A5021652991- Spacecraft Design and Technology
- Satellite Communication Systems
- Plasma Diagnostics and Applications
- Space Satellite Systems and Control
- Radiation Effects in Electronics
- Spacecraft and Cryogenic Technologies
- solar cell performance optimization
- Ionosphere and magnetosphere dynamics
- Advanced Battery Technologies Research
- Electrostatic Discharge in Electronics
- Electrical Fault Detection and Protection
- Vacuum and Plasma Arcs
- Photovoltaic System Optimization Techniques
- Space exploration and regulation
- Space Technology and Applications
- Particle accelerators and beam dynamics
- Technology Assessment and Management
- Bluetooth and Wireless Communication Technologies
- Structural Analysis and Optimization
- Cryptographic Implementations and Security
- Antenna Design and Analysis
- Particle Dynamics in Fluid Flows
- Advanced Frequency and Time Standards
- Silicon and Solar Cell Technologies
- Astro and Planetary Science
Kyushu Institute of Technology
2014-2024
Institute of Electrical Engineering
2009
Kyushu University
2004-2006
An international project has started to establish an International organization for standardization standard the electrostatic discharge (ESD) on solar array panel. For ESD ground test of satellite panel, it is important understand characteristics a primary arc discharge. A coupon made triple-junction cells used characteristics. In particular, experiment focuses measurement propagation speed plasma generated by arc. The analyzed using images captured high-speed video camera and image...
The effects of magnetic field configuration on thrust performance in a miniature microwave discharge ion thruster were investigated order to improve performance. First, the extracted beam current was measured for various levels strength field. It found that there is an optimum magnitude That this due tradeoff between mirror confinement and microwave-plasma coupling confirmed by measurement saturation into antenna thruster. decrease with increase strength, improvement confinement. estimated...
We describe scientific objective and project status of an astronomical 6U CubeSat mission VERTECS (Visible Extragalactic background RadiaTion Exploration by CubeSat). The goal is to reveal the star-formation history along evolution universe measuring extragalactic light (EBL) in visible wavelength. Earlier observations have shown that near-infrared EBL several times brighter than integrated individual galaxies. As candidates for excess light, first-generation stars early or low-redshift...
e = electronic charge F thrust g acceleration of gravity Ib extracted ion beam current Isp specific impulse mi mass ṁi flow rate for source ṁn neutralizer Pi incident microwave power Pn input Pr reflected Vb voltage α doubly charged to singly ratio γT coefficient ec production cost ηt efficiency ηu propellant utilization θb divergence angle
An electrostatic discharge test was carried out on a solar array paddle (SAP) for the Greenhouse gases Observing SATellite (GOSAT) simulated polar Earth orbit (PEO) environment. To simulate spacecraft charging conditions in PEO with an auroral band, when electrons higher energy than LEO plasma flow to Earth, three of dielectric can be considered each side SAP. At first, threshold voltage differences inception were measured experimentally using coupons simulating both beginning and end life...
With the recent increase in CubeSats’ ability to undertake complex and advanced missions, they are being considered for missions such as constellations, which demand high development efficiency. From a satellite interface perspective, productivity can be maximized by implementing flexible modular structural platform that promotes easy reconfigurability during integration testing phase. Thus, design of CubeSat plays crucial role facilitating process. In most cases, mechanical implemented...
A series of spacecraft charging analyses was carried out for large GEO satellites using Multi-Utility Spacecraft Charging Analysis Tool. The purpose to derive the number electrostatic discharges expected 15 years in orbit, which would be used as basis primary (ESDs) future solar cell coupon ESD tests. combinations plasma parameters (electron density, proton electron energy, and energy) that have a high probability occurrence been identified first. For each those parameters, analysis done. In...
Covers advancements in spacecraft and tactical strategic missile systems, including subsystem design application, mission analysis, materials structures, developments space sciences, processing manufacturing, operations, applications of technologies to other fields.
