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Project Apollo Beta 7.0 released!
http://nassp.sf.net/wiki/Installation
25068 Posts in 2094 Topics by 2266 Members
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Author Topic: Apollo 8 Testing using Apollo 8 Flightplan  (Read 12489 times)
irnenginer
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« Reply #30 on: April 16, 2008, 12:22:29 AM »

For some reason CVS is not letting me commit the changes to Apollo 8 to add the solar positioning. But since you are in the middle of the mission anyway I will add a cheat to add in to your scenario here as well so you do not have to start over. Add in the following
Code:
  EMEM2132 750
  EMEM2133 17451
  EMEM2134 60235
  EMEM2135 24074
  EMEM2136 71143
  EMEM2137 15361
  EMEM2140 22712
  EMEM2141 32350
  EMEM2142 1013
  EMEM2143 10220
  EMEM2144 343
  EMEM2145 11014
  EMEM2146 550
  EMEM2147 4340 

This should get rid of that pesky COMP ACTY lockup.  Thumbs Up

Reuben,

Take a look at section 6.10 of that R-577. Section 6.10 contains a block diagram (page 6-66 Evil or Very Mad) of the SPS actuators.  As it is shown there it is more complex then a PID could model. I do think we may be able to use a PID to get close enough to work. I am working on simulating this model, and we could adapt something from that.
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Tschachim
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« Reply #31 on: April 16, 2008, 08:29:15 AM »

Hi irnenginer,

what problems did you encounter with CVS? Do you want me to commit these changes for you?
And a little bit OT, do we get a solar position for Apollo 7, too?  Happy

Cheers
Tschachim
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lassombra
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« Reply #32 on: April 16, 2008, 12:19:16 PM »

Yeah, I wants me solar position  Excited!

Realistically though, it's nice that the AGC now knows where the sun is.  irnenginer, you are amazing...  Keep it up!
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My current Project Apollo work:

Quickstart to the Moon initiative (Quickstart_to_the_Moon): Done through earth orbit.  Working on new method of calculating TLI.

Checklist Controller: 
  • MFD Interface 99%(Minor cleanup and future features remain)
  • Panel Interface 99%
  • Excel interface and logic 99%
  • LEM Event code.0%
  • DSKY Interface code. Framework complete, creating "buttons"
  Approximately 80% done. (Checklist Controller
rwitham
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« Reply #33 on: April 16, 2008, 12:36:33 PM »

irnenginer,

Thanks for the scenario data.  I'll give that a try soon.

After looking at the block diagram you mentioned, I don't believe it's coincidental that the page number is 6-66.  WOW!!  Shocked

I'm not sure I understand what all the grpahical symbols mean.  For example the circle with the 'X' or the '+' with a slash that has 2 horizontal ends.

In addition, it doesn't appear that all the mathmatical symbols are defined.  I don't see a definition for TS (Tau).
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irnenginer
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« Reply #34 on: April 16, 2008, 03:46:30 PM »


what problems did you encounter with CVS? Do you want me to commit these changes for you?
And a little bit OT, do we get a solar position for Apollo 7, too?  Happy

It was not accepting my password. I was going to try again before I got worked up about it.
We can also get A7 solar data as well. I have it calculated and I just need to enter it in as well.

For example the circle with the 'X' or the '+' with a slash that has 2 horizontal ends.

In addition, it doesn't appear that all the mathmatical symbols are defined.  I don't see a definition for TS (Tau).


The circle(X) blocks are summing nodes that either add or subtract based on the symbol of the inputs. The second is a limiter such that when a input goes above a limit the output holds to the limit.

I think TS is actually T5
Happy
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Admiral
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« Reply #35 on: April 16, 2008, 04:15:35 PM »

Code:
  EMEM2132 750
  EMEM2133 17451
  EMEM2134 60235
  EMEM2135 24074
  EMEM2136 71143
  EMEM2137 15361
  EMEM2140 22712
  EMEM2141 32350
  EMEM2142 1013
  EMEM2143 10220
  EMEM2144 343
  EMEM2145 11014
  EMEM2146 550
  EMEM2147 4340 

This should get rid of that pesky COMP ACTY lockup.  Thumbs Up


I just tried this at 59 hours on a quick save that had the stuck light.  Within 44 seconds, poof, the light went out.

It worked!  Thanks irnenginer.

How did you work that out?

I missed the earlier email about lockup. I know exactly what that is about. I still need to commit changes to include solar position data into the AGC load(the current scenerio may also be missing an accurate lunar position as well).

I have stuck lights later in the mission so if you have an accurate lunar position data, I could check it in later quicksaves too

Hope this holds for you Reuben for the rest of the mission.



The Admiral
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rwitham
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« Reply #36 on: April 16, 2008, 04:23:26 PM »

So, irnenginer, are you are able to model the entire diagram then?  If so, I'd say you're on your way to a solution.   Thumbs Up

Sadly, I'm not very versed in mechanical control theory.  I don't think I can be much help after all.   Sorry

Good Luck!
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irnenginer
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« Reply #37 on: April 16, 2008, 10:19:33 PM »

How did you work that out?

