Control Performance Monitoring. Alf Isaksson, Alexander Horch ABB Corporate Research. PROST Seminar 22 January 200 2. Goal: detect and diagnose malfunctioning control loops. oscillation. or too high variance. Bad control manifests itself as. Methods needed to. detect oscillations
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Alf Isaksson, Alexander Horch
ABB Corporate Research
PROST Seminar22 January 2002
Since there are hundreds of loops methods should beautomatic
0 = no oscillation, 1 = perfect osc.
Oscillation index trend plot
Cross-correlation method O.K.
No compressible media
Integration destroys the specific correlation in the stiction case.
CCF is even, no matter if stiction or not.
Re-calculation (differentiation) does not solve the problem
level control loop
dt2Use Camel method also for self-regulatingprocesses!
Is this good or bad?
Theoretically opt variance
Part of ABB Industrial IT concept and uses the new Aspect Integrator Platform (AIP).
Consists of three Aspects:
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