tokyo tech small satellite development projects - cute-1.7 and tsubame -

26
Tokyo Tech Small Satellite Development Projects - Cute-1.7 and TSUBAME - Katsutoshi Imai, Naoki Miyashita, Masafumi Iai, Kuniyuki Omagari, Masashi Asami, Wataru Miyazawa, Hideyuki Yabe, Kei Miyam oto, Takeshi Usuda, Ken Fuji wara, Shinji Masumoto, and Saburo Matunaga Laboratory for Space System (LSS) Department of Mechanical and Aerospace Engineering Tokyo Institute of Technology

Upload: eadoin

Post on 07-Jan-2016

39 views

Category:

Documents


0 download

DESCRIPTION

Tokyo Tech Small Satellite Development Projects - Cute-1.7 and TSUBAME -. Katsutoshi Imai, Naoki Miyashita, Masafumi Iai, Kuniyuki Omagari, - PowerPoint PPT Presentation

TRANSCRIPT

Page 1: Tokyo Tech Small Satellite        Development Projects - Cute-1.7 and TSUBAME -

Tokyo Tech Small Satellite Development Projects

- Cute-1.7 and TSUBAME -

Katsutoshi Imai, Naoki Miyashita, Masafumi Iai, Kuniyuki Omagari,Masashi Asami, Wataru Miyazawa, Hideyuki Yabe, Kei Miyamoto, Takeshi Usuda, Ken Fujiwara, Shinji Masumoto, and Saburo Matunag

a

Laboratory for Space System (LSS)Department of Mechanical and Aerospace Engineering

Tokyo Institute of Technology

Page 2: Tokyo Tech Small Satellite        Development Projects - Cute-1.7 and TSUBAME -

WSANE 2005Mar 4, 2005

Contents Introduction

Cubesat CUTE-I

Cute-1.7 Mission overview Enginering model

TSUBAME Mission overview Conceptual design model

Conclusion

Page 3: Tokyo Tech Small Satellite        Development Projects - Cute-1.7 and TSUBAME -

WSANE 2005Mar 4, 2005

Cubesat Project - CUTE-I Laboratory for Space System(LSS) at

Tokyo Tech 1st satellte

CUTE-I 10cm×10cm×10cm

1kgAcquisition of satellite

bus technology

June, 2003 Plesetsk, Russia

Page 4: Tokyo Tech Small Satellite        Development Projects - Cute-1.7 and TSUBAME -

WSANE 2005Mar 4, 2005

Beyond CubeSat

Cute-1.720cm×10cm×10cm

2kg

Demonstration of new design methodology

TSUBAME30cm×30cm×20cm

16kgScience observation

Page 5: Tokyo Tech Small Satellite        Development Projects - Cute-1.7 and TSUBAME -

Cute-1.7 Project

Page 6: Tokyo Tech Small Satellite        Development Projects - Cute-1.7 and TSUBAME -

WSANE 2005Mar 4, 2005

Purposes of Cute-1.7 Project To facilitate future picosatellite development by dem

onstrating a new design methodology.

⇒ Use of PDA and its peripheral devices.

To demonstrate newly developped observation equipment

⇒ Use of low energy particle sensor named APD

To share experiment opportunities using real satellite with space engineering community.

⇒ Advanced magnetic torquers control algorithm

Page 7: Tokyo Tech Small Satellite        Development Projects - Cute-1.7 and TSUBAME -

WSANE 2005Mar 4, 2005

PDA as an OBC To facilitate development

PDA has merits of  ・・・ COTS Programming   Enviroment

   (Windows CE.NET) Variety of I/F

   (USB, Memory card slot, etc)

Radiation Test (at Osaka Univ.)

Low probability of SEU or SEL

Hitachi PDA NPD-20JWL

100m

m

70 mm

US

B

CF

slot

SD

slot

Data acquisition system, Comm controller, Camera, Memory card

Page 8: Tokyo Tech Small Satellite        Development Projects - Cute-1.7 and TSUBAME -

WSANE 2005Mar 4, 2005

Magnetic Torquers Simple, reliable mechanism

-Best suit picosatellites

Cute-1.7 satellite is equipped with three magnetic torquers.

Offer Cute-1.7 as a test bed to space engineering community.

