SM050701-1640 Advanced Optics & Energy Technology Center Advanced Mirror Technology Small Business Innovative Research Sandy Montgomery/SD71 Blue Line

SM050701-1640

Advanced Optics & Energy Technology Center

Advanced Mirror TechnologySmall Business Innovative Research

Sandy Montgomery/SD71

• Blue Line Engineering SBIRs– NAS8-99081

– Fully Active Subscale Telescope (FAST)

– NAS8- 01034

– AI Based, Self-Correcting, Self-Reporting Edge Sensors

• MSFC CDDF– Marshall Optical Control Cluster Computer (MOC3)

SM050701-1640




•Phase II completion date: March 26, 2002•Objectives:

•1/8 Scale model of NGST yardstick •Highly versatile testbed for NASA researchers•Demonstration events in lab and exhibit hall

•Testbed Components•Hinges, latches, actuators, and deployment mechanisms•Seven, 33 cm diameter primary mirror segments•Electronics for static figure correction & maintenance•Motorized Stow/Deploy•Diffraction-limited performance (>2 microns)

Blue Line Engineering NAS8-99081Fully Active Subscale Telescope (FAST)

SM050701-1640




Xinetics . NAS8-98243Large, Cryogenic Ultralightweight Mirror Technology

Optical Design

Aperture: equivalent to 92.5 cm dia. filled circular (0.672 m2)

Obscuration: <10%Stowed: cyclinder 50 cm diam X 100 cm tallPrescription: parabolic, f/1.25, 2.5m focal lengthFOV: >4 arc minutesSegments: hexagonalFTF diameter: 33.3 cmThickness: 1.8 cmMass: < 1 kg/segment

(35 kg total including electronics)Performance: Diffraction limit at 2 µm

(/14 = 143nm ~ 1/4 wave visible)

SM050701-1640




NAS8- 01034AI Based, Self-Correcting, Self-Reporting

Edge Sensors

•Phase I completion date: August 17, 2001•Objective feasibility of enhanced edge sensors

to deploy, align, and phase match the primary mirror segments of space based telescopes

•Design Features•operational env.: 30 °K >T> 370 °K•fuzzy logic

•health & status monitoring •self-reporting

•neural networks •self-correcting•self-tuning.

•new error compensation methods •super accuracy•multi-mode measurements

•phasing•gap

SM050701-1640




Phase Iexperimental testingcomputer simulation and modeling.

In Phase II two standard model edge sensors

developed, fully characterizeddocumented.

SM050701-1640




MSFC CDDFMarshall Optical Control Cluster Computer

(MOC3)

• Project Schedule: FY01 & FY02• Investigators

– PI:John Weir/ED19

– Co-I: Donald Larson/SD71

• Objectives– 103 fold increase in computing capability for managing active primary

mirror segments

– improved techniques for minimizing wave front error.

– experience • parallel computing technologies and software• ground-based computer clusters• embedded clusters in future spacecraft

Beowulf Cluster Computer [after Ridge et al, 1997]

SM050701-1640




Plan:•Purchase a Beowulf computer cluster and associated Linux software. •Utilize the Beowulf in conjunction with optical test beds to develop

• the use of cluster computing for segmented mirror control. • software for astronomy and wave front control, and • application program - distributed computing (e.g. Fortran 99).

•Beowulf Background•technology of clustering Linux computers to form a parallel, virtual supercomputer.

•one server node with client nodes connected together via Ethernet or some other network. •no custom components; mass-market commodity hardware

•PC capable of running Linux, •Ethernet adapters •switches.

•Intiated in 1994 •NASA High Performance Computing and Communications program •Earth and space sciences project at the Goddard Space Flight Center.

•In October of 1996•Gigaflops sustained performance on a space science application for cost under $50K.


(MOC3)

SM050701-1640





(MOC3)

7 Slave Node(s)4U Rackmount ATX Case with 250 Watt UL Power SupplyDual Processor, 1 Ghz Intel Pentium III, 512 MB RAM, 20 GB HDDolphin Interconnect’s Wulfkit

Head Node4U Rackmount ATX Case with 250 Watt UL Power SupplyDual Processor, 1 Ghz Intel Pentium III Dual Processor, 1 Ghz Intel Pentium III, 512 MB RAM, 20 GB HD 32x CD-R/W, SVGA with 32 MB, Tape back-upDolphin Interconnect’s Wulfkit

AccessoriesUPSNetwork SwitchKVM SwitchRackmount Cabinet

Software:Enhanced Red Hat Distribution Linux v 7.0 Portland Group Workstation 3.1 Compilers for CPVM, MPICH, LAM-MPI Communication Libraries ScaLAPACK with ATLAS Libraries Portable Batch System (PBS) Parallel Virtual File System PVFS Doglsed Administration and Monitoring Tool Lesstiff, Mesa (OpenGL), IBM Data Explorer SCA Linda (4 CPUs) MI/NASTRAN for the PC from Macro Industries

“Huinalu”at MHPCC: 260 dual PIII 933 MHz nodes, each

Documents

SM050701-1640 Advanced Optics & Energy Technology Center Advanced Mirror Technology Small Business Innovative Research Sandy Montgomery/SD71 Blue Line