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Re: [Paparazzi-devel] one crash today, reach MAX_DIST_FROM_HOME, PID pro

Subject: Re: [Paparazzi-devel] one crash today, reach MAX_DIST_FROM_HOME, PID problem ?
Date: Wed, 23 Jul 2014 16:34:15 -0700 (PDT)

in simulation there is no this kind is behave. It always can come back home. I don't know maybe it is a IMU failure ?

About the gap between desired roll and roll in the standby cycle, I think it is my nuetral trim roll need to be adjusted.

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On Wed, Jul 23, 2014 at 4:11 PM, Gautier Hattenberger <address@hidden> wrote:


The GCS shows an estimated wind of 7m/s, which is almost half of your
flight speed, so the evolution of the desired roll looks normal to me on
the first plot.
On the second one, everything is normal, except the part where the
desired roll stays constant a few seconds after entering home mode.
Unfortunately, I don't have an explanation for this right now. Could you
try to make a simulation of your flight to see if the behavior is the
same or not (it is working as expected for me) ?


Le 23/07/2014 18:23, afishindouban a écrit :
> someone can have a look and give me some guide?
> <>
> This is standby roll and desired roll, why the desired roll is so trembled
> and unstable, wind is one reason, I think other is some parameter is not
> right. maybe course pgain is too big ? or roll pgain, roll rate pgain has
> problem? also you can see always between desired and actully roll there is
> about 5 degree gap, what is the reason for that?
> <>
> Here is the roll analyse of the last phase before it kill and crash. i saw
> roll is following desired roll, but looks like the nav course loop give a
> wrong result?
> Please some one can have a look at it. thank you so much
> Kevin
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