SALT PFIS Preliminary Design Review - PowerPoint PPT Presentation

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SALT PFIS Preliminary Design Review

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Title: SALT PFIS Preliminary Design Review


1
Southern African Large TelescopePrime Focus
Imaging Spectrograph
  • Fabrication and Test Plan
  • Jeffrey W Percival
  • University of Wisconsin - Madison

2
Facilities
  • UW Dept. of Astronomy resources
  • Machinist
  • 3 Electronics Technicians,1 with spaceflight
    qualifications
  • Well-equipped machine shop
  • Class 1K clean room with 2 class 10 flow tents
    and 1 laminar flow bench
  • Thermal chamber covers all SALT operating and
    survival ranges in temperature - sized for
    actuators and mechanisms, not structure
  • Available from UW Physics Dept
  • 6-person machine shop, accepts any size job
  • Available from Rutgers University
  • Large machine shop with invar welding

3
Fabrication and Test Strategy
  • Mitigate large number of mechanisms with
    pipeline
  • Standard bench setups for acceptance testing of
    actuators
  • Test mechanisms as they come out of fabrication
  • Rapidly prototype software modules, use early
    experience to feed back into design
  • High degree of commonality allows a few standard
    modules to be reused over and over
  • Simulate missing components to allow high-level
    controls to be prototyped and used

4
Test Procedures
  • Testing will be required throughout program
  • Bench-level testing of components
  • Assembly-level testing
  • Instrument-level testing
  • Pre-ship functional
  • Acceptance testing in Cape Town
  • Complete functional testing in Sutherland
  • Procedures will be developed incrementally
  • Procedures will embody experience gained during
    fabrication

5
Documentation
  • Documentation will include
  • User manual
  • Troubleshooting guide
  • Software source code
  • Test procedure scripts
  • Mechanical drawings
  • Wiring diagrams and lists
  • Vendors material for purchased items

6
Interfaces Detector Telescope
  • Detector and telescope services will be provided
    according to an interface using LabVIEW network
    protocols
  • Very important early design, rapid prototyping,
    nail down the ICDs.
  • Simulation mode is critical - support protocols
    before actually providing services
  • Test software modes long before integration of
    hardware
  • Frequent incremental exchanges of software
    simulators
  • Intercontinental testing of network modules
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