研究者詳細 - 趙　孟佑

論文 - 趙　孟佑

分割表示643 件中 261 - 280 件目／全件表示 >>

Ground Tests and In-Orbit Results for the Horyu-II Nanosatellite Power System 査読有り

OKADA Kazuya, SERI Yuki, SHIBAGAKI Ryunosuke, Satellite Project Kyutech, MASUI Hirokazu, CHO Mengu

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN ( 一般社団法人日本航空宇宙学会 ) 12 ( 29 ) Tf_49 - Tf_56 2014年01月

担当区分：責任著者記述言語：英語掲載種別：研究論文（学術雑誌）

The Kyutech (Kyushu Institute of Technology) Satellite Project developed a high-voltage demonstration satellite called "Horyu-II" between 2010 and 2012. Horyu-II is a nanosatellite 350 mm x 310 mm x 315 mm (X*Y*Z) in size, with a mass of only 7.1 kg. This satellite was launched on May 18, 2012 as a piggy-back payload of the 21st H-IIA launch. Its missions are the demonstration of high-voltage technology in orbit, mitigation of electrostatic discharge (ESD), and so on. In this paper, we describe the design of the power system and its verification through various ground tests. The power system is equipped with a thin-film double-junction GaAs solar cell, with an efficiency of 20%, as the primary power source for the first time in orbit. The satellite also carries Ni-MH batteries for power storage. The power system architecture was simplified as much as possible with failure prevention mechanisms, such as over-current protection and various switches related to safety and debris mitigation. We present the analysis of the telemetry data obtained after the launch and validate the effectiveness of the design and verification processes.

DOI： 10.2322/tastj.12.Tf_49

CiNii Article

その他リンク： https://ci.nii.ac.jp/naid/130004699597

Erratum for "Laboratory Tests to Standardize Environment Test Conditions of Micro/Nano Satellite Units" [Trans. JSASS Aerospace Tech. Japan Vol. 12, No. ists29, pp. Pf_1-Pf_10, 2014] 査読有り

BATSUREN Amgalanbat, TOMIDA Kenta, HATAMURA Toru, MASUI Hirokazu, CHO Mengu

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN ( 日本航空宇宙学会 ) 12 ( 29 ) Pf_39 - Pf_40 2014年01月

Effects of Energetic Electron and Proton Irradiation on Electron Emission Yield of Polyimide Induced by Electron and Photon 査読有り

WU Jiang, MIYAHARA Akira, KHAN Arifur, IWATA Minoru, TOYODA Kazuhiro, CHO Mengu, ZHENG Xiaoquan

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN ( 一般社団法人日本航空宇宙学会 ) 12 ( 29 ) Pr_13 - Pr_19 2014年01月

記述言語：英語掲載種別：研究論文（学術雑誌）

As the electron emission yield induced by electron and photon plays a key role in surface potential of spacecraft materials, the ground based degradations including 500 keV electron and 50 keV proton irradiation with 4 different fluences were conducted for the polyimide film separately. Based on the developed measuring systems, the comparative measurements of total electron emission yield and photoelectron emission yield were carried out for the virgin and degraded polyimide samples respectively. The total electron emission yield and photoelectron emission yield tended to have different variation tendency after high energy electron and proton irradiation. The Monte-Carlo analysis software Casino and SRIM were used to analysis the distribution and stopping power of electron and proton respectively. According to the measurement results and analysis, the free radicals caused by irradiation was considered to be the main effect for polyimide films, which can primarily reveal the degradation mechanism of energetic electron and proton on the emission yield of polyimide.

