ELECTRON LOSSES AND FIELDS INVESTIGATION U.S. AIR FORCE. Ground Support Equipment Mission PDR. Michael Anderson

Transcription

1 ELECTRON LOSSES AND FIELDS INVESTIGATION Ground Support Equipment Mission PDR Michael Anderson Los Angeles, California February 12,

2 GSE AGENDA Major Campaigns to Support Notable Requirements GSE-Spacecraft Interface GSE Practices Specific I&T GSE 2

3 SUPPORTING ELFIN EVERY STEP OF THE WAY 3

4 MAJOR CAMPAIGNS TO SUPPORT 1. Full Development Model Tests 2. Mass Model Vibration 3. Instrument-Level Qualification TVAC 4. Internal Power Deployment Tests 5. EM Qualification TVAC 6. EM Qualification Vibe 7. Instrument-Level Acceptance TVAC 8. FM Acceptance Vibe 9. FM Acceptance TVAC... And all intermediate assembly efforts! 4

5 NOTABLE REQUIREMENTS Notable EGSE Requirements: Covered at Systems Requirements Review REQ ID Requirement Rationale Parent(s) Verification Method GSE 04 GSE 06 GSE 07 Electrical Ground Support Equipment shall be capable of supporting functional testing of the satellite, including subsystem level and full day in the life testing. Electrical Ground Support Equipment shall be capable of command and control of the satellite without free radiation of RF energy. Electrical Ground Support Equipment shall be capable of command and control of the satellite through radios and RF. Modifications in Future: For verifying functional requirements For functionaility tests involving magnetic cleanliness For testing communications functionaility UNP NS8 Userguide_IR (UNP I: by design 16) UNP NS8 Userguide_IR (UNP I: by design 18) UNP NS8 Userguide_IR (UNP I: by design 19) Better definition of MGSE requirements, apply magnetic requirements Add EGSE requirements for thermocouples 5

6 EGSE-SPACECRAFT INTERFACE 32 pins required for EGSE-Spacecraft interface: 8 pins: FCPCBs (Remove Access Cable) 2 pins: SBPCB1 SI-5 2 pins: SBPCB2 SI-5 4 pins: FCPCB MM I2C 4 pins: PPCB MM I2C 2 pins: IDPU GPIO 8 pins: BATT direct connections 2 pins: Inhibit actuation Micro-D connector of TBD size Comes in 37, 51, 100 pin configuration 1 UART line to FCPCB, 1 to Radio Radio bypass to satisfy GSE-06 6

7 ELECTRICAL GSE GSE PRACTICES Safe-to-mates part of all relevant test procedures Breakpoints in major GSE cabling to support TVAC and other tests Time allocated in schedule for bakeout of TVAC EGSE REQ ID Requirement Rationale Parent(s) Verification Method GSE 23 All Electrical Ground Support Equipment connectors that interface with flight hardware shall be designed, built, and controlled in a manner commensurate Keep EGSE at with flight hardware with the exception of similar quality of cleanliness and, therefore, shall meet applicable flight hardware requirements for configuration control, quality to protect the assurance, parts & materials, etc. flight hardware UNP NS8 Userguide_IR (UNP I: by design 35) 7

8 GSE PRACTICES MECHANICAL GSE MGSE support structures must be vacuum safe To be machined out of aluminum, Delrin, or PEEK Protective covers for all instruments, optical sensors Modeling tools in SolidWorks before assembly procedures attempted Verify assembly order is viable MGSE to be colored or anodized red whenever possible 8

9 SPECIFIC I&T GSE Simulated Sunlight Basic light sources for functional testing Potential performance testing in solar simulator at Aerospace Corporation RF Dummy Load Radio testing with limited radiated power 9

10 SPECIFIC I&T GSE P-POD analog borrowed from Cal Poly Fit checks of engineering, flight models Fixture for vehicle vibration campaigns 10

11 SPECIFIC I&T GSE Vehicle assembly to be conducted on sled Separate grounding cable rather than passively grounding through sled; desirable for functional checks of EPD Roll cage attachment for movement, accessing different sides 11

12 SPECIFIC I&T GSE Stacer Cradle Assembly Stacer not designed to support itself horizontally except in orbit EPD Aperture Covers General covers for protection Separate covers to contain isotope sources for calibration in TVAC FGM Cover Stowed FGM to be covered with vacuum-safe plate when not in use Solar Panel Covers Secured above panels to protect cells without being in direct contact with cell coverglass Bonus Volume Cover Secured to roll cage to protect stowed antennas 12

13 ACKNOWLEDGEMENTS Thank you to all of our sponsors, stakeholders, and contributors Shaun Northrop Grumman Katharine UT Austin Jim White Colorado Satellite Services Mark Spencer ARRL Tony Monteiro AA2TX & Bob Davis AMSAT-NA 13

14 Questions? 14