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ITU pSAT II ADCS :Getting Ready for Lauch
Asc. Prof. Gökhan İnalhan, Elgiz Başkaya,Emre Koyuncu ve ITU.CAL personnel
Industrial Project
• Fundamental Industrial Projects– DPT– ASELSAN– SSM, BİLUZAY
İTÜ LCH AVIONICSARCHITECTURE
İTÜ ASELSAN HTD
İTÜNetwork Mission Simulator
MSc/PhD Research
Path planning in 3D at realtime
UAVs
Nonlinear Autonomous Flight ControlsFor Agile Maneuvering
Spacecraft Design
İTÜpSAT I
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Design– İTÜ pSAT I
• First university research satellite of Turkey.– Payload and Objectives:
• Passive Magnetic Stabilization• Low resolution image, • Inertial measurements and • Telemetry capturing
CMOS Camera
Sensor
Board
Passive Magnetic Stabilization
Power Board
Transceiver On Board Computer
Production Phasing
Design and Prototyping – Desktop Models
Analysis and Testing –Engineering Models
Launch – Flight ModelsOrbit 720 km sun-synchronous
Subsystems of ITU pSAT I
CMOS Camera
Sensor Board
Passive Magnetic Stabilization
Power Board
Transceiver On Board Computer
Mass : 995 mgPower : 6 WCurrent : 1.5 A
System Integration
• Clean Room (Class 1000) : 25 meter square– Embeds the thermal
vacuum chamber also• Clean Room (Class 10000)
: 8 meter square– For experimental and
educational purposes
Typical Test Scenario
Rubin 9.1, Rubin 9.2, UWE-2, Beesat, ITUpSAT1 and Swisscube
PSLV C-14 : Launch 23.09.2009POLAR SATELLITE LAUNCH
VEHICLE (PSLV)
Current Status of ITU pSAT I
• ITU pSAT I is alive and kicking even though we had a major ground station problem with– the modem malfunctions and – the software resets
• Clear beacon and health status bits• Many thanks to people all over the world who
are still keeping track of ITU pSAT I– US, Germany, Italy, Norway, Japan, amateur radios
all over Turkey.... To name a few....
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Project Realm
SatelliteDesign / Analysis / Production
Ground StationAmateur Band
CubeSAT Network
Test & IntegrationInfrastructure / Payloads
/ Systems
Thermal Vacuum, Vibration, EMC
Training Spacecraft Systems Design
TUBITAK 108M523
• The second nanosatellite project coming fromITU.CAL– Development of a High Performance Bus for Nano Satellites wıth
Attitude Control
Design Philosopy
• This project aims to develop a 3-axis controlledstandardized platform (bus and payload interfaces) for pico and nano sized satellites (1-10 kg) for application such as– On orbit test and verification
of new electronic, controls and material technologies
– On orbit scientific experiments
– Medium resolution imaging (scale of 50m-500m)
The Bus
• A unique bus based design– Structured around a CAN Bus
and the cubesat kit bus– Flexible and scalable across
form factors
• Bus consists of mostly in-house, in-development parts– OBC– EPS– ADCS– COM (UHF)– Payload Interface Unit (PLIU)
Bus Components
BUS•OBC : Aerocon NanoOBC I•Comm : AstroDev Li-1 UHF Transceiver•EPS : Gomspace QBP4 and P30U •Solar Panels : Gomspace NanoPower Solar Panel 1ea P100U, 1ea P100 and 3e P300Us•Structure : AeroconNano 3U STR•Mechanisms : Aerocon MagBoom 3U , Aerocon AntBoom 3U•Bus and cable bunde : Aerocon
Satellite Structural Design
Inside View Outside View
In orbit...
Structural Components
GPS Patch Antenna
GPS Receiver
Li-1 Radio
EPS Board
Battery Board
Sensor Board
EHF Transponder
EHF Patch Antenna
Camera
Reaction Wheels
Magnetoboom
Magnetorquers
Deployable Antennas
S-Band Patch Antenna
Payload II : ADCS
• Payload II : Aerocon NanoADCS I– ADC Computer : Aerocon NanoADC Computer I– Reaction Wheels : Aerocon NanoRW I– Magnetotorquer : Gomspace – GPS : SSTL SGR05U with patch antenna– Sensors :
• Magnetometer Honeywell HMR 3300• Inertial Sensor Analog Devices ADIS 16405• Photo diode X 5 ( 1 useless) Gomspace (on the solar panels)• Gyro X 4 Analog Devices ADIS 16251 (on the solar panels)• Temperature Sensor X 5 National Semiconductor LM70 (on the solar panels)
Payload I and III
PAYLOAD•Primary Payload I : Aerocon NanoCam I•Payload II : Astrodev Be-1 S-Band Transmitter
Camera : Primary Payload
SONY NEX-5Dimensions; 110.8 x 58.8 x 38.2 mmWeight (with Battery and Memory Card) 239 gLens Mounting Compatibility; Sony E-Mount, 16mm, 18-55mm, 18-200mm
ADC SIL/HIL
ADCS Algorithmic Framework
Detumbling Mode
Project Realm
SatelliteDesign / Analysis / Production
Ground StationAmateur Band
CubeSAT Network
Test & IntegrationInfrastructure / Payloads
/ Systems
Thermal Vacuum, Vibration, EMC
Training Spacecraft Systems Design
UUBF Ground Station
• UHF-VHF Bands• Amateur Radio
New Ground Station
440MHz uplink/downlink S-band downlink High attitude accuracy Two options:
USRP: Software Defined Radio
Commercial radio option
Project Realm
SatelliteDesign / Analysis / Production
Ground StationAmateur Band
CubeSAT Network
Test & IntegrationInfrastructure / Payloads
/ Systems
Thermal Vacuum, Vibration, EMC
Training Spacecraft Systems Design
Space Education
• Re-designed and gave the UZB422E Spacecraft Systems Design course (2006-2010)– Basically the last course for space engineers before
graduating from class.– First 7 lectures focuses on all the aspects of
spacecraft systems with project homeworks for the “Graduating Class Spacecraft Design Competition”
– Last 7 lectures focuses on building protoypes of major components...
New Generation of Aerospace Engineers
SSD Course
Phase A : Week 1-7Lecture 1 : Space Mission Concepts, and payload driven operations, Structured Approach to SSD, Space Environment, TestingLecture 2 : Orbit and constellation design, Propulsion Subsystem, Lecture 3 : Spacecraft Structures and Mechanisms, Power and Thermal SubsystemsLecture 4 : Spacecraft Communications; Command and Data Handling Subsystem,Lecture 5 : Spacecraft Attitude Determination and Control Subsystem, Guidance and NavigationSubsystem ElementsLecture 6 : Spacecraft Mission Operations, Ground Support, Launch Systems and LogisticsLecture 7 : Your project evaluations Interim : Week 8 : 2010 Best Design Selection Day.
Phase B : Week 9-14 This portion of the class will be driven by detailed subsystem analysis, verification and proof-of-concept construction with lectures covering a part of the class period.
Education– Spacecraft Systems Engineering
The winner of the 2007 Graduating Class ConceptualSpacecraft Design Contest
Desktop level proof-of-concept Hands-on development
Undergraduate students reach PDR level maturity in their designs
SSD – and the winner is .... 2009-2010
