Mikihiro Ikura, S. Ikari, A. Tomiki, R. Funase, S. Nakasuka
This research proposes estimation algorithms of relative position and attitude during interplanetary proximity rendezvous and docking by using ultra-wide-band (UWB) devices — which are small, low-power devices to be used for communication between several spacecraft, and are suitable to be mounted on micro- or nano-spacecraft. The device provides high-precision ranging and high-speed communication between two spacecraft during rendezvous and docking, whose information is used for estimating their relative position and attitude. This paper proposes two estimation algorithms using UWB properties. The first one estimates the relative position by using the ranging data of the UWB devices and the relative attitude information, which is shared by the UWB communication and provided by the attitude sensors. In the second algorithm, assuming that the attitude sensor of the chaser cannot be used, the relative attitude is estimated using the multiple ranging data of the UWB devices. This research evaluates the estimation accuracy of the two proposed algorithms using a rendezvous simulator, which reveals the conditions to obtain accurate and stable relative position and attitude estimations. This paper will contribute to autonomous navigation method for the proximity rendezvous and docking phases of micro- and nano-spacecraft, which have strict limitations of size and power for navigation sensors.
{"title":"Estimation Algorithm of Relative Position and Attitude during Proximity Rendezvous Using Multiple Ultra-Wide-Band Devices","authors":"Mikihiro Ikura, S. Ikari, A. Tomiki, R. Funase, S. Nakasuka","doi":"10.2322/TASTJ.17.43","DOIUrl":"https://doi.org/10.2322/TASTJ.17.43","url":null,"abstract":"This research proposes estimation algorithms of relative position and attitude during interplanetary proximity rendezvous and docking by using ultra-wide-band (UWB) devices — which are small, low-power devices to be used for communication between several spacecraft, and are suitable to be mounted on micro- or nano-spacecraft. The device provides high-precision ranging and high-speed communication between two spacecraft during rendezvous and docking, whose information is used for estimating their relative position and attitude. This paper proposes two estimation algorithms using UWB properties. The first one estimates the relative position by using the ranging data of the UWB devices and the relative attitude information, which is shared by the UWB communication and provided by the attitude sensors. In the second algorithm, assuming that the attitude sensor of the chaser cannot be used, the relative attitude is estimated using the multiple ranging data of the UWB devices. This research evaluates the estimation accuracy of the two proposed algorithms using a rendezvous simulator, which reveals the conditions to obtain accurate and stable relative position and attitude estimations. This paper will contribute to autonomous navigation method for the proximity rendezvous and docking phases of micro- and nano-spacecraft, which have strict limitations of size and power for navigation sensors.","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":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129930191","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}
Warley F. R. Ribeiro, Kentaro Uno, K. Nagaoka, Kazuya Yoshida
{"title":"Analysis of Motion Control for a Quadruped Ground-Gripping Robot for Minor Body Exploration on Uneven Terrain","authors":"Warley F. R. Ribeiro, Kentaro Uno, K. Nagaoka, Kazuya Yoshida","doi":"10.2322/tastj.19.794","DOIUrl":"https://doi.org/10.2322/tastj.19.794","url":null,"abstract":"","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":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121828991","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":null,"pages":null},"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}
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":null,"pages":null},"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}
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":null,"pages":null},"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}
Tetsuya Yamada, K. Kawahara, Taichi Itou, S. Nakazawa
{"title":"Return and Recovery Operation of the Hayabusa2 Sample Return Capsule","authors":"Tetsuya Yamada, K. Kawahara, Taichi Itou, S. Nakazawa","doi":"10.2322/tastj.19.514","DOIUrl":"https://doi.org/10.2322/tastj.19.514","url":null,"abstract":"","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":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127096419","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}
M. Akioka, A. Miura, T. Orikasa, H. Tsuji, M. Toyoshima, Masaki Satoh, Y. Fujino
To achieve high throughput to effectively accommodate users, multi-beam systems reusing several frequency bands with small beams are effective. Using a reflector antenna with a very large aperture on the satellite is a promising option for next-generation mobile communication satellites for small user terminals with small beams. A deployable reflector is a flexible structure instead of the hard dish reflector. To improve the electric al performance of the antenna and avoid performance deterioration caused by aberration, the parabolic reflector must be accurately shaped. We propose continuous beam stabilization by optimizing the parameters for the phased array. If the reflector shape can be measured precisely while in orbit, the beam pattern and antenna performance can be corrected continuously by updating the excitation parameters based on the measured reflector shape with a brief time delay. For the proposed algorithm to perform antenna-pattern stabilization effectively, the shape of the reflector surface should properly determine the optimized phased array parameters to compensate for the deterioration of the antenna pattern. The objective of this study is to confirm the feasibility of the approach to beam pattern correction. The simulations of deformed reflector surfaces deteriorating the antenna pattern reveal that the application of optimized phased array parameters for the reflector shape can compensate for the deformation and recover the antenna pattern.
