Finally got the last pieces in the mail and put the quad together. The new GPS antenna is working very well and I get a good GPS lock while the camera is streaming over the modem:
I’ve just had the first test flights and I am trying to get the PID settings right, but I suspect there could be some problems with vibrations or the accelerometers. Here is a graph of the IMU log:
AccX: blue, AccY: red, AccZ: green
The y and z signal seems good, and the amount of vibrations is quite low, but the x signal looks strange to me. First of all the amplitude it is very large and all in one direction. Is this normal?..
Further, if there were serious problems with vibrations, should it not be present in the other axis’s too? Could it be a hardware problem with the sensors?
The props are well balanced, and by just holding the quad it does not seem to vibrate much at all.