Author/Authors :
N.F. Thornhill، نويسنده , , B. Huang and
H . Zhang، نويسنده ,
Latin Abstract :
This article addresses the detection of oscillations in measurements from chemical processes including the case when two or more
oscillations of different frequency are present simultaneously. The presence of oscillations in selected frequency ranges is determined
using a new method based on the regularity of the zero crossings of filtered autocovariance functions. The work is motivated by and
illustrated with industrial data that exhibit multiple plant-wide oscillations. Issues of practical implementation in an automated tool
are discussed.
NaturalLanguageKeyword :
Power spectrum , Process operation , autocorrelation , Autocovariance , chemical industry , Control loop , Fault diagnosis , oscillation , Performance analysis
