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Final Report- Mechanical - PowerPoint PPT Presentation


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APS Formation Sensor MECHANICAL DESIGN Rodger Farley 15 March 2002 Requirements Survive launch loads, of course. Once on orbit, to keep the 6 optics stable relative to each other to

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aps formation sensor

APS Formation Sensor

MECHANICAL DESIGN

Rodger Farley

15 March 2002

requirements
Requirements

Survive launch loads, of course.

Once on orbit, to keep the 6 optics stable relative to each other to

10 microns. With an aluminum housing, this translates to keeping the temperature steady to ~ 0.25 deg C.

Provide re-closable lid

Provide 3 element filter wheel and unfiltered path, not particularly sensitive to positional placement or repeatability. Agility of the wheel is not yet specified.

design elements modules
Design Elements, Modules

Total Mass ~

  • Front Baffle Module
    • Baffle
    • Re-closable lid
    • Light ring
  • Telescope Tube Module
    • Outer tube, with proportional heater system
    • 2 optics sub modules
  • Isolation adapter module
    • Titanium thermal isolation housing
    • Filter wheel mechanism
  • Detector / camera module
  • Flexured base plate
front baffle module
Front Baffle Module
  • Baffle
  • Motorized lid with labyrinth edge, ‘spectralon’ surface on lid back
  • Ring of lights
telescope tube module
Telescope Tube Module
  • Aluminum tube for good thermal conductivity, minimize gradients
  • Temperature controlled to room temp +/- 0.25 deg C with proportional thermal control system of heaters and sensors.
  • Optics aluminum sub modules with bonded glass elements on triangular shaped flexure blades.
  • Optical elements in sub modules are pre-metered for ease of integration, and have registration pads that can be lapped.
  • Sub modules are ‘muzzle loaded’ into the outer tube, and preloaded with compliance using a wave ring washer and threaded ring. The sub modules bear against their own registration pads and the outer tube registration surfaces.
isolation adaptor module
Isolation Adaptor Module
  • Titanium housing, flexured from the telescope tube module
  • Filter wheel with 4 elements (one blank)
    • D.C. brushless motor with encoder
flexured base plate
Flexured Base Plate
  • Titanium flexures
  • Honeycomb plate
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