PROGRESS
REPORT March 29 – April 28, 2000
Accomplishments
/ Status
Summary: Overall, 20% of the work from the Restart Review to delivery has been completed. The primary focus of this reporting period has been 1) the solid model design/analysis of the Post-Slit, Pre-Slit, and OIWFS Optical Benches, 2) the risk reduction testing of the Linear and Rotary drive and the Optical Mount prototypes, and 3) the design of camera barrels, Filter Wheel, and Environmental Cover mechanisms.
Next Milestone: The Pre-Fabrication Review is the next
major project milestone, scheduled for May 11-12.
Earned Value:
BCWS $383,515 SPI 1.45
BCWP $554,930 CPI 1.81
ACWP $306,474
Project Management: (26% completed) A summary task schedule is attached to this report, which shows percent complete on all tasks in work. Overall, the project is 20% complete. The summary schedule can also be viewed on the GNIRS web site at: http://www.noao.edu/ets/gnirs/ under Planning. The project schedule is currently being revised to reflect changes in optical bench design configuration. This update will be presented at the Pre-Fabrication Review.
Systems Engineering: (70%) The activities in work are 1) thermal analysis, 2) structural analysis, 3) linear prototype, 4) rotary prototype, 5) optical mount prototype, and 6) two new bearing test fixtures.
The thermal and structural analyses are 42% and 32% complete overall, respectively. These tasks are being done in conjunction with the bench designs, and will complete to a satisfactory level by the May 11 Pre-Fabrication Review.
The Optical Mount Prototype is complete. The Linear Mechanism Prototype is in warm bench test. The Rotary Mechanism Prototype has completed warm testing and is in cold test. Two Bearing test prototypes have are in 2D detail design.
Mechanical Design and Fabrication: (8%) The 3D solid model design of the Wavefront Sensor Bench assembly is 76% complete. The 3D solid model design of the Post-Slit Optical bench is 76% complete. The 3D solid model design of the Pre-Slit Bench is 50% complete. The 3D solid model design of the Collimator Mount and Cover Box are 79% and 76% complete. All of these designs are being worked concurrently with the structural analysis.
The 3D design of the Short Red and Short Blue Camera Barrels are 95% complete. The 2D drafting of these camera barrels is 95% and 15% complete, respectively. Work has started on the Long Red and Blue camera barrels and the 3D design of these components is approximately 20% complete.
The 3D solid model design of the Filter Wheel Assembly mechanism is 45% complete.
The 3D solid model design of the Environmental Cover Assembly is 100% complete, and the 2D drafting is 95% complete.
The Acquisition Mirror mechanism solid model design is 95% complete, and the 2D drafting is 7% complete.
The Motor Drive Assembly solid model design is 100% complete, and the 2D drafting is 85% complete.
No fabrication is being done at this time. Several items will be released to fabrication after the Pre-Fabrication Review.
Electronics Design: (0%) No activity has occurred on this work package. The EE, Jerry Penegor, visited Hilo (March 29-31) and was briefed on the total electronics work package by Andy Rudeen (the former GNIRS EE), who now works at Keck. He is in he process of reviewing his work package and will start work on the hardware in May.
Software Development: (26%) The Components Controller Software is 50% complete. The Software plan is complete and will be presented at the Pre-Fabrication Review.
Procurement: (23%) Major activities in this Work Package included optics work at RMI (50% complete) and at II-VI (90% complete). Inspection of the optics at II-VI occurred as scheduled for March 31st. An inspection of lens optics is scheduled for mid-May.
Problems /
Solutions
Systems Engineering: The bearing test prototypes will not be completed by the Pre-Fabrication Review but are not critical to the mechanism design effort. The results of these tests will be reported when completed.
Bench Design: The 3D solid model designs and analyses of the benches are the pacing items in meeting the criteria for the Pre-Fabrication Review on the scheduled date.
Key Personnel
No changes. We have hired an EE intern graduate student to assist Jerry Penegor over the summer.
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If you have any questions or suggestions regarding this website, please contact
Melissa Bowersock.
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National Optical Astronomy Observatories,
950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726,
Phone: (520) 318-8000, Fax: (520) 318-8360