There is increasing demand of small satellite development and utilization worldwide. The recent explosive growth the launch has caused significant concerns among traditional space sector. Peaceful coexistence sector emerging crucial. a need to define "what satellite" lay out requirements satellites. In 2014, an activity started make ISO standard describe definition parallel, new study group was initiated at International Academy Astronautics. intends important input standard. Definition...
In the MUCES-C mission conducted by JAXA (Japan Aero Exploration Agency), a microwave neutralizer is mounted with ion engine on HAYABUSA space probe. The consists of an L-shaped antenna to inject microwaves and samarium cobalt magnets provide ECR (electron cyclotron resonance). Plasma production higher density than cutoff expected in discharge chamber, but so small that high-precision measurements using probe are difficult. To clarify plasma mechanism neutralizer, numerical analysis was code...
Covers advancements in spacecraft and tactical strategic missile systems, including subsystem design application, mission analysis, materials structures, developments space sciences, processing manufacturing, operations, applications of technologies to other fields.
High Voltage Technology Demonstration Satellite HORYU-II is a nanosatellite (30-cm cubic shape, 7 kg) developed by students at the Kyushu Institute of Technology. One objectives this satellite orbital demonstration high-voltage technologies. The with highest voltage generation in low earth orbit (LEO) has been International Space Station, generating 160 V. In orbit, especially LEO, use high over 200 V induces arcing. aimed to demonstrate new designs solar array that can generate power, free...
BIRDS-2, the second generation of Joint Global Multi-Nation Birds (JGMNB) project is a constellation 1U CubeSats from Laboratory Spacecraft Environment Interaction Engineering (LaSEINE), Kyushu Institute Technology, Japan. The BIRDS-2 consists three identical built by group students four nations; Japan, Malaysia, Philippines, and Bhutan. It 6 missions; Camera, Automatic Radio Packet Service-Digipeater (APRS-DP), Store Forward (S&F), COTS GPS, Anisotropic Magneto Resistance Magnetometer...
Space Systems/Loral (SS/L) successfully completed electrostatic discharge (ESD) tests of Multi-junction (MJ) GaAs/Ge solar array design in geosynchronous space environment. This ESD test was based on ISO-11221, systems - panels -Spacecraft Charging Induced Electrostatic Discharge Test Methods. In addition to the ISO reference for schematic, SS/L implemented modified circuitry better simulate on-orbit operational conditions our design. The circuit also included simulated panel coverglass...
Solar array paddle sizes have been larger to generate power that is enough operate many devices in only one satellite. The cover glass on solar can be charged GEO environment. A flashover discharge triggered by an electrostatic and propagates at a velocity with discharging the amount of charge stored glass. Therefore, current waveform depend size differential voltage. ESD ground testing needs simulating current, because large cause flashover. simulator has developed so far our laboratory.
The High-Voltage Technology Demonstration Satellite Horyu-2 is a nanosatellite (30 cm cubic shape, 7 kg) developed by the Kyushu Institute of Technology. It known that high-voltage power generation above 200 V in low Earth orbit induces arcing. main mission to demonstrate various technologies. satellite was launched on 18 May 2012 sun-synchronous at an altitude 680 km. succeeded generating 350 photovoltaic via specially designed solar array. Using generated voltage, experiments arc inception...
A series of electrostatic discharge (ESD) tests was performed on solar array test coupons consisting triple-junction InGaP <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> /GaAs/Ge cells. The string-to-string parallel gaps were not grouted with RTV adhesives. Various combinations the gap width, load voltage, and string current tested in a vacuum chamber equipped an electron beam gun to investigate threshold secondary arcs. ESD circuit...
This paper presents an approach to design a feasible and reliable monopole antennae deployment mechanism for CubeSat applications. Nano-satellite has faced problems in designing system due space constraints. In BIRDS-2 CubeSat, the nichrome wire burning release was used when activated, it will be heated up thermally cut through fishing line, allowing two antennas deployed on +Y board at +Z axis direction of satellite. These involved amateur radio frequencies UHF VHF bands its low cost high...
Covers advancements in spacecraft and tactical strategic missile systems, including subsystem design application, mission analysis, materials structures, developments space sciences, processing manufacturing, operations, applications of technologies to other fields.