Dedalus autopilot– user's manual
Figure
8
Impact of incorrect autopilot location on model flight
Small, on the order of few degrees autopilot orientation errors can be
compensated in menu settings,
Settings->pitch cor.
for pitch and
settings-
>roll cor.
for roll. Perfect location (or perfect compensation) is reached when
properly trimmed model flies straight and horizontal in autopilot OFF mode,
and the attitude stays same when you turn stabilization on.
Autopilot board does not have to be fixed exactly in the model’s center of
gravity, other convenient places inside the model can be used.
Vibration protection
Autopilot should be protected against vibrations (which affects the position
sensors: accelerometers and gyroscopes). If needed, you can use special
dampers, sponge, thick double-sided tape or other methods. Dampers should
dampen vibrations but still keep autopilot in correct orientation, and they
should not resonate (do not use springs ).
The vibration level can be checked with the engine running using
FPV_manager.exe PC application.
The sensors and algorithms of the autopilot are designed to operate in
presence of certain vibrations, but keep in mind that during the flight, there
are additional loads (turbulence, the centrifugal force, etc.). Generally, the
lower the vibration, the more accurate is the autopilot. You must therefore
strive to achieve a minimum level of vibrations from the engine.
NOTE
: Too high level of vibrations can cause model flying tilted or not
straight in stabilization and autonomous flight modes.
Magnetic noise prevention
The autopilot and GNSS receiver board have magnetometers that used to
measure Earth magnetic field and determine the magnetic course. Every
magnetic field other than the Earth's can be an interference source. Try to
avoid putting permanent magnets, such as for holding the canopy, closer that
20cm from the autopilot.
Electric wires, especially the ones conducting high currents for the motor
should be arranged parallel to each other and tied together to prevent
making magnetic loop during current flow.
The magnetometer sensor is placed on the autopilot board near the „a”
character of the Dedalus logo. If you have to place wires near autopilot, place
them near opposite side like on picture below.
© PitLab 2015
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