DOI： 10.2322/tastj.12.Pr_13

CiNii Article

その他リンク： https://ci.nii.ac.jp/naid/130004548652

Discharge Observation on Antenna Surface Radiating High-power Microwaves in Simulated Space Environment 査読有り

WOO Hyounggwan, KHAN Arifur R., MASUI Hirokazu, CHO Mengu, MIYAKAWA Takehiro, FUJITA Tatsuhito

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN ( 日本航空宇宙学会 ) 12 ( 0 ) 11 - 19 2014年01月

記述言語：英語掲載種別：研究論文（学術雑誌）

The space solar power system (SSPS) transfers enormous amounts of electrical energy through microwaves. When high-power microwaves are irradiated from an antenna in a LEO plasma environment, there is a concern about discharge caused by interaction between the plasma and the microwaves. There has been no experimental observation of such an interaction phenomenon. Verification experiments are essential for SSPS to become a reality. We examine whether discharge or related phenomena occur or not on patch antennas under various conditions in the laboratory. We verify the hypothesis of discharge inception that the discharge is caused by multipactoring and breakdown of the outgas product. We compute the minimum electric field for the discharge inception.

DOI： 10.2322/tastj.12.11

CiNii Article

その他リンク： https://ci.nii.ac.jp/naid/130003395403

Time and Space Redundancy Fault Tolerance Trade-offs for FPGA Based Single and Multicore Designs 査読有り

IBRAHIM Mohamed Mahmoud, ASAMI Kenichi, CHO Mengu

TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN ( 一般社団法人日本航空宇宙学会 ) 12 ( 29 ) Pj_15 - Pj_24 2014年01月

記述言語：英語掲載種別：研究論文（学術雑誌）

This paper investigates the gains and losses in terms of power, area, reliability, and speed when applying time redundancy fault tolerance techniques on single core designs compared to space redundancy fault tolerance techniques applied to multi-core designs. The system is developed on the virtex5 FPGA from Xilinx, it uses 65nm technology with a relatively moderate to high static power consumption. The system consists of two design alternatives. The first is a single core embedded processing system that applies time redundancy fault tolerance through execution repetition to perform self-check pointing through consensus. The second system is built from 3 soft IP core processors which perform a space redundancy approach through Triple-Modular-Redundancy (TMR) with feedback among the processors. The performance of both systems is evaluated in terms of the execution speed and latency due to fault tolerance techniques compared to the non-fault tolerant system.

DOI： 10.2322/tastj.12.Pj_15

CiNii Article

その他リンク： https://ci.nii.ac.jp/naid/130004706673

Total electron emission yields of typical polymers 査読有り

Chen Y., Wu J., Cho M., Toyoda K.

Proceedings of IEEE International Conference on Solid Dielectrics, ICSD 752 - 755 2013年12月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

In this paper, a pulsed scanning method for the total electron emission yield measurement of insulating materials is proposed. A total electron detector with big hollow space and insulating spacer, and a pulsed yield scanning measurement system is recommended. This method can avoid influence from the charged surface of the insulating material. Using the system, the total secondary electron emission yields of several typical polymers, such as, PA, PS, PI, PTFE, HDPE, PC, PMMA, PEEK, PET, UHMW-PE, have been reported, as induced by a 30 microsecond pulse of primary electrons with ∼ 20 nA incident beam current and energies up to 2500 eV. © 2013 IEEE.

DOI： 10.1109/ICSD.2013.6619757

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84891617612&origin=inward

Vacuum-proof characteristic test of the adhesive for asteroid sample return 査読有り

Honda K., Iwata M., Cho M., Okamoto C., Yano H.

European Space Agency, (Special Publication) ESA SP 705 SP 2013年12月

記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

The asteroid probe "Hayabusa (MUSES-C)" was launched 011 May 9. 2003. JAXA has been examining the sample return mechanism for a next-generation asteroid probe, by using adhesive. A next generation asteroid probe requires long period of time from launch to return. Moreover, it is a deep concern whether the functioning of an adhesive continues under the space harsh environment. Therefore, the evaluation of the space environment that resistant adhesive should be done by simulating the space environment before launch. The purpose of this research is to evaluate the life of adhesive going to be used for the sample collection and return from an asteroid simulating the space environment in ground test. Copyright © 2013 European Space Agency.

