Thermoplastic Propellant) and the result of tests with a new mixing device.","PeriodicalId":120185,"journal":{"name":"TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN","volume":"31 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":"128273738","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}
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