Review

1
LAT Environmental Test Planning and Design
Review 3-4 May 2005 Overview
Martin Nordby
2
Goals of This Review

• Where we are now
• This is likely the last time that we will review
  our overall test program for the LAT
  environmental testing until the Test Readiness
  Review
• Much of what we will be presenting and reviewing
  has been gone over in one forum or another over
  the past 3-4 months, but not all in one place and
  time
• Goals of this review
• 1. Approve the environmental test sequenceboth
  the general sequence of tests, as well as the
  specific sequencing of the segments of each test
  that are presented as part of the individual test
  plans
• 2. Approve the preliminary designs for the test
  MGSE and EGSE for all of the tests
• 3. Approve the goals and plans for each of the
  testsTest Plans will be sent out for review
  soon, but this review is intended to finalize the
  structure and major segments of the tests
• Where we are going
• After this review, we will be holding only
  detailed reviews to cover specific topics
• In particular
• There will likely be individual table-top reviews
  of the Test Plans as they are sent out for
  release
• CDRs will be held prior to sending the large
  pieces of MGSE
• Pathfinder review will be held before we start
  the pathfinder program for data systems or
  mechanical operations
• TRR will be held after the pathfinder program is
  complete and procedures updatedthis may be part
  of the LAT pre-ship review, focusing on plans,
  procedures, and logistics, and demonstrating that
  we are ready to receive the LAT at NRL
• Individual TRRs for each testfocusing on the
  specifics for each test, and a more technical
  discipline review of the test program

3
Environmental Test Sequence

• LAT-MD-00408, the LAT Instrument Performance
  Verification Plan delineates the basic content
  and order of all required LAT environmental tests
• This responds to the requirements put forth in
  the MAR, GEVS, IRD, and other governing documents
• LAT-MD-02717, the LAT Environmental Test
  Sequence details the order of environmental
  tests, and the major operational steps
• This is subservient to the LAT-MD-00408, but
  includes significantly more operational detail
• This bridges the logistics gap between the
  MD-00408 and the Test Plans, much as
  LAT-MD-006786, the LAT Integration Sequence
  provides direction for LAT integration
• LAT-MD-00408 needs to be updated to reflect the
  final sequence agreed on by all test directors
  and subject-matter leads. Below is the updated
  sequence that will be baselined

Sine Vibe
EMI/EMC
Reconfig. LAT
Acoustic
Receive, Unpack
Mount Radiators
Perform Reference CPT (at SLAC)
C
L
L
L
L
L
L
L
4X
T-Cycle
T-Bal
Remove Radiators
Weight, CG
Ship to Spectrum
Pack LAT
C
S
C
S
L
C
C
S
Final CPT
Updated LAT Environmental Test Sequence
4
Test Sequence Walk-Through

• Reference CPT
• Perform Reference CPT at SLAC prior to shipping
• Receiving and Prep
• Unpack LAT leave on pallet base (A-59 high bay)
• Run CPT establish instrument health prior to
  start of env testing (LAT clean tent)
• Sine Vibe Test
• Move to vibe test lab
• Run LPT on vibe table expander head, prior to
  start of test
• Perform Z-axis vibe
• Run LPT on vibe table expander head, prior to
  Z-axis tear-down
• Move LAT to slip table and perform X-axis vibe
• Run LPT on slip table, prior to X-axis
  tear-down
• Re-orient LAT on slip table and perform Y-axis
  vibe
• Run LPT on slip table, prior to removing LAT
• Move LAT back to A-59 high bay clean tent
• Re-configure LAT
• Hoist LAT onto Test Stand (A-59 high bay)
• EMI/EMC Test
• Move to anechoic chamber

5
Test Sequence Walk-Through (cont. 1)

• Install Radiators
• Integrate Radiators (A-59 high bay)
• Run Radiator CPT after both Radiators are
  installed (LAT clean tent)
• Run LAT LPT (LAT clean tent)
• Acoustic Test
• Move to acoustic test cell
• Run LPT in acoustic test cell, prior to test
• Perform Acoustic test
• Run LPT in acoustic chamber, prior to removing
  LAT
• Move LAT back to A-59 high bay
• Re-orient LAT (A-59 high bay)
• Mount extension beams to Test Stand
• Rotate LAT 90 degrees using two-hook lift and
  spreader bars
• Prep for Thermal-Vacuum Test (A-59 high bay)
• Pick up LAT and set on T-Vac cart
• Move LAT to T-Vac chamber and prep for test
• Roll LAT into chamber
• Run CPT in T-Vac chamber, prior to door closing
• Run SVAC test in T-Vac chamber, prior to door
  closing

6
Test Sequence Walk-Through (cont. 2)

• Thermal-Vacuum Test (T-Vac chamber)
• Pump down
• Bake out
• Hot survival run Initialization, Aliveness, and
  CPT tests
• Thermal-balance hot run LPT, SVAC, TCS Perf
  tests
• Thermal-balance cold run LPT, SVAC, TCS Perf
  tests
• Cold survival run Initialization, Aliveness,
  and CPT tests
• Thermal cycle hot (2) run LPT
• Thermal cycle cold (2) run LPT
• Thermal cycle hot (3) run LPT
• Thermal cycle cold (3) run LPT
• Thermal cycle hot (4) run CPT
• Thermal cycle cold (4) run CPT
• Return to ambient temperature
• Vent chamber
• Run final LAT CPT in T-Vac chamber after
  venting and opening doors
• Run SVAC in T-Vac chamber after venting and
  opening door
• Break configuration and return LAT to A-59 high
  bay

7
Test Sequence Walk-Through (cont. 3)

• Remove Radiators (A-59 high bay)
• Mount extension beams to Test Stand
• Rotate LAT 90 degrees back to vertical using
  two-hook lift and spreader bars
• Remove and pack Radiators
• Weight and C.G. Measurement (A-59 high bay)
• Hoist LAT off Test Stand onto CG Plate
• Measure LAT weight and center of gravity
• Hoist LAT off CG Plate and onto pallet base
• Move into clean tent
• Pre-Ship Review
• Pack LAT and Ship
• Prep and seal Transport Container
• Ship to Spectrum