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

From: Gautier Hattenberger
Subject: Re: [Paparazzi-devel] one crash today, reach MAX_DIST_FROM_HOME, PID problem ?
Date: Tue, 22 Jul 2014 23:03:50 +0200
User-agent: Mozilla/5.0 (X11; Linux i686; rv:24.0) Gecko/20100101 Thunderbird/24.6.0


This is interesting. A few seconds after entering HOME mode, the course control was correctly giving orders, but the desired roll value stopped following them, so the plane have gone straight instead of flying back to home. Which version of paparazzi are you using ? (run ./paparazzi_version in the paparazzi base directory).

Also, a few comments on your flight:
- you should select the takeoff block *before* flying and not already in flight, even if your takeoff is in manual/auto1 - if you forgot to do it and select it in flight, it will not resurrect the motor because the exception in this block (AC alt > 25m above ground) will deroute to Standby block without calling the instruction that sets the motor on. But you can do it by hand with the button in the strip (the green turning arrows) if you have the default_fixedwing.xml settings in you plane configuration. - don't do a geo_init while flying, it will move all your waypoints and ground alt reference according to the current position, that's why you flew almost 100 meters higher than expected.


Le 21/07/2014 23:43, afishindouban a écrit :
Dear all

Today I try to tuning my new fix-wing with Lisa/M2, initially was good, but
last flight I made a mistake,  one way point is too close to the bordering,
so MAX_DIST_FROM_HOME fail-safe trigger executed. But I don’t know why, AC
can not return to home, and fly farther, finally kill trigger executed after
get 1.5 time of MAX_DIST_FROM_HOME. and the glide to ground, Fortunately,
the plane landed in the treetops, with gentle pitch down, so nothing get

Someone can have a look at this log file, and give me some suggestion for
How I can tune it better ? or I have made other mistake?  attached log and
data files. for check it, Please change the name to log.tar.gz

thank you so much.


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