3-axis stabilization Spin up

Control programupload

Page 9: Tokyo Tech Small Satellite        Development Projects - Cute-1.7 and TSUBAME -

WSANE 2005Mar 4, 2005

Functionality for Radio amateurs We have used and will use amateur radio fre

quencies To provide communication resources for the gene

ral amateur radio community To return something to amateur radio commu

nity, Packet Repeater is installed. Uplink: 1.2GHz Downlink: 430MHz (shared with telemetry line)

Page 10: Tokyo Tech Small Satellite        Development Projects - Cute-1.7 and TSUBAME -

WSANE 2005Mar 4, 2005

Satellite Disposal by Tether

Carbon Nanotube Electron Emitter

・ Small Satellites: Short lifetime & Many: Short lifetime & Many

Become Debris. Difficult to track.

Debris reduction measure affects if use of small satellites grow.

High Voltage Power Supply

Separation Mechanism

Disposal by Electrodynamic Tether

Altitude Decrease

Lorentz Force

ReentryElectron Emitter(CNT)

Page 11: Tokyo Tech Small Satellite        Development Projects - Cute-1.7 and TSUBAME -

WSANE 2005Mar 4, 2005

APD by Tokyo Tech astronomy lab.

・ Very small

・ Low-power consumption

・ High performance

i. High speed response

ii. Internal gain

Characteristics

Avalanche Photodiode (APD) is a new charged-particle detector

APD

Considering to equip it with much larger satellite in the future

APD Demonstration

Page 12: Tokyo Tech Small Satellite        Development Projects - Cute-1.7 and TSUBAME -

WSANE 2005Mar 4, 2005

Separation System

衛星

分離機構 ナイロン線

把持爪

分離

方向

ばね

力Nylon lineSeparation

System

Jaws

Cute-1.7

Sep

arat

ion

dire

ctio

n

It consists of 4 jaws, a nylon line and a heater

These jaws hold pillars of CUTE-1.7and are tightened by the nylon line.

The nylon line is heat to be cut.

The jaws release the CUTE-1.7 pillars.

Same mechanism as one used for CUTE-IThe size is adjusted to CUTE-1.7

Page 13: Tokyo Tech Small Satellite        Development Projects - Cute-1.7 and TSUBAME -

WSANE 2005Mar 4, 2005

Launch Rocket M-V Rocket #8 Sub Payload

JAXA / ISAS solid rocket balance weight space in 3rd stage

サブペイロード

ロケット機体

Sub payload

M-V Rocket

orbit: Perigee h=185km apogee h=800km

Page 14: Tokyo Tech Small Satellite        Development Projects - Cute-1.7 and TSUBAME -

WSANE 2005Mar 4, 2005

Current Status of Project

EM integration test with APD has been done. Launch is scheduled in 2005.

10cm

20cm

10cm

EM integration test Body structure

Page 15: Tokyo Tech Small Satellite        Development Projects - Cute-1.7 and TSUBAME -

TSUBAME Project

Page 16: Tokyo Tech Small Satellite        Development Projects - Cute-1.7 and TSUBAME -

WSANE 2005Mar 4, 2005

Mission Background - GRB

RIKEN  Space Radiation Lab.

数十秒

明るさ

http://heasarc.gsfc.nasa.gov/

Gamma-ray Burst (GRB) The biggest explosion phenomenon since

the Big Bang Early phase of genesis is not understood

Drawback of Observation Extremely short Observation within 10sec is desired, but bi

g satellite has poor maneuverability

Origin of high energy radiation, magnetic field structure (gamma-ray burst, active galaxy, supernova remains)

Several dozen of minites

Page 17: Tokyo Tech Small Satellite        Development Projects - Cute-1.7 and TSUBAME -

WSANE 2005Mar 4, 2005

Mission Background - PolarizationObservation approaches

Photometry Spectroscopy Imaging Polarization

Only polarization is still kept intact. Polarization is expected to elucidate origin of high energy radiation or magnetic structure, due to its completely different aspect of the observation approach.

