1. IlliniSat-3 Power Board
Channing Philbrick (ECE)
Michael F. Lembeck, Ph.D. (AE)

2. Laboratory for Advanced Space Systems at Illinois (LASSI)
LASSI supports students, faculty, and other customers utilizing small satellite resources designed, developed, and tested at the
University of Illinois at Urbana-Champaign

3. CubeSat Development History
CapSat
CubeSail
LAICE
LASSI is responsible for five active spacecraft flight programs, which will be delivered for launch in 2019.
SpaceIce
SASSI^2

4. IlliniSat-2 Bus CubeSail LAICE CAPSat SpaceICE SASSI^2 CubeSat Class
2 X 1.5 U 6U 3U
Science
Mission Objective
Ultra-Sail 260 m-long, 20 m2 solar reflecting film ribbon deployment experiment
Atmospheric gravity
wave
studies
Active cooling for CubeSats, quantum annealing, and fine pointing control via solar panel deformation
Freeze-casting experiments to measure solidification velocity, dendrite and wall width, and particle concentration
Spectrometer studies of chemical reactions and chemical species present during re-entry 
Mass
3.5 kg
6.5 kg
2.8 kg
3.4 kg
3.3 kg
Orbit Average Power
13.2 W
24 W
17.3 W
15.6 W
Collaborators
JPL
CU Aerospace
VA Polytechnic
ARC
NSF
Northwestern
Purdue
Sponsor
NASA ELaNa
NASA USIP
Launch
Date
1Q2019
TBD
4Q2018
4Q2019

5. In-house interdisciplinary design, development, and test
LASSI offers off-the-shelf bus components or custom hardware solutions depending on customer needs
Aerospace systems engineering services
Electrical engineering services
Mechanical engineering services
In-house test and operations capabilities
Thermal vacuum chamber
Vacuum bake-out
Sun simulator for solar array testing
Electromagnetic torquer Helmholtz test apparatus
Weight and balance and inertial properties
(Near-by vibration testing facility available on-call)
Ground station, telemetry, tracking, and control

6. IlliniSat-3 Power Board
Multi-semester project initiated last semester to develop power control and distribution board for next generation CubeSat
Basic requirements and initial design completed and documented
Several features not completed, unsuccessfully implemented, or considered out of scope in initial design
Objective for this semester is to understand remaining, scope a subset of it for completion this semester, and provide implementation plan for remaining work
Channing will provide an overview of what has been accomplished and what still needs to be worked out…

7. Power board features Battery management system Power management system
Charging
Status monitoring
Temperature control
Power management system
Hot swap control
7V4, 3V3, 1V2 bus regulation
Control system
TI TMS570 series MCU
CAN bus communication
Watchdog timer
Non-volatile memory

8. Power board features System Component Current Status
Battery Management
Battery charger
Not yet implemented
Status monitoring
Successfully implemented
Power Management
Voltage regulation
First iteration failure
Hot swap controllers
Integration failure
Control Unit
CAN Transceiver
RS422 debug port
Watchdog timer
Non-volatile memory
TMS570 MCU
CAN not implemented