Structural Requirements - spacecraft-design-lab-2019/documentation GitHub Wiki

Requirements from PocketQube Standard and AlbaPod ICD

Environments from SpaceX Falcon 9 User's Guide

Windform XT 2.0 Datasheet

General

  • PQ-Gen-01: No detatchment of any components throughout entire mission
  • PQ-Gen-02: No pyrotechnics
  • PQ-Gen-03: No toxic, flamable, or potentially hazardous materials (except Li-Ion batteries with protection from thermal runaway)

Materials

  • PQ-Mat-01: any structural material shall be able to withstand all required environmental tests
  • PQ-Mat-02: recommended materials for the baseplate: FR4, aluminum (7075, 6061, 6065, 6082)
    • albaorbital: Baseplate: FR4, aluminum (alochrome or anodized), or Windform
  • PQ-Mat-03: any metallic materials in contact with the deployer and standoffs shall be hard anodized
  • PQ-Mat-04: contact the Launch Service Provider for any other materials not specified in PQ-Mat-02

Out-gassing/ Thermal

  • Must complete a thermal vacuum bakeout to boil off sublimates and derisk out-gassing issues
  • PQ-Gen-04: Out-gassing requirements:
    • TML<=1%
    • CVCM <=0.1%

Vibration

  • albapod: Must complete testing for sinusoidal and random vibration (found in launch vehicle suppliers Payload User Guide)

Dimensions/ Tolerances (1P PocketQube)

  • Dimensions: 50x50x50mm cube with 58x64x1.6mm backplate (see albaorbital reference or PocketQube Standard table 1 and figure 2 in section 2.2)
  • PQ-Mech-02: 51.6+/-0.1mm wide (Y dim in figure 2), 50.0mm + 1.6mm for the backplate thickness
  • PQ-Mech-03: 50.0+/-0.1mm wide (X dim in figure 2), with backplate 58.0+/-0.1mm in the same direction
  • PQ-Mech-04: 50.0+/-0.1mm long (Z dim in figure 2), with backplate 64.0+/-0.1mm in the same direction
  • PQ-Mech-07: rail clamping dimensions shall be 2mm on either side of the backplate (see figures 4 and 5 in the PocketQube Standard)
  • PQ-Mech-08: envelope for components shall be no more than 7mm; appendages and deployables, max 10mm is allowed if Launch Service Providered can adapt (must complete waiver for this)
  • PQ-Mech-09: all deployable must be constrained by the PocketQube and not the deployer
  • PQ-Mech-10: min. contact surface of the PocketQube shall be 21.5mm from both sides on the Z-axis (see figure 6 in the PocketQube Standard)
  • PQ-Mech-11: contact surface between pusher plate or stacked PocketQubes is outlined in figure 7

Mass:

  • PQ-Mass-01: >=250g
  • PQ-Mass-04: center of mass shall not exceed 1 cm from its geometric center in stowed position

Deployables:

  • Must not touch the walls of the AlbaPod

Batteries

  • PQ-Gen-03: Batteries will be protected from thermal runaway