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1 GLAST LAT ProjectMechanical Systems Mechanical Systems September 2003 GSFC Status Marc Campell, Subsystem Manager.

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Presentation on theme: "1 GLAST LAT ProjectMechanical Systems Mechanical Systems September 2003 GSFC Status Marc Campell, Subsystem Manager."— Presentation transcript:

1 1 GLAST LAT ProjectMechanical Systems Mechanical Systems September 2003 GSFC Status Marc Campell, Subsystem Manager

2 2 GLAST LAT ProjectMechanical Systems Accomplishments Accomplishments during October –Tapemation completed rough machining of billet #1 –Heat treatment and straightening of Grid should complete by 10/31, Mother Nature willing –EMI & grounding issues resolved and changes incorporated –Grid – TRK flex cable issues resolved & Grid model updated with these changes –Radiator specification released –Downspout and Top Flange Heat Pipes progressing through Manufacturing –Scott Herzberz hired for Mechanical Engineer position –Complete re-baseline activities

3 3 GLAST LAT ProjectMechanical Systems Issues & Concerns Close last remaining issues prior to the start of detailed machining of the grid (analysis- CLA changes & detailed stress report, TRK I/F ) Grid to I&T delivery date Resolution of X-LAT – E-Box interface including completion of analyses and testing X-LAT plate & Radiator delivery schedule

4 4 GLAST LAT ProjectMechanical Systems Open Flight Design Issues

5 5 GLAST LAT ProjectMechanical Systems Mech Sys Parts List All mechanical parts are approved by SLAC & GSFC 10 EEE parts for Thermal Control System are not yet approved –1 thermistor submitted, approved and ordered –4 Thermal Switches (Grid pri & redn, Radiator reservoir and anti- freeze) set point has been defined (ELEC reviewing) –4 Heaters (Grid pri & redn, Radiator reservoir and anti-freeze) awaiting final sizing –1 RTD (for Radiator) –All parts to be submitted for approval by 10/31

6 6 GLAST LAT ProjectMechanical Systems 3 Month Milestones

7 7 GLAST LAT ProjectMechanical Systems 3 Month Milestones (cont)

8 8 GLAST LAT ProjectMechanical Systems Schedule Variances 4.1.8.5 Thermal Control System Cum SV = -$388K late start due to unavailability of key personnel across subsystem lines –Design, fab, assemble and test control system prototype –Analyze TCS performance –Detail drawings & spec for hardware Recovery plan –Plan is not in place –ELEC is doing some work on flight designs –Lori Bator coordinating LAT instrumentation plan update –Requirements for prototype are needed –Jack Goodman hired as LAT thermal engineer to lead this effort

9 9 GLAST LAT ProjectMechanical Systems Schedule Variances (cont.) 4.1.8.7 Grid EM program Cum SV = -$162K = -$125 Labor and -$37 Mat’l -$37 Material is EM hardware procurements –Cantilever Beam, CAL-Grid interface test, Grid HP process tests EM TASKSV x $000COMMENT Grid Top Flange HP processes19Deferring until Fall 03 CAL tab coupon tests2Write test report 1 Bay Grid test*18Test definition is TBR Cantilever Beam test*50Test deleted. To be folded into 1 x 4 test 1 x 4 Grid test5Write test report X-LAT Plate prototype design, fixtures & fab* 73LM will perform. Tasks will be deleted after LM Phase II is approved EMI skirt mock-up0complete Total162 4.1.8.7 Grid EM program Recovery Plan –EM tasks marked * ($141K) will be re-planned along with incorporation of LM Phase II efforts

10 10 GLAST LAT ProjectMechanical Systems Schedule Variances (cont.) 4.1.8.8 Flight Fab, Assy & Test Cum SV = -$409K late start of Assembly preparations –Grid Tasks -$105K –Grid Mat’l & fixtures -$175K (Flight Grid) –X-LAT Tasks -$129K (will to remove from plan) Recovery plan –Rebaseline plan is in work –Grid MGSE next up for Designers after Grid Box designs are released

11 11 GLAST LAT ProjectMechanical Systems Cost Variances 4.1.8.3 Mechanical System Dev Cum CV = -$297k –Will continue until TRK-Grid and X-LAT – E-box interfaces are finalized –Additional resources for this will be captured in rebaseline plan. Lockheed-Martin cost breakdown by WBS was not available Cum CV = +$668K –LM did not spend according to plan last month Recovery plan –LM manufacturing effort full turn on after MRR 11/03 4.1.8.7 Engineering Modeling Cum CV = -$124K = -$78K Labor and -$45K Material –Most of CV is for ongoing EM tests related to Cal-Grid, X-LAT and Spacecraft interfaces Recovery plan –Additional resources for this will be captured in rebaseline plan.

12 12 GLAST LAT ProjectMechanical Systems Program Threats Top 5 threats to maintaining schedule –Inadequate manpower –Closure of open items for Grid manufacturing –Resolution of X-LAT – E-Box interface –EM tests and flight designs are being performed in parallel – increases impact of any EM test failure –LM does not get their requested information in a timely manner Top 6 threats to staying within cost –As CDR design and fabrication plans solidify, we may find that fabrication costs exceed what was budgeted (which was based on preliminary/conceptual designs) –Grid Box Assy Test program may exceed what was budgeted due to scope increase –TCS prototype costs (may require PDU, SIU & GASU boards) –CAL-Grid interface design taking longer than budgeted –EM program taking longer than budgeted –LM cost for X-LAT work larger than budgeted

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