Team Members Attitude Control System (ACS) OreSat Driver Board › ece › sites › › ... ·...
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Department of Electrical and Computer Engineering Project Statement Design a dual motor driver capable of taking commands from the OreSat Attitude Control and Determination System and translate the command to the respective actuator powered directly from the battery bank OreSat Oregon’s First Satellite Portland State Aerospace Society Attitude Control System (ACS) Driver Board Team Members Andrew Capatina B.S. Computer Engineering Chad Coates B.S. Computer Engineering Armaan Roshani B.S. Computer Engineering Max Schweitzer B.S. Computer Engineering Nathaniel Dusciuc B.S. Electrical Engineering Eric Ruhl B.S. Electrical Engineering, B.S. Physics Key Design Requirements ● Able to communicate over and receive power from the OreSat Backplane ● Minimize power usage while maintaining sufficient torque levels. ● Minimize standby power consumption. ● Adaptable design easily changed to accommodate different operational parameters ● Board layout must accommodate a modular design with a maximum allowable driver system volume of 4 x (50mm) 3 ● Runs from a microcontroller ● Meets or exceeds OreSat Survivability Standards ● Able to implement Phase Vector Control over the BLDC motor driver ● Documentation of operation and source code for system implementation in previous Capstone Projects, including the EFS and eNSR Background and Motivation OreSat is Oregon’s first satellite. For purposes of communication and photography, OreSat will need to point at specific locations on Earth as it orbits overhead. To accomplish this, we will use an ACS consisting of four reaction wheels and three magnetorquers. Four ACS Driver Boards will be the interface between the orientation controller and these actuators. For more information about the OreSat Project, visit oresat.org Board Layout The board layout was developed in conjunction with the mechanical engineer designing the structural mount for the control boards and motors (Fig. 4). The mount also act as thermal sinks which will mate to the large areas of exposed copper at the mounting interface. GitHub Wiki https://github.com/oresat/oresat-acs-board/wiki Figure 3: Layout rev3 (above) Figure 4: Structural Mounting System (below) Figure 2: Development Setup Special Thanks Miles Simpson Help with implementing ChibiOS as well as working with us to maintain code consistency with the rest of OreSat Joe Shields Mounting and structure constraints and design, assisted with final board layout Joshua Lake Control theory and characterization, assisted with development of our design and control paradigm Erin Schmitt Answered conceptual and technical questions about the prior capstone focused on attitude control Andrew Greenberg, our industry advisor Yih-Chyun Jenq, our faculty advisor Figure 1: System Diagram BLDC Motor ACS Driver Board
Transcript of Team Members Attitude Control System (ACS) OreSat Driver Board › ece › sites › › ... ·...
Department of Electrical and Computer Engineering
Project Statement
Design a dual motor driver capable of taking
commands from the OreSat Attitude Control
and Determination System and translate the
command to the respective actuator powered
directly from the battery bank
OreSatOregon’s First Satellite
Portland State
Aerospace Society
Attitude Control System (ACS)
Driver Board
Team MembersAndrew Capatina B.S. Computer Engineering
Chad Coates B.S. Computer Engineering
Armaan Roshani B.S. Computer Engineering
Max Schweitzer B.S. Computer Engineering
Nathaniel Dusciuc B.S. Electrical Engineering
Eric Ruhl B.S. Electrical Engineering,
B.S. Physics
Key Design Requirements
● Able to communicate over and receive
power from the OreSat Backplane
● Minimize power usage while maintaining
sufficient torque levels.
● Minimize standby power consumption.
● Adaptable design easily changed to
accommodate different operational
parameters
● Board layout must accommodate a
modular design with a maximum allowable
driver system volume of 4 x (50mm)3
● Runs from a microcontroller
● Meets or exceeds OreSat Survivability
Standards
● Able to implement Phase Vector Control
over the BLDC motor driver
● Documentation of operation and source
code for system implementation in
previous Capstone Projects, including the
EFS and eNSR
Background and Motivation
OreSat is Oregon’s first satellite. For
purposes of communication and
photography, OreSat will need to point at
specific locations on Earth as it orbits
overhead. To accomplish this, we will use an
ACS consisting of four reaction wheels and
three magnetorquers. Four ACS Driver
Boards will be the interface between the
orientation controller and these actuators.
For more information about the OreSat
Project, visit oresat.org
Board Layout
The board layout was developed in
conjunction with the mechanical
engineer designing the structural
mount for the control boards and
motors (Fig. 4). The mount also act
as thermal sinks which will mate to
the large areas of exposed copper
at the mounting interface.
GitHub Wikihttps://github.com/oresat/oresat-acs-board/wiki
Figure 3: Layout rev3 (above) Figure 4: Structural Mounting System (below)
Figure 2: Development Setup
Special Thanks
Miles Simpson
Help with implementing ChibiOS as well
as working with us to maintain code
consistency with the rest of OreSat
Joe Shields
Mounting and structure constraints and
design, assisted with final board layout
Joshua Lake
Control theory and characterization,
assisted with development of our
design and control paradigm
Erin Schmitt
Answered conceptual and technical
questions about the prior capstone
focused on attitude control
Andrew Greenberg, our industry advisor
Yih-Chyun Jenq, our faculty advisor
Figure 1: System Diagram
BLDC
Motor
ACS Driver
Board
