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Mech Team Schedule 

Aug 22  launcher prototype  
Sept      test prototype 
Oct 5     launcher EM fab  
Nov 5     structure shake 
Nov 15   deliver launcher EM 
Nov 30  OPAL mass model  
Nov -Dec launcher EM test 
Jan 1     flight launcher fab 
Feb 1    finish flight launcher 
Mar       flight environ testing 
May 1   OPAL flight delivery 
Sep 1    Launch at VAFB 
 

 OPAL Mechanisms Team Meeting Agenda          October 19, 1998 

Subsystem Discussion 

Picosat Launcher Engineering Model -- Jeff 
  • Order rect. and Belleville springs, latch cables

    • Request for quotes in on revised spring specs, Richard Anderson looking as well to see if he can get it done cheaper 
  • Fabrication quote and production 

    • Both quotes back -- $2404 and $2640, respectively, P. Twiggs looking for money to do it 
  • Dry lube application -- need to look at all parts that move with respect to one another, including top and bottom plates, hinge rods, rails, door, wedge, backstop.
  • Instrumentation -- Eric not present, Jeff to e-mail about update;  coordinate with Shawn and Wade with respect to sensor integration with CPU, software
  • Actuators - Delivery next week on Wed. or Thurs.
  • Launch sequence -- Scott laid out sequence that includes a driver that would actually send the signal to the actuators.  The driver would have its power off until right before actuator firing.  Sequence would be: turn on sensors, turn on driver, send actuator fire command, turn off driver, turn off sensors.

    • This sequence would require two spurious signals to fire the actuators accidentally, so provides redundant protection. 
    Scott to talk to Shawn and Allejandro about pin lines to launcher, and to Eric and David about launcher sensors.
  • Test apparatus -- just need a plate to match 2x2" hole grid  Andy to find out bolt size
  • Testing procedures -- David creating generic test procedures that can be made specific to the EM
Launch Interface -- David 
  • David created prioritized task list, including list of machining needs to coordinate with Santiago
  • Actuator redesign and method of attaching OPAL

    • David to check with Allison Nordt about method of fabbing cup/cone pairs 
  • Part fabrication -- list made to coordinate machining with Santiago
  • Shake interface with OPAL vertically -- details below
  • Structural analysis -- Eric completed a quick structural strength analysis, will do a summary writeup of it.
  • Test apparatus -- waiting for more specific info back from Lockheed, preliminary: 2" bolt pattern with 4" adapter; need to determine bolt size
  • Need to create production drawings of interface
Structure -- Santiago 
  • Santiago to coordinate all machining work done for OPAL;  if any subsystem needs parts made, should work through Santiago to be sure we are allocating our resources well.

    • Brian P., Bruce, Santiago, and Aldo are main machining resources, with Allejandro, Wade, and Jin trying to get in to the safety class so they can help as well. 
  • Shake structure:
    • Mass boxes -- Allejandro working on masses, Santiago has completed all mass boxes except CPU, should be finished by Thursday

      • Need to make sure to completely capture masses to avoid rattling 
    • Fasteners and other materials -- rest of needed materials to be delivered this week
    • Assemble shake structure
    • Static loads test  -- need to come up with a test plan 
  • Flight structure:
    • Solar panel holes
Testing -- David and Andy 
  • Interface and OPAL structure verification testing 

    • Lockheed will likely have a slot for us the second week of November, but their schedules are slipping, so they might not be able to give us much notice before we have to be there, probably 1-2 day notice.  Mark St. Pierre is writing up a quote, forwarding it to Mark McMahon, who will review it and decide how to pay for it. 
    David to call and e-mail him to remind him in the next two days 
  • Launcher EM testing

    • Loral is holding a tentative slot for us on Mon., Nov. 16, at 10pm for 2-3 hours to shake the EM.  It is uncertain whether they will be able to donate the time at this point.  Cost will be in the $2000 plus range. 
  • Testing procedures

    • David completed 1st draft, Andy and Jeff to review and provide comments by Wednesday OGM 
  • David to talk with Mike Swartwout about requirements of SAPPHIRE to shake as well as who gets what launch interface
JAWSAT and Orbital Sciences Corp. -- Jeff 
  • Interface Control Document updates

    • need to determine and then send magnetometer info to WSU and CSA 
    need transponder info (at least rough weight and size estimates) from SCU 
  • JAWSAT CDR & PIWG Oct. 29 at Weber St.

    • Jeff to attend both meetings, Jamie might attend just one 
  • Battery trickle charger through ASU

    • Jeff to talk to Carlos about working with ASU on this
Miscellaneous 
  • Schedule updates 

    • David to update testing schedule 
  • Budget for each subsystem

    • Jeff -- picosat launcher and travel 
    David -- testing and interface 
    Santiago -- structure and other in-house machining and fabrication