GMC-I Messtechnik GmbH
R2500–24
Adaptive Measured Value Correction
If a control loop is interfered with by periodic disturbance of the actual value, control can be improved by activating adaptive measured value correction.
Periodic disturbance is thus suppressed, without impairing the controller’s ability to react to system deviations. Correction is adapted to the oscillation
amplitude of the disturbance to this end, and only the mean value is forwarded to the controller.
Adaptation of correction to the disturbance is matched to prevailing control dynamics and requires no further parameters.
Prerequisites for
improved
control:
– The oscillation amplitude of the disturbance must be constant, or may only change slowly.
– The oscillation period must be less that half of the system’s delay time (parameter
tu
).
Due to the fact that correction greatly influences actual value ascertainment, control may also be
worsened
, for example if:
– Measured value deviations are irregular
– Individual measured value outliers occur
– Fluctuation is not periodic
– The disturbance is noise-like
Содержание R2500
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