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GLAST Large Area Telescope: Mechanical Systems Peer Review March 27, 2003

This document discusses the requirements, compliance, and changes for the mechanical systems of the GLAST Large Area Telescope. It includes information on key requirements, documentation status, and resulting requirement changes. The current design is expected to be acceptable, with accommodations made for the new environmental loads.

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GLAST Large Area Telescope: Mechanical Systems Peer Review March 27, 2003

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  1. Gamma-ray Large Area Space Telescope GLAST Large Area Telescope: Mechanical Systems Peer Review March 27, 2003 Section 2.1 – Requirements & Compliance Leonard Lee SLAC Systems Engineer lhlee@slac.stanford.edu

  2. Topics Agenda • Requirements flow down • Doc status • Key Requirements & compliance • Requirement changes since dPDR

  3. LAT Requirements Flow-Down

  4. Requirements Flow-Down and Documentation Status X-LAT Design Spec LAT-SS-00xxx-1 LAT Stay-Clear Drawing LAT-DS-00040-5 LAT Envir. Spec LAT-SS-00778-1 10 Feb 2003 LAT Perf Spec LAT-SP-00010-1 31 Aug 2000 X-LAT Plate SCD LAT-DS-01247-1 Radiator Design Spec LAT-SS-00394-1 Mech Systems Subsystem Spec LAT-SS-00115-2 Mid-Plate SCD LAT-DS-01257-1 Subsystem ICD’s Subsystem IDD’s Grid Box Design Spec LAT-SS-00775-1 LAT Thermal Design Param’s LAT-TD-00224-3 Top Flange Heat Pipe SCD LAT-DS-01393-1 Thermal Control Sys. Perf. Spec LAT-SS-00715-1 LAT Dissipated Power Summary LAT-TD-00225-3 LH/RH Down Spout Heat Pipe SCD LAT-DS-01392-1 LAT-DS-01393-1 LAT Instrument Layout Dwg LAT-DS-00038-3 Radiator IDD LAT-DS-01221-1

  5. Requirement Changes since dPDR • The LAT Environmental Specification(LAT-SS-00778-01-D8) is a new requirements document for all subsystems including the LAT Mechanical Systems • Resulting Requirement Change(s) • Grid Box Static-Equivalent Accelerations • Radiator Static-Equivalent Accelerations • Out-of-plane Distortion for the TKR, CAL, ACD & S/C Subsystems to Grid Interfaces • CAL- Grid Interface Loads • Radiator Interface Loads • Grid Box Random Vibration Spectra • Grid Box Temperature Limits • Radiator Temperature Limits • Changes have been accommodated in the design, except Radiator is still evaluating impacts of new environmental loads. The current design is expected to be acceptable.

  6. Key Mechanical Systems Requirements 1 LEGEND Y: Design Compliant, P: Design Partially Compliant, WC: Will Comply, A: Analysis, D: Demonstration, I: Inspection, S: Similarity, T: Test

  7. Key Mechanical Systems Requirements 2 LEGEND Y: Design Compliant, P: Design Partially Compliant, WC: Will Comply, A: Analysis, D: Demonstration, I: Inspection, S: Similarity, T: Test

  8. Key Mechanical Systems Requirements 3 LEGEND Y: Design Compliant, P: Design Partially Compliant, WC: Will Comply, A: Analysis, D: Demonstration, I: Inspection, S: Similarity, T: Test

  9. Key Mechanical Systems Requirements 4 LEGEND Y: Design Compliant, P: Design Partially Compliant, WC: Will Comply, A: Analysis, D: Demonstration, I: Inspection, S: Similarity, T: Test

  10. Key Mechanical Systems Requirements 5 LEGEND Y: Design Compliant, P: Design Partially Compliant, WC: Will Comply, A: Analysis, D: Demonstration, I: Inspection, S: Similarity, T: Test

  11. Key Mechanical Systems Requirements 6 LEGEND Y: Design Compliant, P: Design Partially Compliant, WC: Will Comply, A: Analysis, D: Demonstration, I: Inspection, S: Similarity, T: Test

  12. Key Mechanical Systems Requirements 7 LEGEND Y: Design Compliant, P: Design Partially Compliant, WC: Will Comply, A: Analysis, D: Demonstration, I: Inspection, S: Similarity, T: Test

  13. Key Mechanical Systems Requirements 8 LEGEND Y: Design Compliant, P: Design Partially Compliant, WC: Will Comply, A: Analysis, D: Demonstration, I: Inspection, S: Similarity, T: Test

  14. End of Section 2.1

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