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CubeSat (ENG491CU1)
Informational Meeting
Get Interdisciplinary
Design Experience
Working on One of the
Worlds Smallest
Satellites
Fall 2005
Presentation Overview
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People Involved
Introduction to CubeSats
Introduction to ION
Semester Priorities and Teams
Class Information
Calendar
Next Steps
People
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Purvesh Thakker
(ECE PhD Student)
Prof. Gary Swenson
(ECE Remote
Sensing)
Prof. Victoria
Coverstone (AE
Orbital Mechanics)
Prof. Matt Frank
(ECE Software)
Systems Team
Program Manager(s) (1-2 Graduate Student TAs)
Faculty Advisors (Remote Sensing,
Orbital Mechanics, and Software)
Attitude Determination
and Control (ADCS)
Team
Ground Station Team
Electrical Team
Mechanical Team
Software Team
Corporate Partners, Electronic Services Shop, External
Faculty Advisors, Machine Shop
Cubesat Satellites
PPOD
3 CubeSats
Cubesat Satellites
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Cubesat Project History.
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Started as collaboration between California Polytechnic State
University (Cal Poly) and Stanford University.
Provides a standard for design of picosatellites.
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Standard cubesat satellite is:
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Provides for common deployer.
Allows for reduced cost and development time.
Lets any individual or organization develop their own satellite.
10 cm cube with mass of 1kg.
Approximately 60 registered Cubesat Teams.
Typically launches provided by Russian company.
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Multiple cubesat’s piggy-back along commercial launch.
6 cubesats were launched Summer 2003.
University of Illinois CubeSat
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Illinois Tiny Satellite
Initiative started in
~August 2001
Various majors (AE, CE,
EE, ME, TAM, CS, GE)
Typically 15 students
involved
Over 100 students
involved to date
Completed ION shown with DNEPR
launch vehicle from Russia’s Kosmotras
University of Illinois Cubesat - ION
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Costs
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Parts/Labor: $30,000 USD.
Launch: $85,000 USD.
Delivered to Cal Poly: April 2005
Launch date: Tentatively November, 2005
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DNEPR launch provided by Kosmotras.
14 cubesat satellites expected launched.
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UIUC, Cornell, Norway, Cal Poly, South Korea, Taiwan, Arizona…
Launch Parameters
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Low Earth Orbit at 650-700 km.
Orbit lifetime 14+ years.
ION Missions
Waves of oxygen airglow
perturbations carried by
wind (760nm)
ION
Thunderstorm
convection
Misssion 2: ION tests
VAT thrusters from
Alameda
Mission 3: ION tests SID
processor board from
Tether Applications
Mountains
Actuator
commands
Sensor
telemetry
Mission 1: ION’s photometer studies dynamic
drivers of the upper mesosphere
Mission 4: ION tests
B/W CMOS camera
Mission 5: ION demonstrates
ground based attitude control
on a CubeSat
ION
Hardware
ION Photos
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Antenna strength along outside
of bagel-shaped pattern
Thruster
(above)
and thruster firing
(below)
Photograph from
CMOS camera
ION’s Earth ground track
Angular Body Rates
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roll
pitch
yaw
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 (deg/sec)
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Torque coil on a
PC board
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Time(hr)
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Photometer with lens
and filter housing
ION Internal Wiring
More ION Photos
ION Software
Environmental Testing
ION vibration test in test
PPOD
Thermal-vacuum chamber
DNPER High level Vibration Test Response Data,
Long Axis
Fall 2005 Priorities
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ION 1
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Prepare Ground Station
Practice, practice, practice communication
Battery charger
Launch and operations?
Publications, tutorials
ION 2
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Prototype power, C&DH internal software
Order and test communication system
Design structure, attitude control system
Define payloads
Fall 2005 Teams
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ION 1 Ground Team: Improve ground communications system, practice
communication
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ION 2 Power Team: Build prototype of design from Summer
ION 2 Command & Data Handling Team: Develop prototype internal
communication software
ION 2 Communications Team: Implement and test communications
hardware including ground station
ION 2 Structures Team: Design the structure of the satellite
ION 2 Attitude Control Team: Design hardware and software for
controlling satellite orientation
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ION 2 Sensors Teams: Develop payloads to support various satellite
missions
Teams – ION 1 Ground Team
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Fix Antenna
Practice communications with satellites
Misc. ground station improvements
Backup stationary antenna
Operate satellite after launch
Develop remote ground stations
Train ground operators
Teams – ION 2 Power
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Solar Panel power point tracking
Battery charger
Satellite sleep mode
System watchdog timer
Voltage, current, and temperature sensors
PIC
Regulators
Switches
Latchup protection
Teams – ION 2 Cmd & Data Hnd.
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Define internal satellite communication
Prototype internal communication bus with PICs
Document internal communication interface
PIC Training documents
PICs
Memory
I2C communication
Packet definition
Memory management
Error and flow control
Prototype Main PC Board
Satellite to ground communication software
Teams – ION 2 Communications
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Design communication system
Select flight and ground hardware
Test and modify hardware as needed
Design and develop antenna
Teams – ION 2 Structures
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Satellite fabrication
Fulfill all Cubesat physical spec requirements.
Design frame, mounts, etc
Switches, data port, separation springs
Removable battery
Epoxies
Solar panel construction
Deployable antenna??
Vibration Testing
Thermal/Vacuum testing
Teams – ION 2 ACS
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Handles all ACS hardware and software
Performs attitude/orbit simulation and analysis
ACS sensors and actuators
ACS processor
Attitude control software
Attitude determination software
Class Meetings
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Weekly Systems Team Meeting
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Poll each team
Discuss activities from previous week
Discuss plans for next week
Announcements, etc.
Occasional special presentations by advisors/faculty.
Lab Hours
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No class “lab hours”
Each team establishes own weekly lab hours
Declare team lab hours team proposal
Log all hours with a brief description of what was done
Class requires ~50 lab hours per credit (per university
guidelines)
Resources
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Course Web Site
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Course Class Drive
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V:\cubesat folder on Cubesat computers
See Training folder
Labs
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http://cubesat.ece.uiuc.edu
206H Talbot
330E Everitt Lab
ECE/Talbot Machine Shops
Tentative Calendar
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Thursday, Aug 25: Informational Meeting
Monday, Aug 29: Meet with TA / Select Teams
Tuesday, Aug 30: First Systems Meeting
Tuesday, Sept 6: Team Proposals
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Tuesday, October 18: Design Review
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Thursday, Dec 8: Final Demo / Documentation
Review
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Team Proposals
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Ten minute presentation for each team
Each team member should discuss their focus
item
Team Members with major, year, credits/hours
Team semester plans
Focus items for each person
Week by week planned schedule
Team weekly lab hours
Handouts
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Getting Started
SSH into Class Drive
Class Registration Form
Registering for CubeSat
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Juniors/Seniors register for Interdisciplinary
Senior Design for 1 to 3 credits
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ENG491CU1 (Fall)
ENG491CU1 (Spring)
Need to have approval form signed to register
(available on Web Site)
Grad students register for Independent Study
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Course number varies by department
Thesis/Master’s Project sometimes possible
Grading
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Based on
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Lab hours
Contributions to team
Participation in systems meetings
Participation in reviews
End of semester activity summary
Success in course depends on your individual
initiative
Next Steps
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Register for class
Sign up for class email list
Meet with TA to identify team
Get access to labs, computer accounts, etc
Become familiar with project
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Read ION paper
Read documentation for your team
Browse available team files on class drive
Establish regular team work sessions
Team proposal due one week after teams established