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Permalink Reply by james a on June 11, 2010 at 8:22am

additional questions

is the gps required for the DCM to work if i only want pitch attitude?

which ardu-imu would be best suited to my need?

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Permalink Reply by Daniel Wee on June 12, 2010 at 7:44am

Get the ArduIMU+ V2. Load up arduimu.pde and the rest of the files will load automatically. The GPS while not absolutely necessary, supposedly helps with centripetal force corrections in dynamic situations. It all depends on the type of application you have in mind. If you have a static application - you can save a lot of trouble by just using a tri-axis accelerometer.

Daniel

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Permalink Reply by Doug Weibel on June 13, 2010 at 6:39pm

If you are truly only interested in pitch AND the IMU will always have it's X axis aligned with its motion (this is the general assumption in the DCM code and why it works for airplanes but not for helicopters) then no, you do not need the gps to get good pitch information.

If you are trying to reduce the size of the code you can delete the gps files, the pressure altitude file and the compass file. However, you may need to patch the code a bit to compile with these files absent.

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Permalink Reply by james a on June 15, 2010 at 1:52am

http://www.arduino.cc/cgi-bin/yabb2/YaBB.pl?num=1267759859 seams to offer a solution without messing around with code i dont understand.

i am also looking for any info on 'autopilot feedback control loops?' to control pitch through a rudder on something like this thing given that X axis pointing forward, Y axis running through the kite string and Z axis pointing down running through the wing.

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