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Re: [Paparazzi-devel] Lisa/M: Pitching Reversed and Rolling is Pitching

From: Helge Walle
Subject: Re: [Paparazzi-devel] Lisa/M: Pitching Reversed and Rolling is Pitching
Date: Tue, 31 Jan 2012 10:52:59 +0100

From your airframe file it seems you have elevon mixing, like the one for the Multiplex Funjet.
If your plane is an "ordinary" one with elevator, aileron and rudder you shouldn't have that.
Also your Tx should not have any mixing.

If your plane is an ordinary one you should look to the servos and command_laws sections in a file like twinstar_example.xml.
In that file you don't have any mixing between elevator and aileron. If you have only one aileron servo you could simplify the airframe file even more.
If it is of any interest I have working airframe files for Multiplex Funjet and Twinstar2 and could email them to you.

2012/1/31 Roman Krashanitsa <address@hidden>
Chris, also make sure you have all your changes actually written to the autopilot. Otherwise your XML files show one thing and your firmware has completely different things.

2012/1/30 Chris Wozny <address@hidden>

After having fixed the servo deflection cut-off problem, I have run
into a situation which lacks documentation on the wiki (hopefully I
can update it once it's fixed!) The aircraft's servos will pitch up
when rolling left and pitch down when rolling right. Then pitching up
and down is reversed when using the right stick vertically. The
pitching up/down being reversed I can deal with, but I have no idea
why my aircraft is pitching when it's being told to roll. Also, the
deflection is a little funky. I've included a video of everything I
just expressed since a picture is worth a thousand words, then a video
should be worth many millions :)

Also, here are the configuration files I'm currently using (you'll
have to view source in case your browser tries to render the XML

I don't have access to any messages from the GCS since I haven't yet
tried the XBee Pro 900 MHz modems with Lisa/M.

University of Arizona MAV

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