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11 Optimisation
11.3 Fuzzy parameters
In addition to the algorithms for the
various controller structures, the con-
troller software also includes a fuzzy
module. This can be used to improve
both the control and the disturbance
response of controllers with I-action.
When the fuzzy module is activated,
the output y is made up of the control-
ler output and the output signal of the
fuzzy module.
The parameter Fc1 affects the intensity of the fuzzy signal:
Fc1 = 0: Fuzzy module not activated
0<Fc1≤ 100: Fuzzy module activated
If the fuzzy module activated by Fc1 makes corrections to the output y,
the reset time T
n
is influenced during correction.
The parameter Fc2 is used to adjust the degree of influence on the reset time
T
n
.
Fc2 = 0: no influence on T
n
0<Fc2≤ 100: influence on T
n
When supplied, and also after self-optimisation, the fuzzy parameters are set
to Fc1 = 0 and Fc2 = 30.
The fuzzy module can be activated at any time by setting Fc1 > 0.
The setting Fc2 = 30 is suitable for many applications. The optimum setting
can be determined with the help of the table below.
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