Date post: | 05-Jan-2016 |
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After considerable pushing and shoving, this configuration show some promise.
I have taken some liberties with the geometry and turned mounts inside-out from earlier versions.
Long Primary struts
Fold-Flat mounts on both sides
FIDO face mounts
Tertiary edge mountsQuad “Butterfly” Filter Pack
Long Primary struts
Hard Points Lined up along common axes
All mounts have 6 point mounts to the Optical element,3 point mounts to the structural element
Face and Edge mounted Optical elements
Ignore the HexapodA Newer better actuator is on the way
The Yellow elements areEnvelopes that defineLoad paths and vertexes
When their positions settle down, real hardware will be inserted
Yellow Envelopes also define Fiducials and reference planes, the CAD equivalent of GSE( Ignore them )
CFRP Triangular Beams
Quad “Butterfly” Filter/Shutter Package
The 3 beams pick up all Optical mountsTertiaryFoldFlatFIDO and Quad Filter assemblyCosmic Ray ShieldCryostat
CFRP Shear panels and Bulkhead “Candybox”
Note Filter housing
Candybox Interface occursAt or near Primary hard points
CFRP Triangular Beam Assembly
CFRP webbed pan integrated onto the Beam assembly
Top face is not shown
Spacecraft structure picks up OTAAt three points on a hard ring
This surface forms the platform for the Secondary Assembly
This surface forms the platform for the Baffle and Solar array
This approach works for most of our earlier metering concepts
Solves some of the 3x vs 4x symmetry problems
3-Vane ,Trapezoid section
This approach works for most of our earlier metering concepts
Solves some of the 3x vs 4x symmetry problems
6-strut, tubular section, Full-length
4-Vane ,Trapezoid sectionThis approach works for most of our earlier metering concepts
Solves some of the 3x vs 4x symmetry problems
Shown here is a 4-Vane (trapezoidal cross-section) secondary metering structureOn a spacer ring
This configuration allows us to tune the resonant frequency of the strut by adjusting the spacer height
The build-up sequence looks like this from the bottom
“Candybox” Beam Assembly
Primary Bench Beam assembly
Primary Benchintegrated
1 of 3 points that index the Primary Bench to the Candybox
Candybox Indexed to Primary Bench beams
Candybox
Primary Bench
25dm Baffle Assembly
Envelope for Baffle structure, MLIAnd Solar Array
Note that the hard Ring is Lower than earlier versions
6 strut assembly3 point mount at OTA,6 point mount and S/C pan
THE FITUP looks like this….
25dm Baffle
Support structure and MLI not shown
Solar Array
Spacecraft structure
VOILA !
No obvious interferences.
Plenty of room for FIDO electronicsclose to the detector.
Tuneable secondary structure
Room for FIDO radiator.
Thermal and kinematic isolation between Baffles, Spacecraft, and OTAseems doable
Really lousy interface between the ‘Candy box’ and the Primary bench
So………
Here it is in rough form.
My immediate question is:
Can these radical mounts be made to work ? Have I violated good-practice conventions, or overlooked something?
If this works for you, the next thing to do is to integrate it with the current Baffle, and the Current Secondary structure.
Details for the mount geometry
Are previewed on the following pages.
CAD files are available in several formats
At: http://www-eng.lbl.gov/~lafever/SNAP/Snap_13/
Details and True-Length dimensions for
FIDO
Dimensioned CAD versions of this file are also available in several formats: .pdf, .mi, and .dxfAt: http://www-eng.lbl.gov/~lafever/SNAP/Snap_13/
Details and True-Length dimensions for
FoldFlat
Dimensioned CAD versions of this file are also available in several formats: .pdf, .mi, and .dxfAt: http://www-eng.lbl.gov/~lafever/SNAP/Snap_13/
Details and True-Length dimensions for
Primary
Dimensioned CAD versions of this file are also available in several formats: .pdf, .mi, and .dxfAt: http://www-eng.lbl.gov/~lafever/SNAP/Snap_13/
Details and True-Length dimensions for
Tertiary
Dimensioned CAD versions of this file are also available in several formats: .pdf, .mi, and .dxfAt: http://www-eng.lbl.gov/~lafever/SNAP/Snap_13/
Dimensioned CAD versions of this file are also available in several formats: .pdf, .mi, and .dxfAt: http://www-eng.lbl.gov/~lafever/SNAP/Snap_13/
Dimensioned CAD versions of this file are also available in several formats: .pdf, .mi, and .dxfAt: http://www-eng.lbl.gov/~lafever/SNAP/Snap_13/
Dimensioned CAD versions of this file are also available in several formats: .pdf, .mi, and .dxfAt: http://www-eng.lbl.gov/~lafever/SNAP/Snap_13/
Dimensioned CAD versions of this file are also available in several formats: .pdf, .mi, and .dxfAt: http://www-eng.lbl.gov/~lafever/SNAP/Snap_13/