GLAST Large Area Telescope: Gamma-ray Large Area Space Telescope T-Vac Operations TIM Eric M. Gawehn SU-SLAC LAT I&T MGSE Department Manager egawehn@slac.stanford.edu 650 926 3622 Office 650 796 2576 Cell LAT - TD 0XXXX, Summary Page 1 of 21
T-Vac Stand Using Sine-Vibe Interface Counterweight Attach Interface on Opposite Side of GPR 1 Clearance Between Radiator and Interface Plate Attach Spider Leg Flexures and Sine-Vibe Test Interface Plates Attach T-Vac 90 Plate While on Integration Stand LAT - TD 0XXXX, Summary Page 2 of 21
T-Vac Stand Using Sine-Vibe Interface Add More Counterweight Attach 90 Gusset Plates Remove From Integration Stand, Then Remove Support Shafts LAT - TD 0XXXX, Summary Page 3 of 21
T-Vac Stand Using Sine-Vibe Interface Crane Op to T-Vac Floor, Then Attach to Support Frame Remove GPR to Grid Brackets LAT - TD 0XXXX, Summary Page 4 of 21
T-Vac Stand Using Sine-Vibe Interface Crane Op GPR & Z-Axis Horizontal Lift Spreader Away and Safe Attach Side Cold-Plate Supports LAT - TD 0XXXX, Summary Page 5 of 21
T-Vac Stand Using Sine-Vibe Interface Attach Top Frame Beams With +X Face Cold-Plate Insert Side and Bottom Cold- Plates After Top is Complete LAT - TD 0XXXX, Summary Page 6 of 21
T-Vac Stand Using Sine-Vibe Interface End View, To Scale Top View, To Scale LAT is 24 from Floor Plane 8 Clearance, All Around to Allow Cold-Plate Insertion Ops LAT - TD 0XXXX, Summary Page 7 of 21
T-Vac Stand Using GPR Interface LAT in Integration Stand (X- LAT Heat Plate Not Shown) Attach, but Do Not Pin, Support Members LAT - TD 0XXXX, Summary Page 8 of 21
T-Vac Stand Using GPR Interface Attach Vertical Support Members with Spider Leg Flexures Attach Horizontal Support Member with Spider Leg Flexure LAT - TD 0XXXX, Summary Page 9 of 21
T-Vac Stand Using GPR Interface Remove GPR to Grid Brackets; Rotation in Integration Stand May be Required Attach 90 Support Braces and Horizontal Tie Bars LAT - TD 0XXXX, Summary Page 10 of 21
T-Vac Stand Using GPR Interface Attach Z-Axis Horizontal Lift Fixture and Remove From Integration Stand Remove Support Shafts LAT - TD 0XXXX, Summary Page 11 of 21
T-Vac Stand Using GPR Interface Crane Op to T-Vac Floor Remove Z-Axis Horizontal Lift Fixture and Safe LAT - TD 0XXXX, Summary Page 12 of 21
Add Top Cold-Plate Support Frame T-Vac Stand Using GPR Interface 8 Gaps All Around LAT to Allow Cold-Plate Insertion Ops LAT - TD 0XXXX, Summary Page 13 of 21
T-Vac Stand Using GPR Interface End View, LAT in T-Vac Chamber, To Scale Top View, LAT in T-Vac Chamber, To Scale 24 Elevation Frame Not Shown LAT - TD 0XXXX, Summary Page 14 of 21
Integration Stand Function, Either T-Vac Stand Personnel Access Platforms (PAPs) at Highest Position to Allow Access to Lift Fixture 29.25 Riser Block to Allow LAT Rotation with Radiators Attached ( Note: Some Type of Radiator Support Will be Required ) LAT - TD 0XXXX, Summary Page 15 of 21
Integration Stand Function, Either T-Vac Stand PAPs at Lowest Position to Allow Bearing Removal Ops LAT - TD 0XXXX, Summary Page 16 of 21
LAT 4x4 Integration Stand, ISO View Grid Perimeter Ring Will Support LAT Primary Structure ( i.e., the Grid ) Each PAP has a Horizontal Range of Motion of 65 [ ~ 1.6 m ] Personnel Chest Support Frames Retract into Platforms When Not Needed LAT Rotation Axis is ~ 53 [ ~1.4 m ] from Floor Each PAP has a Vertical Range of Motion of 30 [ ~ 0.8 m ] 14 10 [ ~ 4.5 m ] 9 2 [ ~ 2.8 m ] LAT - TD 0XXXX, Summary Page 17 of 21
PAP Movement Sequence Each PAP Motion is Operated Individually by a Technician on the Ground. Two Spotters Will Provide Feedback to PAP Driver to Assist Impact Avoidance Limit Switches prevent power from being supplied to PAP Drives Unless LAT is Level within ± 1 (TBC) PAPs Shown in Parked Position Only One Drive will Receive Power at a Time LAT - TD 0XXXX, Summary Page 18 of 21
PAP Movement Sequence, Continued If LAT is Level, One PAP can be Retracted from Parked Position at a Time Step 1: Retract a PAP Hard Mechanical Stops will be Adjusted for CAL Access Operations After PAP Retraction, The respective PAP is Elevated to Desired Position and Confirmed Using a Height Validation Yard Stick PAP Elevated, If Needed, After Retraction Step 2: Elevate PAP to Work Height as Required LAT - TD 0XXXX, Summary Page 19 of 21
PAP Movement Sequence, Continued After Correct PAP Height is Verified, the PAP is Rotated to Align with Desired Bay for Planned Operations Step 3: Rotate a PAP After PAP Rotation is Complete, PAP is Slowly Extended to Desired Bay Movement of 2 nd PAP Occurs After Completion of 1 st PAP, and in the Same Manner Again, Power is Only Available to One Drive at a Time! Step 4: Extend a PAP LAT - TD 0XXXX, Summary Page 20 of 21
PAP Movement Sequence, Continued PAP Movement Sequence for 2 nd Platform is Same as 1 st ; Not Shown to Reduce Sht Count After Bay Operations Complete, PAP is Retracted Step 5: Retract PAP Step 6: Rotate PAP Step 7: Extend PAP to Park Step 8: Lower PAP to Parked Position LAT - TD 0XXXX, Summary Page 21 of 21
For More Information About LAT MGSE 4x4 Integration Stand LAT TD 03782, Entire Appendix A Contingency Operations CAL Contingency Operations - TKR Operations Planning History / Summary of Trades All LAT MGSE, Go To: http://www-glast.slac.stanford.edu/integrationtest/mgse/default_mgse.htm LAT - TD 0XXXX, Summary Page 22 of 21