Board index FlightGear Development Aircraft Systems

Simulating IRS Allignment

Modeling aircraft systems, like electrical stuff, hydraulics, pneumatics? Feel free to ask support.

Simulating IRS Allignment

Postby Octal450 » Sun May 29, 2016 3:22 pm

I am going to be developing a Nasal based IRS system, it will first be inplace on the MD-11. It will not actually be able to be used for navigating (I'm not that smart), but toadd more realism to aircraft startup. It will contain 3 IRS, L, C, R. I'm sure it could be easily adapted for 2 IRS, and my goal is to make it addable to every plane, of course modifying some instruments are required. I will post the code here once it is working.
Waste of time. Goodbye forever.
Octal450
 
Posts: 4398
Joined: Tue Oct 06, 2015 12:51 pm

Re: Simulating IRS Allignment

Postby Hooray » Sun May 29, 2016 3:28 pm

I think we already have some kind of INS/IRS code somewhere, IIRC, it was flameout who once worked on something along those lines - you may want to run a forum search.


http://wiki.flightgear.org/Inertial_Navigation_System
Please don't send support requests by PM, instead post your questions on the forum so that all users can contribute and benefit
Thanks & all the best,
Hooray
Help write next month's newsletter !
pui2canvas | MapStructure | Canvas Development | Programming resources
Hooray
 
Posts: 11340
Joined: Tue Mar 25, 2008 8:40 am

Re: Simulating IRS Allignment

Postby Octal450 » Sun May 29, 2016 3:54 pm

We will see, I will do some searches.
Waste of time. Goodbye forever.
Octal450
 
Posts: 4398
Joined: Tue Oct 06, 2015 12:51 pm

Re: Simulating IRS Allignment

Postby sanhozay » Sun May 29, 2016 6:18 pm

The 757-200 has some simulation of IRS alignment.
sanhozay
 
Posts: 1207
Joined: Thu Dec 26, 2013 11:57 am
Location: EGNM
Callsign: G-SHOZ
Version: Git
OS: Ubuntu 16.04

Re: Simulating IRS Allignment

Postby legoboyvdlp » Mon May 30, 2016 7:31 pm

You can also look at the A330 too :)
It should be in a separate branch.
User avatar
legoboyvdlp
 
Posts: 7088
Joined: Sat Jul 26, 2014 1:28 am
Callsign: YV-LEGO
Version: 2018.3.1
OS: Windows 10 HP

Re: Simulating IRS Allignment

Postby tikibar » Wed Jun 01, 2016 1:47 am

As sanhozay pointed out, the 757 has a form of IRS alignment. It's also in the 747-8 and 767. It doesn't actually simulate an IRS, but it does simulate some of the initialization of the system. In the 747-8, there's a selection in the Control Panel dialog where you can choose your level of realism by setting how long it takes to align (30 sec, 5 min, or 13 min). It's set to 5 min for the 757/767. It doesn't really affect anything in the end except if you fly a route-manager flightplan without aligning the IRS, "IRS ALIGN" appears in orange on the EICAS for your whole flight. It also does a 30-second realignment. In the 757 and 767, it's in Nasal/systems.nas. Look for IRS/INS
Boeing 747-8 (rename folder to 747-8i)
Boeing 757-200/300 (rename folder to 757-200)
Boeing 767-300/ER (rename folder to 767-300)
McDonnell Douglas MD-11 (rename folder to MD-11)
User avatar
tikibar
 
Posts: 514
Joined: Mon Mar 05, 2012 6:05 am
Location: Los Angeles
Callsign: CHT0009
OS: Ubuntu 14.04

Re: Simulating IRS Allignment

Postby Octal450 » Wed Jun 01, 2016 10:02 pm

@tikibar
I think I'll begin adapting systems from your 757 to the MD-11, making the necessary changes to work like an MD-11. I wish there was a wiki page that showed everything that is done so far...
I plan to have such a control box as well, with the default set on real time, but in autostart, it skips it.

I'm not the best with this m.mode m.stuff and similar nasal function, ill need that explanined, but I will try to do it a slightly different way.
Waste of time. Goodbye forever.
Octal450
 
Posts: 4398
Joined: Tue Oct 06, 2015 12:51 pm

Re: Simulating IRS Allignment

Postby daweed » Sun Jun 05, 2016 9:43 am

@lego, @it0uchpods i am working to update my last branch (A330_Transponder) with the existing IRS branch
Linux Mint 18.3
AMD FX 4300 Quad-Core Black Edition|20 Go RAMGeForce GTX 750 Ti
FG Interface
Lyon Saint Exupery Scenery

ATC on LFLL on Friday 19:00 UTC => 22:00 UTC
daweed
 
Posts: 324
Joined: Thu Dec 11, 2014 10:45 am
Location: LFKP LFLL
Callsign: daweed
OS: Linux Mint 19.2


Return to Systems

Who is online

Users browsing this forum: No registered users and 1 guest