Multiplex WINGSTABI Erweiterte Anleitung Seite 56

Proportional (P input)
The P input of the PID regulation reacts quickly to regulation deviations. This is a factor
of the recognized regulation error (deviation between the actual and setpoint values).
The main input of the regulation comes from the P input.
Sensitivity
If the P input is set too low, the control feeling can be too "soft". The axis ratchet also
feels very soft and sluggish in this case. If, however, the P input is set too high, the
corresponding axis can oscillate quickly. It also oscillates when the stick returns to the
center.
Integral (I input)
The I input is the so-called "heading hold" input. Here, the regulation errors are added
up and used for stabilization. It is the "memory" of the regulation: If a model using I
inputs rotates, the model rotates itself back to the initial position on its own. With P and
D factors, rotating of the model is actively regulated against. If, however, the model still
rotates, it stays in the new position. The I regulation reacts relatively slowly.
Sensitivity
If the I input is set too low, the flight attitude of the fixed-wing model is not maintained
well. If the rudders are trimmed or if there are any wind effects, the model may drift. If
the I input is set too high, the corresponding axis can oscillate slowly. An imprecise
effect can also be seen when the stick returns to the center.
Integrator size (maximum)
The maximum integrator size indicates how many "errors" the regulator can store. If the
model drifts off the desired flight direction due to wind, this value indicates how far the
model can be turned back in the original flight direction by the regulator.
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