snap integration model v. s14 the snap integration model mechanical [ sc4 breakout ] robin lafever...

SNAP Integration Model V. S14 The SNAP Integration Model

Mechanical [ SC4 Breakout ]

Robin LafeverLBNL Engineering

SNAP Integration Model V. S14 The Model

Main Baffle Assembly

Door Assembly

Solar Array, ‘Sun side’

Secondary MirrorHexapodBonnet

Secondary Metering structure

Primary Mirror

Optical Bench

Instrument Metering Structure

Tertiary Mirror

Fold-Flat Mirror

Spacecraft

Shutter

Instrument Bay

Instrument Radiator

Solar Array, ‘Dark side’

Hi Gain Antenna

Solid-state recorders

ACSCD & HCommPowerData

CCD detectorsNIR detectorsSpectrographFocal Plane guiders Cryo/Particle shield

SNAP Integration Model V. S14 About this Model

The current model has evolved in response to the project design flow. In its present form it

• Provides a real-time snapshot of our combined thinking.

• Becomes a Test-bed for detailed Trade studies.

• Reveals immediate system interactions.

• Brings all subsystems and mission objectives into one, tangible workspace.

SNAP Integration Model V. S14 How it works

Weekly Engineering meetings hosted by Pankow at SSL or Lafever at LBNL.

The Intent:

• All systems are represented.

• Designs and Studies are initiated, teams form, effort goes off-line.

• Results from earlier studies are reported, changes adopted, production goes off-line.

• “Hot” concerns get focused attention first.

The Effect:

• Technical studies get tested as soon as they can be articulated.

• Model updates and studies are iterated on a 1 to 3 week cycle.Detail is sacrificed for speed.

• Detailed studies are iterated on a 1 to 3 week cycle and incorporated into the model. Speed is sacrificed for detail.

• Multiple ‘Fitup’ models can tolerate simultaneous development.

• Integration models can be assembled at any time !

SNAP Integration Model V. S14 System Summary

The current, model-centric view of SNAP system interfaces looks like this:• Michael Levi “The Mission”• Peter Harvey “The Process”• Dave Pankow “The Satellite”• Mike Lampton “The Telescope”• Chris Bebek “The Instrument”• Robin Lafever

John BercovitzBobby Besuner “The Model”

Current Cross-System issues under study• Natalie Roe

Henrik Van Der LippeRobin Lafever Electronics packaging/cabling

• Susanna DeustuaJohn Bercovitz Stray Light and Baffling

• John BercovitzRobin Lafever Shutter mechanisms

• Manfred BesterMike LeviDave Pankow Antennae and Comm

SNAP Integration Model V. S14Recent Studies reflected in this

model

Stray Light/Baffeling:John BercovitzSusanna DeustuaMike Lampton

Shutter Assembly:Chris BebekJohn BercovitzMike LamptonMichael LeviRobin Lafever

Spacecraft:Bobby BesunerDave PankowRobin LafeverMichael Levi

Spectrograph:Robin LafeverEric Prieto

Instrument ElectronicsPackagingNatalie RowHenrik Van Der LippeRobin Lafever

Focal Plane Assembly:Chris BebekJohn BercovitzRobin Lafever

Optical /Thermal Mounts:Mike LamptonRobin LafeverDave Pankow

Baffle Structure/ Metering structure:Dave Pankow Bobby Besuner FEA

SNAP Integration Model V. S14 Deliverables

The ModelsThe Assembly presented here, along with tooling, fiducials, and variations are available as 3d CAD models, and can be exported in a variety of formats. (earlier studies have been carried to NASA-IMDC and back, for example)FEA models are also available

The GraphicsScreen shots, and Hi-res graphics are packaged as Web-available files in a variety of formats that feed directly into ongoing presentations, such as this one.

Engineering modelsLow cost study models are already in the worksMock-ups and study models, and exemplars exist alreadyAnd, John Bercovitz and Chris Bebek have examples of the REAL thing ! A “get yer hands in it !” scale mockup of the Optical Bench, andRapid Prototype detail models are being developed right now.

SNAP Integration Model V. S14 Appendix

Model Overview Cut 1Model Overview Cut 2DoorsTelescope Optical Bench Instrument Bay OpticsInstrument Detail Current Instrument ModelCurrent Focal Plane ModelOpticsReflex Mirror Test set-upReflex InvertedReflex Mirror Cut-away AReflex Mirror Cut-away B Packaging CutawaySatellite Peel-away 01Satellite Peel-away 02Exploded ViewMoving Parts

The collections of graphics in this appendix have been formatted and sequenced so they are ready to paste into other presentations for this Review. Captions have been kept to a minimum to avoid excessive editing by the user.

Raw graphics are also available at:http://www-eng.lbl.gov/~lafever/SNAP/Snap_14/S14_Workup/AAAA.html

SNAP Integration Model V. S14 Model Overview Cut 1

Door and Main Baffle Assembly


Primary Interior Baffling


Body-mounted Solar Arrays

Sun side

Dark side


Optical Telescope Assembly in the

SNAP observatory


Integrated OTA and Instrument package


Spectrograph and Instrument detector assembly

SNAP Integration Model V. S14 Doors

SNAP Integration Model V. S14 Doors

Door opening sequence

SNAP Integration Model V. S14 Packaging Cutaway

Satellite in launch configuration

( MLI not shown )

SNAP Integration Model V. S14 Packaging Cutaway

Interior structure and packaging

SNAP Integration Model V. S14 Instrument Bay Optics

SNAP Integration Model V. S14 Instrument Detail

SNAP Integration Model V. S14 Current Focal Plane Model

Shutter Assembly

Filter Array Detector Array

PC back end electronics

Spectrograph

Incoming, Science light

Transition light

“Dark Inner Cone”

SNAP Integration Model V. S14 Current Instrument Model

Shutter

Cryo/Particle/Light shield

Filter array

CCD / HgCdTl detector array

Cold Plate

Back-end electronics

Spectrograph

Thermal Links

Radiator

Near elactronics

SNAP Integration Model V. S14 Satellite Peel-away 01

Interior cutaway


Main Baffle structure


MLI envelope


Exterior MLI

SNAP Integration Model V. S14 Exploded View

SNAP Integration Model V. S14 Optics

TMA-62 Optics Model

Note:TMA-63 is our current prescription.For this model it is functionally identical to TMA-62.TMA-63 Model is Not-yet-ready-for-Prime-time


TMA-62

Basic Optics components


TMA-62 optics with

Instrument

SNAP Integration Model V. S14 Telescope

TMA-62 Optics integrated with the

Optical Bench and

Instrument Assembly

SNAP Integration Model V. S14 Optical Bench

TMA-62 Optics integrated with the

Optical Bench and

Instrument Assembly

SNAP Integration Model V. S14 Reflex Mirror Test Set-up

Optical components


Optics and Optical Bench


Telescope Engineering test


Satellite end-to-end test

SNAP Integration Model V. S14 Reflex Inverted

SNAP Integration Model V. S14 Reflex Mirror Cut-away A

SNAP Integration Model V. S14 Reflex Mirror Cut-away B

SNAP Integration Model V. S14 Moving Parts

snap integration model v. s14 the snap integration model mechanical [ sc4 breakout ] robin lafever...

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