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ALTERNATIVE MECHANICALS
DVA1 Meeting at NSF Arlington VA
April 15-16, 2010
Matt Fleming
Contributions from
Jack WelchRoger SchultzGordon Lacy
KAT7 Mount
DVA1, NSF, Arlington, 2010-04-16 Matt Fleming slide 5 of 27
KAT7BAE (previously IST Dynamics)
CETC54 15m Mount
DVA1, NSF, Arlington, 2010-04-16 Matt Fleming slide 9 of 27
Elevation Part
Azimuth Part
Pedestal
Panel Layout Roger Schultzfor DVA-1
DVA1, NSF, Arlington, 2010-04-16 Matt Fleming slide 12 of 27
Roger Schultz suggests near rectangles at large end
Panels for 3000 Antennas
DVA1, NSF, Arlington, 2010-04-16 Matt Fleming slide 13 of 27
Panels should be designed for max area and container transport
Support structure should be rectangular space frame with nodes allong panel seams
Matt’s suggests throw away pie shape concept and use rectangular panels
Still make use of throuted design for El axis near reflector.
Yes each panel is unique and tooling will be very expensive
Antenna Design Drivers
1 Must achieve survival. ( 100 mph wind )
2 Low cost per unit area of aperture. ( good sky coverage ) ( installed )
( low cost materials, low mass design, low fabrication labor ) ( favors symmetric )
3 Very low operational cost for a 30 year life( very few maintenance visits required )
4 Frequency range of 0.3 to 10 GHz with WBSPF( 3.5m Gregorian secondary ) ( favors offset )
5 Excellent Ae / Tsys.( accurate surfaces, controlled spillover, low diffraction ) ( favors offset )
6 Exceptional dynamic range.( very rigid surfaces, very good pointing, )
pt source sensitivity
survey survey speed
Performance vs Cost
Tradeoffs
DVA1, NSF, Arlington, 2010-04-16 Matt Fleming slide 14 of 43