TSUBAME observes polarization of astronomical burst objects

Page 18: Tokyo Tech Small Satellite        Development Projects - Cute-1.7 and TSUBAME -

WSANE 2005Mar 4, 2005

Mission Overview

1. Burst occurrence

2. Detect direction3. Prompt attitude

maneuver4. Within 10 sec, ob

servation starts

Scattering type hard X-ray polarization

detector

Gamma-ray burst direction detector

2 detector observe polarization of gamma-ra

y burst

(Using APD sensors)

Page 19: Tokyo Tech Small Satellite        Development Projects - Cute-1.7 and TSUBAME -

WSANE 2005Mar 4, 2005

ADCS - CMG

mNm40T

CMG specifications

Ave. output torque mNmT 40

Control Momentum GyroControl Momentum Gyro (( CMGCMG ))

For large spacecraft (ISS, Mir ,etc)

Density (material: brass) 8920kg/m3

wheel diameter 50mm

wheel thickness 12mm

wheel weight 200g

Page 20: Tokyo Tech Small Satellite        Development Projects - Cute-1.7 and TSUBAME -

WSANE 2005Mar 4, 2005

Realization of Prompt Attitude maneuvers

            

Prompt attitude maneuver meets the requirement !

Low inertia

Small satelliteHigh torque output

CMG+

Page 21: Tokyo Tech Small Satellite        Development Projects - Cute-1.7 and TSUBAME -

WSANE 2005Mar 4, 2005

Advanced Technology Demonstration

Technical challenges Downsizing design (Low energy, weight) Robust and singularity avoidance control

   Small satellite is a suitable platform for the early demonstration of study results

Page 22: Tokyo Tech Small Satellite        Development Projects - Cute-1.7 and TSUBAME -

WSANE 2005Mar 4, 2005

Simulation result of CMGfrom wheel accelerationfrom wheel acceleration

to observation beginningto observation beginning

attitude angle(quaternion)

angular rate

-0.2-0.18-0.16-0.14-0.12-0.1

-0.08-0.06-0.04-0.02

00.02

0 2 4 6 8 10 12 14

Time [sec]A

ngul

er V

eloc

ity [

rad/

s] .

-1

-0.75

-0.5

-0.25

0

0.25

0.5

0.75

1

0 2 4 6 8 10 12 14Time [sec]

Qua

tern

ion

10sec

Page 23: Tokyo Tech Small Satellite        Development Projects - Cute-1.7 and TSUBAME -

WSANE 2005Mar 4, 2005

Concept design of satellite system

30cm

20cm30cmSize 30cm×20cm×30cm

Weight 16kg

Orbit Sun-synchronize: Altitude 800km, Inclination 98.6°

Life-time 1 year

Mission Gamma-ray burst direction sensor (CsI & APD)Polarimeter (P-Sci & PMT)

ADCS Control: CMG, Magnet torquerDetermination: Gyro, Sun sensor, Magnet sensor

C&DH 32bit MPU (COTS) SDRAM 32MB

Comm. S-band Tx (Mission data) BPSK 200kbpsS-band Tx ( HK data ) BPSK 9600bpsS-band Rx ( Command data ) PM 9600bpsS-band mono pole / patch antenna

EPS Multi-junction cell( efficiency 22%) Power generation approx. 40W Li-ion battery Peak power tracking system

Structure Paddle unfolding mechanismPassive thermal control

Page 24: Tokyo Tech Small Satellite        Development Projects - Cute-1.7 and TSUBAME -

WSANE 2005Mar 4, 2005

Present status and future works

Conceptual design level now

⇒ BBM fabrication phase Launch date is assumed in 2007 Cooperation with JAXA

Page 25: Tokyo Tech Small Satellite        Development Projects - Cute-1.7 and TSUBAME -

WSANE 2005Mar 4, 2005

Conclusion  Tokyo Tech satellite development projects

"Cute-1.7" and "TSUBAME" Cute-1.7 is a 2kg Cubesat using PDA as a

main computer, and has a science mission of on-orbit demonstration for an advanced high quality APD sensors

TSUBAME is expected to pursue a full-fledged science observation mission, and also demonstrate small-sized CMG system performance for prompt attitude maneuvers.

Page 26: Tokyo Tech Small Satellite        Development Projects - Cute-1.7 and TSUBAME -

ENDThank you for listening.

Tokyo Institute of Technology