Use of Cross Wavelet Transform for Diagnosis of Oscillations Due to Multiple Sources
S. Sivalingam, M. Hovd
NTNU Trondheim
Abstract
Oscillations are the most prominent indications of deteriorated controller performance. Control loop oscillations are a common type of plant-wide disturbance and the root-causes can be one or more among poorly tuned controllers, process or actuator non-linearities, presence of model plant mismatch and oscillatory disturbances. This article addresses detection and diagnosis of oscillations in measurements due to multiple sources under a framework of internal model control. A pattern recognition based approach using cross wavelet transforms is proposed to pinpoint the source(s) of oscillation in the control loops. The phase information in wavelet domain between input and output signals is exploited to diagnose the source(s) of oscillations.
Full paper
Session
Modelling, Simulation, and Identification of Processes (Lecture)
Reference
Sivalingam, S.; Hovd, M.: Use of Cross Wavelet Transform for Diagnosis of Oscillations Due to Multiple Sources. Editors: Fikar, M. and Kvasnica, M., In Proceedings of the 18th International Conference on Process Control, Tatranská Lomnica, Slovakia, June 14 – 17, 443–451, 2011.
BibTeX
| @inProceedings{pc2011-015, | ||
| author | = { | Sivalingam, S. and Hovd, M.}, |
| title | = { | Use of Cross Wavelet Transform for Diagnosis of Oscillations Due to Multiple Sources}, |
| booktitle | = { | Proceedings of the 18th International Conference on Process Control}, |
| year | = { | 2011}, |
| pages | = { | 443-451}, |
| editor | = { | Fikar, M. and Kvasnica, M.}, |
| address | = { | Tatransk\'a Lomnica, Slovakia}, |
| publisher | = { | Slovak University of Technology in Bratislava}, |
| url | = { | http://www.kirp.chtf.stuba.sk/pc11/data/papers/015.pdf}} |