I do have a Wiki item for the solar stuff but it does not have much in it yet.

http://nassp.sourceforge.net/wiki/Solar_Ephemeris

Actually the Solar Ephemeris is a layup compared to the lunar. Which I did check and found that it is correct in Apollo 8 so you should be good to go.

So, irnenginer, are you are able to model the entire diagram then?  If so, I'd say you're on your way to a solution.   Thumbs Up

Sadly, I'm not very versed in mechanical control theory.  I don't think I can be much help after all.   Sorry

Good Luck!

In theory I should be able to get a model to work, but as they say, in theory communism works! Very Happy In reality I was never very good at control systems. But I did pass the class.  Very Happy
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Tschachim
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« Reply #38 on: April 17, 2008, 04:53:16 AM »

It was not accepting my password. I was going to try again before I got worked up about it.

I found this on the SourceForge status site:

Quote from: SourceForge
(  2008-03-07 05:25:00 - Project CVS Service, Project Shell Service, Project Subversion (SVN) Service, SourceForge.net Web Site  )   On 2008-03-06, during a routine security audit, SourceForge.net staff identified a deficiency in systems data control. We are unaware of any exploitation of this data, which was present in encrypted form. In addition to removing the data, as a preventative measure we have also forced password changes for all SourceForge.net user accounts.

( 2008-03-06 14:23:47 - SourceForge.net Web Site )   In support of improved security, all SourceForge.net user passwords have been expired and must be changed upon next login. CVS, Subversion and Shell users will need to login to the site to change their password before they will be able to access these services.

so perhaps you need to login on the SourceForge site at first and change your password.

We can also get A7 solar data as well. I have it calculated and I just need to enter it in as well.

Great news, thanks a lot!  Thumbs Up

Cheers
Tschachim
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lassombra
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« Reply #39 on: April 17, 2008, 02:56:29 PM »

That doesn't affect me because I use an ssh key to log in Happy
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My current Project Apollo work:

Quickstart to the Moon initiative (Quickstart_to_the_Moon): Done through earth orbit.  Working on new method of calculating TLI.

Checklist Controller: 
  • MFD Interface 99%(Minor cleanup and future features remain)
  • Panel Interface 99%
  • Excel interface and logic 99%
  • LEM Event code.0%
  • DSKY Interface code. Framework complete, creating "buttons"
  Approximately 80% done. (Checklist Controller
rwitham
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« Reply #40 on: April 17, 2008, 05:19:54 PM »

I added the EMEM values to my scenario and just as Admiral stated, the lock up disappeared within 30 seconds.  I was able to do my 2nd MCC with no problems.  Happy

However, I am now at MET 065:16:00 and the lock up has resumed.  I have since save the scenario a couple of times and verified that the most recent scenario still contains those EMEM values.  Any ideas?

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bluespace88
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« Reply #41 on: April 17, 2008, 10:00:37 PM »

Nope.  I had the same problem.
« Last Edit: April 17, 2008, 10:03:26 PM by BlueDragon8144 » Logged
Admiral
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« Reply #42 on: April 18, 2008, 03:38:16 AM »

Did you try a state vector update?  If you had done a V96 mentioned in earlier posts, then you might have to try another manual state vector update again.  My  Two Cents


The Admiral
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lassombra
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« Reply #43 on: April 18, 2008, 04:07:35 AM »

I believe it's something like 24 hours between required state vectors now.  There's a post about this somewhere...  The vAGC now knows what it needs to know to know when to force a SV update.  Though, if I remember, that should only cause a prog alarm, and only when doing something that requires the state vector.  So... I don't think that can cause the freeze up.

Instead, it sounds like messed up lunar ephemeris data.  If you are now in the lunar SOI, that is likely the new problem.

just my  Two Cents
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My current Project Apollo work:

Quickstart to the Moon initiative (Quickstart_to_the_Moon): Done through earth orbit.  Working on new method of calculating TLI.

Checklist Controller: 
  • MFD Interface 99%(Minor cleanup and future features remain)
  • Panel Interface 99%
  • Excel interface and logic 99%
  • LEM Event code.0%
  • DSKY Interface code. Framework complete, creating "buttons"
  Approximately 80% done. (Checklist Controller
bluespace88
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« Reply #44 on: April 18, 2008, 06:58:02 AM »

well, I went back and redid the state vectors.  I might have messed up a number somewhere when punching it in, as I'm now at 66 hours within the moon soi and no comp acty problems.

Need to fix the state vector stuff to let you choose between moon or earth soi when in the sun's soi.

EDIT: I'm now in a circular lunar orbit, and the computer has given me no problems at all.
« Last Edit: April 18, 2008, 08:25:38 AM by BlueDragon8144 » Logged
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