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
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:
The result is summarized in a report, either as a text file or in Internet Explorer