{"title":"Precise Control of Beam Formation for Mobile Communication Satellites Based on On-board Measurements of the Shape of the Large Reflector Surface","authors":"M. Akioka, A. Miura, T. Orikasa, H. Tsuji, M. Toyoshima, Masaki Satoh, Y. Fujino","doi":"10.2322/TASTJ.17.33","DOIUrl":"https://doi.org/10.2322/TASTJ.17.33","url":null,"abstract":"To achieve high throughput to effectively accommodate users, multi-beam systems reusing several frequency bands with small beams are effective. Using a reflector antenna with a very large aperture on the satellite is a promising option for next-generation mobile communication satellites for small user terminals with small beams. A deployable reflector is a flexible structure instead of the hard dish reflector. To improve the electric al performance of the antenna and avoid performance deterioration caused by aberration, the parabolic reflector must be accurately shaped. We propose continuous beam stabilization by optimizing the parameters for the phased array. If the reflector shape can be measured precisely while in orbit, the beam pattern and antenna performance can be corrected continuously by updating the excitation parameters based on the measured reflector shape with a brief time delay. For the proposed algorithm to perform antenna-pattern stabilization effectively, the shape of the reflector surface should properly determine the optimized phased array parameters to compensate for the deterioration of the antenna pattern. The objective of this study is to confirm the feasibility of the approach to beam pattern correction. The simulations of deformed reflector surfaces deteriorating the antenna pattern reveal that the application of optimized phased array parameters for the reflector shape can compensate for the deformation and recover the antenna pattern.","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":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126113056","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}
JAXA offers a program called “Aerospace School” to high school students as a form of informal education. Participants are divided into teams and work together to come up with a theme for their mission at various JAXA facilities. They also allocate roles and responsibilities among themselves. The goal is not only to provide Science, Technology, Engineering and Mathematics (STEM) knowledge, but also to build their confidence. We hope this experience will help young adults think about their future career paths, and we strive to actively help them realize their potential. This paper presents the methods, specific examples of, and changes to the Aerospace School program that occurred between 2014 and 2017.
{"title":"JAXA Space Education Program for Informal Education: A Case Study of the “Aerospace School” Program","authors":"Keiko Miyata","doi":"10.2322/tastj.17.506","DOIUrl":"https://doi.org/10.2322/tastj.17.506","url":null,"abstract":"JAXA offers a program called “Aerospace School” to high school students as a form of informal education. Participants are divided into teams and work together to come up with a theme for their mission at various JAXA facilities. They also allocate roles and responsibilities among themselves. The goal is not only to provide Science, Technology, Engineering and Mathematics (STEM) knowledge, but also to build their confidence. We hope this experience will help young adults think about their future career paths, and we strive to actively help them realize their potential. This paper presents the methods, specific examples of, and changes to the Aerospace School program that occurred between 2014 and 2017.","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":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132301323","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":null,"pages":null},"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}
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