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Re: [Paparazzi-devel] PPRZ auto2 signal is unstable

From: Chris Gough
Subject: Re: [Paparazzi-devel] PPRZ auto2 signal is unstable
Date: Mon, 23 Sep 2013 19:38:08 +1000

> I don't know how to set the receiver failsafe, can it set by"radio" or 
> "airframe" file?

What I mean by radio failsafe is this: what happens if you turns off your RC 
transmitter? It's not set in paparazzi anywhere, it's the input to paparazzi 
from your RC equipment.

What sort of RC equipment are you using?.

The autopilot has no way of knowing if the signal to paparazzi from the RC 
equipment is being sent from a transmitter or from behavior of the receiver 
when it looses reception of the RC commands.

I suggest you test it on the bench with the message tool program. Make sure you 
are sending RC messages, and watch what happens to the RC message when you turn 
your transmitter off... There are only 2 acceptable alternatives, either you 
stop getting RC messages or the mode channel puts you into AUTO2. Anything else 
then you have a problem and probably need to reconfigure your receiver, because 
your receiver is telling your autopilot to do the wrong thing.

> Actually, I'm not sure how to set the PPRZ's failsafe mode too...

The defaults are probably OK, but that's not important if your receiver is 
giving the wrong message to your autopilot.

It might be something else of course, this just seems to me to be the simplest 
explanation for your problem.

Chris Gough 

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