高電圧技術実証衛星「鳳龍弐号」の紹介

High Voltage Technology
Demonstration Satellite “HORYU-II”
Kyushu Institute of Technology
2012/3/13
1
HORYU-II’s goal
• Education
– Hands on experience through system engineering.
• Bachelor’s, Master’s and PhD (Doctorate in Nano-Satellite Technology, DNST)
– Change mind setup for the Nano-satellites
• Its cost and time effective
• Can accelerate more space exploration.
• Technology demonstration
– New technology demonstration in space developed by LaSEINE at KIT.
– Develop Nano-satellites for various space research..
• Business
– Develop more new nano-satellites to help people.
– Provide support to other (company and/or university) through CNT at KIT
2
High Voltage Technology Demonstration Satellite “HORYU-II”
In orbit “300V generation & control of electrical discharge”
2012～
In the middle of 1990～
Space factories, space hotel
Voltage, V
High-voltage induces
Electro-Static
Discharges
～in the middle of 1990
Space solar power system
ISS
High Voltage Technology Demonstration Satellite “HORYU-Ⅱ”
In Space orbit
※©KYOSEMI http://www.kyosemi.co.jp/sphelar/
High Voltage Technology Demonstration Satellite “HORYU-Ⅱ”
HORYU-II project’s goal
Things to be
considered when you
design a system
Things to be
considered:
difficult to foresee
What is the best
evaluation method?
How to design
a flawless system
Effective method:
Think
for development
Improvement through
satellite operation
Learn Manufacturing through real satellite development
High Voltage Technology Demonstration Satellite “HORYU-Ⅱ”
Observation by small camera
Consumer product
「surface potential measurement 」
Demonstration in space
High Voltage Technology Demonstration Satellite “HORYU-Ⅱ”
ELF
ELF
Detect debris
by this sensor
Demonstration of electron-emitting
film (ELF) for discharge mitigation
Acknowledgment
Thank you all who help this satellite project.
2012/3/13
Kyushu Institute of Technology
Satellite development project
8
The specification of HORYU-Ⅱ
Size
Mass
Operation life time
Orbit
Solar cell
Battery
Power consumption
Radio
Transmission Power
FM Protocol & modulation
Frequency
Communication Speed
Atttitude Control
Thermal control
Sensors
Missions
350×310×315mm （X×Y×Z）
7.1 kg
1 year
Sun-synchronous (680km, 98.2 degree)
5 paralle strings of 4 series connected dual junction GaAs solar cells
3 parallels of 3 series, 1.2V, 1900mAh (Ni-MH)
Total capacity 5700mAh
Normal operation mode (CW only) ： 1.13W
Normal operation mode (waiting for FM uplink) ： 0.86W
Mission mode (Maximum)）： 2.70W
Nishi-musen 301A
1W approx.
Ax.25 &FSK
Up Link ： 145MHz、Down Link ： 437.375MHz
FM communication: 1200bps, CW communication (beacon): 20wpm
Passive control via permanet magnet and hysteresis dumper
・ Passive thermal control on the external surface
・ Insulation of battery box and heater control
Solar cell voltage & current
Battery voltage & current
Temperature (panel inside x6, radio, battery x3)
Angular velocity
300V photovoltaic power generation in LEO
Demonstration of solar array discharge suppression technologies at 300V
Demonstration of electron emission film (ELF)
Demonstration of Commercial-Off-The-Shelf surface potential monitor
Demonstration of debris sensor
Taking photograph of the Earth and distribution of the image for outreach
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