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HA1L High Altitude 1U Laboratory. University of Michigan Tom Heine Ted Lorts Hrishikesh Shelar. Mission Overview:. HA1L ’ s mission is to serve as a test of Michigan ’ s next core CubeSat bus technology.

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Ha1l high altitude 1u laboratory

HA1LHigh Altitude 1U Laboratory

University of Michigan

Tom Heine

Ted Lorts

HrishikeshShelar


Mission Overview:

  • HA1L’s mission is to serve as a test of Michigan’s next core CubeSat bus technology.

  • The central avionics of CADRE are included on HA1L. We will demonstrate the following capabilities:

  • Software modes

  • Sensor and health checkouts

  • Solar cells charging batteries

  • UHF commanding and file transfer

  • Beaconing and GPS tracking

  • Watchdog-triggered reset

  • Post-processed attitude determination



HA1L/CADRE Connection:

CADRE

HA1L

  • - 1U version of CADRE structure

  • (room added for pass-through tube)

  • Foam box for protection, thermal insulation, and

  • mounting peripheral modules

  • 3U structure designed in-house

  • Deployable panels and antennas

STR

  • FCPU board commands

  • over standardized harnesses

CDH

  • FCPU board commands

  • over standardized harnesses

  • UHF beacon/commanding

  • Beacon will contain realtime telemetry

  • UHF beacon/commanding

  • S-band for data downlink

COM

  • Post-processed determination: 5˚

  • 4 course sun sensors, GPS, 4 magnetometers,

  • 3-axis gyroscope

  • Live control: 2˚ of ram (3 reaction wheels)

  • Post-processed determination: 0.2˚ of ram

  • 2 fine digital sun sensors, 1 star tracker, IMU,

  • magnetometers, dual frequency GPS

ADCS

  • 2 strings of 2 cells

  • Boost-buck regulated 3.3 V, 5 V, and 7.2 V lines

  • 2 3,100 mAhr Li-ion batteries

  • 8 strings of 4 cells, 4 strings of 7 cells

  • Boost-buck regulated 3.3 V, 5 V, and 7.2 V lines

  • 4 3,100 mAhr Li-ion batteries

EPS



HA1L Design:

HA1L’s avionics consist of CADRE’s first revision circuit boards which will be the majority of the satellite’s 3rd U.

The boards are attached together by hex standoffs, which allow the board stack to be removed entirely from the structure.


HA1L Design:

  • HA1L has 5 flight boards

  • CDH

    • FCPU (Stamp 9G20)

    • UHF radio

    • Watchdog timer (MSP430)

  • ADCS

    • Peripheral sensor modules, GPS

  • Battery Board

    • Bus power line regulators

    • Li-Ion batteries

  • Solar Board

    • Buck-boost regulator

  • -Z Interface Board

    • Connections to solar cells



SHOT II Test Details:

- Discuss your test program for you SHOT II design

- Prove your project is ready for flight

- Show test data (graphs, charts, etc) that are labeled, with key events indicated

- Structural tests should be included but equal time should be devoted to mission/science tests (present mission/science test first)

- Proof should be shown that you have actually recorded, off-loaded, and analyzed your data


SHOT II Test Details:

Subsystem functionality was tested throughout board population

Board-to-board tests were concurrent with assembly

Full integrated system test included Conops and individual subsystem performance checks

Test Assembly Document and System Level Test Procedures document capture assembly and test procedures

29 integrated system tests to verify requirements

Basic Test Summary


HA1L Integration and Test Highlights

HA1L Integration Bench

HA1L Whip Test


HA1L RF Spectrum Results:

437MHz Spectrum(MU S&T, StL U)

HA1L 437MHz Spectrum

0-50kHz(MIT)

*additional spectra in backup slides




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