MVP-A Update: Week of 18, 2019

Due to camera operation difficulties, the lab had to decide whether to redesign a new satellite configuration or continue troubleshooting with our current design. General consensus seems to be leaning towards the newer configuration with 1 less camera and 1 more solar panel. The advantages and disadvantages of Configurations 1 and 2 can be found in a document titled “DesignDecisionTable” under the MVP-A folder in the SSRL OneDrive.

DORRE

  • Weekly telecons will continue to take place on Wednesdays from 1-2pm.. These will be an educational opportunity to learn and get advice from a variety of professionals in the field. This week we will be discussing “Risk Management/Mission Assurance”

MVP-A Update: Week of February 11, 2019

General

  • There will be a Keith meeting on Monday, Feb. 18 at 8 a.m. for the Ground Ops, I&T, and CDH teams

  • Due to some circuit board issues, the Engineering Build Testing time in Week 11 will be cut short

  • Remember to record any potential risks and foreseeable problems to the Risk Analysis Catalog

DORRE

  • Weekly telecons will continue to take place on Wednesdays from 1-2pm.. These will be an educational opportunity to learn and get advice from a variety of professionals in the field. This week we will be discussing Systems Engineering Pt. 2

Ground Operations

  • We are able to listen to the ISS and a few other satellites with the radio

  • The TV display in the IT room is in progress

  • Interface software for the radio needs to be written

Integration and Testing

  • Flat-sat assembly is in progress

  • Procedure codes have been finished and need to be organized

  • Remember to continue using safety equipment and procedures in the clean room

Command and Data Handling

  • Microservices are being integrated into ARES to make a flat-sat version for testing

Communications

  • Radio is functional

  • Python documentation needs to be sent to Keith sometime in the future

Structures

  • The side panels are currently being anodized and will be blue

  • The team will continue working on the ODAR, the IDD, and the BoM

Systems

  • The camera is presenting some issues involving not turning off when not active and not drawing a lot of quiescent power. There are 3 plans being enacted simultaneously:

    • Finding a new camera that draws less quiescent power

    • Fixing the connections to the current camera

    • Ordering new connection boards

MVP-A Update: Week of February 4, 2019

General

  • There will be no CDR to allow for a longer testing period

  • Remember to record any potential risks and foreseeable problems to the Risk Analysis Catalog

  • The MVP-A mission patch has been decided! We will be getting shirts, patches, and stickers with this design

DORRE

  • Weekly telecons will continue to take place on Wednesdays from 1-2pm.. These will be an educational opportunity to learn and get advice from a variety of professionals in the field. This week we will be discussing System Concept Reviews

Ground Operations

  • The antenna has been roughly callibrated

  • The telemetry requirements for hardware elements of the satellite is up to date in the telemetry packets

Integration and Testing

  • The general draft for the flat-sat assembly design done and ready to progress. We will not be testing with the EPS or connection board as of right now

  • Remember to continue using safety equipment and procedures in the clean room

Command and Data Handling

  • The payload software (as a package within ARES) will have a rolling delivery throughout launch

Communications

  • Python code for radio transmission has been written

Structures

  • The last revision of the payload bay is ready

  • The team will now move onto working on reviewing the ODAR, reviewing the IDD, creating a BoM, and finshing the design and manufacturing of side panels

Systems

  • The team has been making progress on finishing the connection board. This will need to be finalized by Monday

MVP-A Mission Patch

MVP-A Update: Week of January 28, 2019

SUMMER INTERNSHIPS AVAILABLE - Application due to Dr. Swartwout on Friday, Feb. 8th

  • DORRE positions

  • MVP-A positions

  • Position with NASA Ames Research Center

  • See Dr. Swartwout’s email for more information!

DORRE

  • Weekly telecons will take place on Wednesdays from 1-2pm from now on. These will be an educational opportunity to learn and get advice from a variety of professionals in the field

Ground Operations

  • The antenna and cables are fixed and back up after a mechanical failure during calibration last week

  • The ARES ground node has been designed and is ready to be developed

Integration and Testing

  • The flat-sat assembly design is done and ready for assembly. This will be started by Feb. 12th at the latest

  • We must use safety equipment and procedures in the clean room from this point on

Command and Data Handling

  • The flat-sat software must be done soon. This package will include a way for the flat-sat data to be processed within ARES

Flight Dynamics

  • The team has successfully accomplished all their critical objectives for this mission so they have been dissolved and the members have to been reassigned to the Communications team

Communications

  • The team has gained new members! They will start working on learning Python and programming the transceiver

  • The transceiver can beacon so the next step is to test the receiving capabilities

Structures

  • The 3D print for the payload is printed

  • A new CAD model is needed to incorporate the thinner EPS design

Systems

  • The team has started the risk management documentation

MVP-A Advances

This week, the team made some significant advances in MVP-A development.

