Progress Report
July 28-August 22, 2000
Accomplishments / Status
Summary: Overall, 30% of the work from the Restart Review to delivery
has been completed. The primary focus of this reporting period has been 1) solid
modeling design and deflection analysis of the Post-Slit, Pre-Slit, and OIWFS
Optical Benches, 2) assembling the fabrication bid package for the benches, 3)
modeling of the Slit/Decker mechanisms, 4) 2D design of the Filter Wheel
mechanism, 5) fabrication of the Environmental Cover mechanism and 6)
fabrication of the motor drive assembly. In
addition, the fourth Quarterly Review of the project was held on August 15th.
Next
Milestone:
The next major project milestone is the release of the OIWFS optical bench for
fabrication in early September 2000.
Earned
Value:
BCWS $ 1,552,209
SPI
0.55
BCWP $
850,144
CPI
0.86
ACWP $
986,250
Project
Management:
(36% completed) The project plan has again been revised to reflect changes in
the work flow on benches and mechanisms and can be viewed on the GNIRS web site
at: http://www.noao.edu/ets/gnirs/
under Management, Planning. The
scheduled delivery date of the completed GNIRS instrument has not changed.
A
quarterly review of the project was held on August 15th.
Presentation materials for this review are posted on the GNIRS web site
at http://www.noao.edu/ets/gnirs/
under Management, Reviews, and Quarterly Review Presentation.
A
document answering Pre-Fabrication Review committee concerns and comments was
prepared and sent to Gemini. This
can be viewed at http://www.noao.edu/ets/gnirs/
under Management, Reviews, and Pre-Fabrication Review Response.
Systems
Engineering:
(99%) The activities in work included 1) structural analysis and 2) linear
prototype. The Project
Scientist with part time support from a staff support scientist is assigned to
this task.
The
structural analysis was completed on August 15. The results have been passed to
the optical engineer for calculation of beam position on the detector as a
function of bench deflection. These results will be available in the third week
of August.
The
Linear Mechanism Prototype has completed test. This is the final mechanism
prototype that will be done on the project. It was determined that the bearing
prototype previously planned was applicable only to the Prism and Grating
mechanisms, and that the tapered bearing approach used for the Camera mechanism
is applicable to all rotary mechanisms. We have committed all rotary mechanisms
to use the tapered bearing approach.
Mechanical
Design and Fabrication: (17%) Activities include optical bench solid modeling, slit/decker
mechanism design, camera design, filter wheel design, environmental cover
fabrication, and motor drive assembly fabrication.
Wavefront
Sensor Bench, Post-Slit Optical bench and Collimator Mount. The next task for
these major bench assemblies is to finish 2D designs for fabrication. We plan to
have a vendor under contract to fabricate the OIWFS bench by the first week of
September, and the other two benches in fabrication by the end of September. One
engineer and one designer are assigned to these tasks.
The
Slit/Decker mechanism assembly 3D design is 90% complete. One engineer and one
designer are assigned to this activity.
Camera
Mechanism. The short red camera is in drawing check/revision. This is required
before sending drawings to fabrication. The short blue camera 2D drafting is 16%
complete and is on hold until the 3D design of the long camera is complete. The
camera drive spindle hub 2D drafting is 13% complete. One designer is assigned
to the camera design tasks.
Filter
Wheel Assembly mechanism. 2D drafting is waiting to start. One designer is
assigned to this task.
Environmental
Cover Assembly. Fabrication is 87%
complete.
The
Acquisition Mirror mechanism. 2D
drafting is 35% complete.
The
Motor Drive Assembly is in fabrication.
Electronics
Design:
(10%) Activities in this work package include 1) electrical and mechanical
design and construction of a simulator for use in software testing, 2) dewar and
mechanism wiring design definition, 3) array interface wiring definition, 4)
cold stationing definition and 5) re-planning of the electronics work flow. One
engineer and one graduate EE student intern are assigned to this work.
The
construction of the Mechanism Simulator is
complete and ready for use. Work on defining dewar wiring, and ALADDIN array interfacing details and
detailed Mechanism wiring is in process.
Software
Development:
(30%) No work has been done on the software this month.
The next step involves software testing using the Mechanism Simulator.
The Components Controller Software is 59% complete, and the System
Software is 5% complete. One
software engineer is assigned to this work, assisted by a second engineer on a
part time basis.
Procurement:
(32%) Major activities in this Work Package included optics work at RMI and
monitoring vendor fabrication. One
parts procurement and management person is assigned to this task.
Problems / Solutions.
An electronics technician will be needed on GNIRS starting in September.
Key Personnel
No items
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