PROGRESS REPORT

March 2000

Accomplishments / Status

Summary: Overall, 14% 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)Fabrication and testing of the Linear and Rotary drive prototypes, and testing of the Optical Mount prototype, and

3)3D and 2D design of two camera barrels, Filter Wheel, Acquisition Mirror, and Environmental Cover mechanisms.

Next Milestone: Pre-Fabrication Review, currently scheduled for May 11-12.

Earned Value:

BCWS$383,515SPI1.39

BCWP$533,619CPI2.00

ACWP$267,393

Project Management: (23% completed) A summary task schedule is attached to this report, which shows percent complete on all tasks in work. Overall, the project is 14% 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: (60%) 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 16% and 4% complete overall, respectively. The bench deflection analysis component of the structural analysis is 25% complete. These tasks are being done in conjunction with the bench designs, and will be complete to a satisfactory level by the May 11 Pre-Fabrication Review.

The Optical Mount Prototype is complete. The Linear Mechanism Prototype fabrication is complete and the unit is in bench assembly/test. The Rotary Mechanism Prototype fabrication unit is in assembly/test. In addition, two new bearing test prototypes have been started, and are currently in 3D solid model design.

Mechanical Design and Fabrication: (6%) The 3D solid model design of the Wavefront Sensor Bench assembly is revised downward to 76% complete. This was formerly reported as being 95% complete.This revision is due to the redesign necessary to interface it to the Post-Slit Optical Bench.

The 3D solid model design of the Post-Slit (formerly Spectrograph) Optical Bench is 76% complete.This bench has undergone considerable redesign and is also being analyzed concurrently with the 3D design effort.

The 3D solid model design of the Pre-Slit (formerly Fore-Optics Module) Bench is revised to 50% complete.This bench consists of the Offner and Pick-Off Mirror assemblies.

The 3D solid model design of the Collimator Mount and Cover Box (formerly Collimator Assembly) are 79% and 76% complete.These components are now considered part of the overall cold-bench assembly.

The 3D design of the short red and short blue camera barrels are 95% complete.The 2D drafting of these camera barrels is 80% and 9% complete, respectively.

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 75% 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.

The only fabrication being done at this time is in support of the prototyping effort. All prototype fabrication should be completed by mid-April.

Electronics Design: (0%) No activity has occurred on this work package. Work on these tasks is scheduled to start in April. The new EE, Jerry Penegor, is in Hilo March 29-31 being briefed on the total electronics work package by Andy Rudeen, who now works at Keck.

Software Development: (14%) The Components Controller Software is 30% complete.The software plan draft is 100% complete and awaiting review. This plan will be presented at the May 11 Pre-Fabrication Review.

Procurement: (6%) Major activities included vendor fabrication for the mechanism prototypes and optics procurement. Vendor fabrication for the linear and rotary prototype parts is 100% complete. The optics work at RMI is 50% complete, and at II-VI is 70% complete, with all optics 30% complete overall.Inspection of the optics at II-VI has been rescheduled for March 31.

Problems / Solutions

Although not yet a problem, there are two schedule risks:

Systems Engineering:Two new bearing test prototypes are being built to test the feasibility of using load adjusting tapered bearings in the rotary mechanisms. This work will be accomplished in April and the results will be presented along with the other Risk Reduction results.

Bench Design:The 3D solid model designs and analyses of the benches are the pacing items in meeting the criteria to hold the Pre-Fabrication Review on the scheduled date.In addition, two additional rotary prototype tests on tapered bearings will be conducted.This work will finish very close to the end of April, which is pushing the May 11 review date.

Key Personnel

Larry Goble is still scheduled to leave the project following the May 11 review.We have hired one mechanical engineer (Ed Hileman, March 6th) as his replacement and have determined we do not need to hire a second mechanical engineer as reported in the last monthly report.

Jerry Penegor started work as the GNIRS EE on March 13th.