OHM Lagrangian points MFD v0.2

[OrbitHangar]

Author: ajaja

This module calculates position and velocity of Lagrangian points in Orbiter, show coordinates and speed vector of your ship relative selected point and can "teleport" ship into.
It can calculate RPOS/RVEL of selected point and write it into *.scn file on saving. Useful for placing stations into L1/L2/L3/L4/L5 points in custom scenarios.

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[jgrillo2002]

Looks nice but can you make a 2006 version of this, as most of the community use this version

 

[Ajaja]

Looks nice but can you make a 2006 version of this, as most of the community use this version

I use MFD2 and CELBODY2 classes. It will not be easy to rewrite the module for 2006.

---------- Post added at 06:00 PM ---------- Previous post was at 11:53 AM ----------

Update to v0.2. Compiled against Orbiter 2006 (will work in 2009 beta too).
Some code was taken from TransX because GetParent/GetChild are absent in Orbiter 2006 SDK and I'm too lazy to write it myself

 

[tblaxland]

Looks nice but can you make a 2006 version of this, as most of the community use this version

Like this? [nomedia="http://orbithangar.com/searchid.php?ID=3644"]Lagrange MFD 0.7[/nomedia]

 

[Cairan]

The only thing missing on this add-on is the possibility of spawning a Lagrange station-keeping control loop in the background, so that a station stays pinned to it's L-point "effortlessly" if wanted... Say: Add a "FIX" button so that activating that function, like GO, takes you to the L-point but then at every timestep also applies the appropriate position correction to the ship/station.

Going fancy, doing so might also actually invoke the ship's or station's own RCS so that it actually uses fuel for the Lagrange point station-leeping! Maybe set another MFD button "RCS" for that mode of operation.

 

[Wishbone]

What is the size of deadband region around Lagrange points you would like to use (that is range to the exact L-point where no RCS is fired)? Doesn't make sense if this stationkeeping leaves one's ship dry after a few hours...

 

[Cairan]

What is the size of deadband region around Lagrange points you would like to use (that is range to the exact L-point where no RCS is fired)? Doesn't make sense if this stationkeeping leaves one's ship dry after a few hours...

Well, I am not the designer, but as long as we are throwing ideas around, let's say a 1% tolerance, based upon the ratio of Lagrange point to Secondary Object distance versus Ship's distance to the Lagrange point.

Take the Moon's L1, at about 65000 km from the Moon... An error of 650 km would be quite acceptable before a correction burn to nudge back the ship or station towards it's L-point... That would yield about 15000 km for Earth's L1... As for the amplitude of the burn, to avoid oscillations, chasing and the like, calculate it so that the post-burn velocity towards the L-point is 1/2 or 2/3 of the pre-burn velocity drifting away from the L-point, with a second burn to nullify any velocity just after a minimum distance to the L-point is reached and range starts to increase again.