Siemens SINAMICS DCM Operating Instructions Manual page 285

Controller optimization
Procedure
● Set the function generator to a triangular waveform with
● Supply point: p50625[C] (see function diagram 6810)
● Record signals r52174 (n-set) and r52167 (n-act)
Assessment
If the step response of the speed controller is recorded after performing the optimization run
for the speed controller, then the significant increase of the setpoint step can be clearly seen
- which is characteristic for optimization according to the symmetrical optimum.
A controller adjusted according to the symmetrical optimum has a significant overshoot,
however, a favorable response to disturbances.
This optimization has especially established itself in drive technology as many systems
require a good disturbance variable compensation. This is the reason why the optimization
run for the speed controller sets the controller parameters according to the symmetrical
optimum.
An improved response to setpoint changes with the response to disturbances remaining the
same can be achieved using the reference model. See Chapter "Function descriptions",
Section "Speed controller".
SINAMICS DCM DC Converter
Operating Instructions, 1.2012, C98130-A7066-A1-05-7619
step height = 5 %
offset = 10 %
period = 1000 ms
pulse width = 500 ms
Commissioning
8.8 Manual optimization
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