Sam Carlowicz completed the first revision of the MVP-A spacecraft CAD model and worked out how to create cable harnesses in PTC Creo, something previously poorly done. This will allow the team to analyze where their wire harnesses will go before integration and allow for the identification of risks and problems before manufacture of wire harnesses.

MVP-A CAD Revision B

MVP-A CAD Revision B

Brendan McGreal was successful in his attempts to create a power relay switched by a MOSFET. This breakthrough in our capability will allow SSRL to individually power on and off different sensors to improve power management.

High school interns Audrey and Emily officially started this week and got right to work on inspecting the UHF and VHF communication systems to identify weathering and other needed repairs. They will be running an azimuth and elevation motor control verification test in the near future before moving on to Thermal Vacuum Chamber tests and setting up a remote communications station.

Thermal Vacuum Chamber Updates

On June 7th, the Space Systems Research Lab Summer Team attended a training session on the newly remodeled Thermal Vacuum Chamber (T-Vac). Krzysztof Bzydk (2018 M.S. Aerospace Engineering) worked on updating the T-Vac for his master's project. The new capabilities include point source heating elements to simulate solar radiation effects, a removable shroud to hang test articles, x4 IR Thermal Sensors, a digital control interface, a switched power interface, and detailed operations and maintenance procedures. Krzysztof will be heading off to NASA's Glenn Research Center in Cleveland, Ohio to work propulsion for the Orion spacecraft. We are appreciative of his work with SSRL and wish him the best. 

Bzydk explains updates to SSRL's summer team. 

Bzydk explains updates to SSRL's summer team. 

Aurora Launch Scheduling Change

Due to scheduling complications, the launch of SLU-05 (AURORA) is being postponed. The new launch date is being discussed, but it will launch no earlier than August of 2019. In the meantime, members of the lab will be constructing MVP-1, a smaller satellite that will be launched within the following 12 months. This satellite will be 1/3 the size of AURORA and will allow our engineers to continue building on skills necessary to improve the efficiency of future satellites.

Morris Teaches Students to Fly with Autodesk's Eagle

Morris_Teaching_Session1.JPG

One week after Matthew Boss's successful teaching session on electrical engineering, Program Manager Connor Morris took the lab's new members through an overview of Autodesk's Eagle program. Eagle allows its user to design and produce circuit boards, which is extremely useful in the development of a CubeSat. Morris led the students through the design of a simple circuit board, with each student following along on their own laptops through the process. After finishing their boards, Morris then discussed examples of Eagle's use in the lab and its importance in the design of well-made spacecraft. 

Introduction to Electrical Engineering Teaching Session a Success

Boss_Teaching_Session1.JPG

At the beginning of October, senior electrical engineer Matthew Boss led a group of new lab members through a presentation about the basics of electrical engineering. Boss introduced the students to basic circuit theory, Kirchoff's Laws, and the appropriate applications of each. He then led the students through examples and practice problems to help those present gain a better appreciation of the importance of electrical engineering in the design of a spacecraft.

Copper Rascal Preliminary Design Review...

Recently, the team leads of our laboratory have decided to postpone the preliminary design review of the most recent project, Copper Rascal. The preliminary design review is a time for our design concepts to be critiqued by satellite development experts. We want the most relevant and meaningful critiques possible in order to ensure the best final satellite design. By postponing the preliminary design review, we are allowing teams more time to refine their plans for more time, a crucial step to furthering the development of our current plans.

A major aspect of the design that is still being debated is the attitude determination and control, or ADC. The ADC determines which approach we take to pointing the satellite in the proper direction. For this mission, that proper direction is downward facing. Currently, team leads are considering the use of permanent magnets, magnetorquers or gravity gradient booms for the ADC method. Fistly, the magnetic method is known as a "passive" system, because it doesn't consume any electricity and is a fairly common and easy-to-implement system. The two main drawbacks to this system are the facts that it only allows for two-axis control, and that due to the sun-synchronous orbit the magnetic field would turn the satellite at a relatively slow speed. Magnetorquers are very similar to the previous approach, except that instead of permanent magnets, we'd use a series of electromagnets that we could turn on or off, allowing for three-axis control, and avoid the flipping issue. One the other hand, this is an active system, meaning that we can control it from the ground but it consumes quite a substantial amount of electricity. Finally, gravity gradient booms are another passive method, except for the initial deployment, with reasonable calculations for precision. The disadvantage of this method is that it would be harder and expensive for us to build, due to its many vulnerable moving parts that are prone to breaking. The new preliminary design review date on is November 20th, and by then we are projected to have established our ADC as well as countless other aspects of the preliminary design.