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84892659953&origin=inward

Development of Mission Payloads onboard High Voltage Technology Demonstration Satellite HORYU-I （共著）I 査読有り

Tatsuya Yoke, Shunsuke Iwai, Arifur Khan, Hirokazu Masui, Minoru Iwata, Kazuhiro Toyoda, Mengu Cho

IEEE Transactions on Plasma Science 41 ( 12 ) 3477 - 3486 2013年12月

Comparison of low Earth orbit wake current collection simulations using Nascap-2k, SPIS, MUSCAT and computer codes　（共著）査読有り

V.A. Davis, M.J. Mandell, D.C. Cooke, A. Wheelock, J.-C. Mateo-Velez, J.-F. Roussel, D. Payan, M. Cho, K. Koga

IEEE Transaction on Plasma Science 41 ( 12 ) 3303 - 3309 2013年12月

Investigation Into Surface Potential Decay of Polyimide by Unipolar Charge Transport Model（共著）査読有り

Daomin Min, Shengtao Li, Mengu Cho, Arifur R. Khan

IEEE Transaction on Plasma Science 41 ( 12 ) 3349 - 3358 2013年12月

Total Electron Emission Yield Measurement of Solid Materials by A Scanning Small Detector 査読有り

Yu Chen, Jiang Wu, Ryuta Kunimitsu, Andy Gray, Kazuhiro Toyoda, Mengu Cho

IEEE Transaction on Plasma Scienc 41 ( 12 ) 3558 - 3564 2013年12月

Development of a Very Small on-Board Oscilloscope for a Cube-Satellite HORYU-3（共著）査読有り

Tatsuo Shimizu, Hiroshi Fukuda, Shota Hidaka, Shunsuke Iwai, Kazuhiro Toyoda, Mengu Cho

5th Nano-Satellite Symposium 2013年11月

Overview of Nano/Micro Satellite for Environmental Testing in CeNT（共著）査読有り

Hirokazu Masui, Toru Hatamura, Mengu Cho

5th Nano-Satellite Symposium 2013年11月

Development of a shock test method suitable for Nano-Satellites; Performance evaluation（共著）査読有り

Toru Hatamura, Shingo Kimoto, Hirokazu Masui, Mengu Cho, Kazuo Maeno

5th Nano-Satellite Symposium 2013年11月

Testing it’s practicability as power storage unit of a nano-satellite（共著）査読有り

Muhammad ALKALI, Takuya MOTAHATA, Tatsuo SHIMIZU, Hirokazu MASUI, Mengu CHO

5th Nano-Satellite Symposium 2013年11月

Design Concept of Horyu-V The Space Environment Explorer（共著）査読有り

M.M. Ibrahim, A. Batsuren, M. Alkali, M. Nori, P. Ammarin, P. Faure, M. Cho

The 5th Nano-Satellite Symposium 2013年11月

Reliability Growth of Small-scale Satellites through Testing（共著）査読有り

Mengu Cho, M. Ibrahim

The 5th Nano-Satellite Symposium 2013年11月

Development of a Very Small on-Board Oscilloscope for a Cube-Satellite HORYU-3（共著）査読有り

T. Shimizu, S. Hidaka, M.M. Ibrahim, S. Iwai, K. Toyoda, H. Masui, M. Cho

The 5th Nano-Satellite Symposium 2013年11月

Basic Research on Vibration Test Standardization for Small-scale Satellites（共著）査読有り

Amgalanbat Batsuren, Toru Hatamura, Hirokazu Masui, Mengu Cho

5th Nano-Satellite Symposium 2013年11月

Radiation test for Horyu3’s bus-system using Californium252（共著）査読有り

Yuta Okumura, Hirokazu Masui, Cho Mengu

The 5th Nano-satellite Symposium 2013年11月

　前のページ - 次のページ　

<趙 孟佑>

論文 - 趙 孟佑

<趙　孟佑>

論文 - 趙　孟佑