Carlos Diaz
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CAM-Messages missing

Started Aug 18, 2015 0 Replies

Hi everyone!I have a fixed wing with a pixhawk (arduplane ver 3.2.0) and a sony alpha 6000 triggered by wire.Last weekend I flown a photogrammetric mission of about 120 hectareas.The CAM_TRIGG_DIST…Continue

Pixhawk lockup and plane crash

Started this discussion. Last reply by Andre K. Dec 22, 2014. 14 Replies

Hello everyone,I'm new on the forum, and in the autopilot world as well. I need some help to understand what happened with my plane.I was flying in FBWA mode tuning the PID as described in the…Continue

Tags: crash, problem, failure, fail, lockup

 

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Carlos Diaz posted a discussion

CAM-Messages missing

Hi everyone!I have a fixed wing with a pixhawk (arduplane ver 3.2.0) and a sony alpha 6000 triggered by wire.Last weekend I flown a photogrammetric mission of about 120 hectareas.The CAM_TRIGG_DIST was set to 19 m and the mission was flown at 18 m/s. So it was roughly 1 picture per second.The thing is that when I landed I have on my camera 978 pictures taken but, when I download the LOG file from the pixhawk, it have only 976 CAM trigg messages.Is it possible that pixhawk have missed some…See More
Aug 18, 2015
Andre K. replied to Carlos Diaz's discussion Pixhawk lockup and plane crash
"I2CErr isnt logging anything, it's simply unused in current firmware. do you have very long I2C cables ?"
Dec 22, 2014
Michael replied to Carlos Diaz's discussion Pixhawk lockup and plane crash
"we first went into FBWA mode and then manual. Managed to recover 5 m from the ground. Having now also looked at the I2CErr log i see no problem with this signal. Bit of a mystery. Should fly again in the next few days and will give an update if I…"
Dec 22, 2014
Federico Lanzi replied to Carlos Diaz's discussion Pixhawk lockup and plane crash
"Michael, How did you recover the plane from losing altitude? did you pass to manual control ? Rgds."
Dec 22, 2014
Michael replied to Carlos Diaz's discussion Pixhawk lockup and plane crash
"i have recently installed apmplane 3.2. During an auto flight we lost altitude which almost resulted in a crash. When looking at the data flash log i saw we were getting negative spikes on the I2C log. I checked earlier logs and did not see a…"
Dec 22, 2014
Carlos Diaz replied to Carlos Diaz's discussion Pixhawk lockup and plane crash
"Thank you all guys for your answers. I will try with the new 3.2.0 release!"
Nov 26, 2014
Andre K. replied to Carlos Diaz's discussion Pixhawk lockup and plane crash
"oops ! - thank you for telling us that,   :)"
Nov 26, 2014

Developer
Andrew Tridgell replied to Carlos Diaz's discussion Pixhawk lockup and plane crash
"Hi Carlos, based on your description it is quite likely that this was the I2C bug that was fixed in the 3.2.0 release. The ignition system from a gas plane can give quite a lot of RF noise, and can cause I2C errors. I fly gas planes myself, and…"
Nov 26, 2014

Developer
Andrew Tridgell replied to Carlos Diaz's discussion Pixhawk lockup and plane crash
"unfortunately we don't log I2C errors on Pixhawk - the errors are hidden in the NuttX layer. That can be fixed, and I have it as a todo item for 3.2.1, but the zero value for I2Cerr error right now doesn't actually mean anything"
Nov 26, 2014
Andre K. replied to Carlos Diaz's discussion Pixhawk lockup and plane crash
"except of power issues (power loss, brownout) I have no known reasons.  - and yes, I too think that might have crashed your plane, just pointed out it's hard to *know*. You could check your logs for PM/I2CErr , (I've never seen…"
Nov 26, 2014
Federico Lanzi replied to Carlos Diaz's discussion Pixhawk lockup and plane crash
"Andre, based on your experience, would you say what other reasons could cause a lockup?"
Nov 26, 2014
Andre K. replied to Carlos Diaz's discussion Pixhawk lockup and plane crash
"yes, but it's hard to know how "extended" cables here were performing, the I2C bug needed poor signals or much traffic to kick in, so it's hard to say for sure if it was the reason."
Nov 26, 2014
iskess replied to Carlos Diaz's discussion Pixhawk lockup and plane crash
"Tridge just released 3.2 that fixes the I2C bug that was causing lock ups."
Nov 25, 2014

Admin
Thomas J Coyle III replied to Carlos Diaz's discussion Pixhawk lockup and plane crash
"@Carlos, Have you installed the zener diode on the Pixhawk servo output power bus? "When powering Pixhawk off the servo rail, we recommend adding a Zener diode (part number 1N5339) to condition the power across the rail and prevent it from…"
Nov 25, 2014
Federico Lanzi replied to Carlos Diaz's discussion Pixhawk lockup and plane crash
"Guys, Any thought on this? I have experienced a similar issue, and many doubts about reliability come to me mind.   has anyone suffered a lockup like this?   thanks Rgds. "
Nov 25, 2014
Carlos Diaz posted a discussion

Pixhawk lockup and plane crash

Hello everyone,I'm new on the forum, and in the autopilot world as well. I need some help to understand what happened with my plane.I was flying in FBWA mode tuning the PID as described in the manual.Suddenly, the motor stopped, the plane got unresponsive and crash on the land.When we found the plane, luckly the battery was still plugged. Here are some thing we were able to see:1- The multi color led was Green, even with the radio turned off.2- Turning on the radio, there was not servo…See More
Nov 20, 2014

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Please tell us a bit about your UAV interest
I´m interested in fixed wn¿ing UAV for photogrametry work
Hometown:
Mendoza, Argentina

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