IADS Google Group

Re: [IADS] Re: How to Derive equeation (impulse ->Pulse)

j...@iads-soft.com (James Bretz) — Thu, 10 Dec 2009 18:13:51 UT

;)

Re: How to Derive equeation (impulse ->Pulse)

hsb...@koreaaero.com (hsbaek@koreaaero.com) — Thu, 10 Dec 2009 08:20:09 UT

Thank Everybody

I take rotor data successfully

Detecting and Correcting Bad Data

j...@iads-soft.com (James Bretz) — Tue, 08 Dec 2009 21:47:22 UT

Hello,

I've noticed that there are a large number of people lately concerned with
correcting bad data (spikes, etc). It seems to be a hot topic. Anyway, I
just wanted to write some background info about the subject down to help get
everyone on the same page.

When we see spikes or bad data, sometimes it's hard to pinpoint the source

Re: [IADS] Re: CRC checker routine

ka...@iads-soft.com — Tue, 08 Dec 2009 18:06:36 UT

Ok Grant if you get a CRC in there let us know.

*On Tue Dec 8 9:55 , Grant sent:

Re: CRC checker routine

glichts...@cirrusdesign.com (Grant) — Tue, 08 Dec 2009 14:55:35 UT

Kathy, in fact the avionics people we are working with on this RS422
line had a good mind to put a 32-bit CRC at the end of their message.
I have yet to ask which CRC 'polynomial' their are using but I would
think that could be an input into the CRC checker feature. Because I
expect the problem to be noise in the 422 line that I am reading, I

Re: CRC checker routine

johnwork...@roadrunner.com (John Bretz) — Tue, 08 Dec 2009 17:25:08 UT

If the "0.0" case is the only real problem and your data isn't about
0.0 normally, a derived equation might help...

John

Re: CRC checker routine

p...@iads-soft.com (Pat) — Tue, 08 Dec 2009 12:21:23 UT

HI Grant,

Take a look at our spike detection/removal technique that removes
spikes that occur within the exepcted range of data, here is a prior
Google post to get help you get going, also checkout the help system
for proper setup

[link]

Re: CRC checker routine

ka...@iads-soft.com (Kathy Rodittis) — Tue, 08 Dec 2009 01:20:17 UT

We have talked to Acra about the possibility of including this feature
in general for PCM data sources. If that happens then we'll definitely
be implementing the cooresponding CRC routines on our side as well.

Does checking the decom status help at all in determining when to
"ignore" the data?

Re: CRC checker routine

ka...@iads-soft.com (Kathy Rodittis) — Tue, 08 Dec 2009 01:10:43 UT

Hi Grant-

We don't have any CRC routines right now. But even if we did, without
the hardware's cooperation, I'm not sure it would do you any good
since you need something to "inject" the correct CRC within the data
stream before our software can use it to validate the incoming data.
Do you have a way to include a CRC in the original data source?

Re: [IADS] Re: How to Derive equeation (impulse ->Pulse)

j...@iads-soft.com (James Bretz) — Tue, 08 Dec 2009 00:54:39 UT

RE: How to translate (impulse -> pulse) for use in the Helicopter functions.

Here's a simpler version of the equation. It will also handle the impulse
value being > 1:

1) Create a derived parameter and name it "pBlib"
2) Set the derived parameter equation to

iBlib > Prev( iBlib, 1 ) ? !pBlib : pBlib

CRC checker routine

glichts...@cirrusdesign.com (Grant) — Mon, 07 Dec 2009 23:26:43 UT

Greetings all,

I am reading some RS-422 data that seems pretty spiky. Wild point
removal doesn't quite seem to fit the bill as there are often dropouts
that go to zero (or inside the range of what can be expected) instead
of +/- infinity. I was hoping that there was a crc routine that could

Re: Derive Equation

hsb...@koreaaero.com (hsbaek@koreaaero.com) — Mon, 07 Dec 2009 21:30:24 UT

I post this situation file name is Rotor blib derive.ppt

Re: Video card with GSX-500

mjo...@iads-soft.com (Michael Jones) — Mon, 07 Dec 2009 17:51:25 UT

We typically recommend the nVidia Quadro line of video cards for use
with IADS.

Re: Video card with GSX-500

ka...@iads-soft.com (Kathy Rodittis) — Mon, 07 Dec 2009 17:57:35 UT

Hi Murat-

We like nVidia cards: GeForce 6xxx+ or Quadro 3xxx. If you go to the
"Pages" portion of the IADS Google group, you can see a list of our of
hardware specifications:

[link]

-Kathy

Video card with GSX-500

mi...@tai.com.tr — Mon, 07 Dec 2009 14:09:50 UT

Could you help me about video card to work with GSX-500 ?, I am planning to buy new high performance video card for my workstation pc,
Do you have any recommendation about this issue?
Thanks for Interest
Best Regard

Murat IMAY
Flight Test Instrumentation Engineer
TAI - Turkish Aerospace Ind.,Inc