On Thu, 2002-02-14 at 02:39, Erik Hofman wrote:
> Alex Perry wrote:
> > That's the same error I have on the C172 at simulator startup. FYI.
>
> A crash at startup is mostly because of stale objects files hanging
> around. I think you should do a "make clean" in src/FDM/JSBSim and
> remove src/FDM/JSBSim.o and try again.
>
> >
> >>JSBsim C310 crashes the sim on gear retraction.
> >>
> >>$PATLA,117.30,119.0,111.80,29.0,266*69
> >>182: GEAR_CONTACT 1
> >>183: Crash Detected
> >>184: GEAR_CONTACT 1
> >>185: Crash Detected
> >>186: GEAR_CONTACT 1
> >>187: Crash Detected
> >>188: GEAR_CONTACT 1
> >>189: Crash Detected
> >>190: GEAR_CONTACT 1
> >>191: Crash Detected
> >>192: GEAR_CONTACT 1
> >>193: Crash Detected
> >>194: GEAR_CONTACT 1
> >>195: Crash Detected
> >>Tile not found (Ok if initializing)
> >>Attempting to schedule tiles for bogus latitude and
> >>longitude. This is a FATAL error. Exiting!
>
> This gets fixed by this patch:
>
> --- /home/erik/src/CVS/fgfs/JSBSim/FGLGear.cpp Fri Jan 25 21:10:22 2002
> +++ FGLGear.cpp Thu Feb 14 11:26:01 2002
> @@ -189,9 +189,11 @@
>
> if (isRetractable) {
> if (FCS->GetGearPos() < 0.01) {
> + FCS->SetGearPos(0.0);
> GearUp = true;
> GearDown = false;
> } else if (FCS->GetGearPos() > 0.99) {
> + FCS->SetGearPos(1.0);
> GearDown = true;
> GearUp = false;
> } else {
>
>
> Ths problem is that GearPos is decreased to it lowest maximum value
> somewhere in the retraction code.
> I suspect there is a check for == 0 where < 0.01 would be more apropriate.
>
> Erik
In as far as the gear are concerned, once FCS->GetGearPos() is below
0.01 or above 0.99, the gear are up and locked or down and locked
respectively so FCS->GetGearPos() ceases to have any meaning.
(that's what the code above does)
>
>
>
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--
Tony Peden
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We all know Linux is great ... it does infinite loops in 5 seconds.
-- attributed to Linus Torvalds
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