Title:
METHOD AND SYSTEM FOR OBTAINING VALID OSCILLATING COMPONENTS
Document Type and Number:
WIPO Patent Application WO/2014/091335
Kind Code:
A3
Abstract:
The invention provides a method for obtaining valid oscillating components from raw process data in a process plant. The method includes applying a decomposition technique on the raw process data to obtain oscillating components having period values. These period values may be subjected to statistical treatment or be used as such to obtain applicable period values. Then, a regularity check is performed on the applicable period values to obtain first level valid oscillating components. Noise level in a process is estimated from the time series data, which is used to remove noisy oscillating components from the first level valid oscillating components to obtain second level valid oscillating components. The invention further includes clustering the second level valid oscillating components into unique oscillating components based on a mean period distance between given oscillating components.
Inventors:
P AADALEESAN (IN)
N ULAGANATHAN (IN)
KARIWALA VINAY (IN)
KUBAL NANDKISHOR (IN)
HORCH ALEXANDER (CH)
N ULAGANATHAN (IN)
KARIWALA VINAY (IN)
KUBAL NANDKISHOR (IN)
HORCH ALEXANDER (CH)
Application Number:
PCT/IB2013/060266
Publication Date:
January 29, 2015
Filing Date:
November 20, 2013
Export Citation:
Assignee:
ABB RESEARCH LTD (CH)
International Classes:
G06F17/14; G05B11/42; G05B23/02
Other References:
XINONG LI ET AL: "The DCT-based oscillation detection method for a single time series", JOURNAL OF PROCESS CONTROL, vol. 20, no. 5, June 2010 (2010-06-01), pages 609 - 617, XP055144384, ISSN: 0959-1524, DOI: 10.1016/j.jprocont.2010.02.012
SALSBURY T I ET AL: "A new approach for ARMA pole estimation using higher-order crossings", AMERICAN CONTROL CONFERENCE, 2005. PROCEEDINGS OF THE 2005 PORTLAND, OR, USA JUNE 8-10, 2005, IEEE, PISCATAWAY, NJ, USA, 8 June 2005 (2005-06-08), pages 4458 - 4463, XP010820504, ISBN: 978-0-7803-9098-0, DOI: 10.1109/ACC.2005.1470698
THORNHILL N F ET AL: "Detection of multiple oscillations in control loops", JOURNAL OF PROCESS CONTROL, OXFORD, GB, vol. 13, no. 1, February 2003 (2003-02-01), pages 91 - 100, XP002554541, ISSN: 0959-1524, [retrieved on 20020130], DOI: 10.1016/S0959-1524(02)00007-0
ANONYMOUS: "Wikipedia entry for "outlier"", WIKIPEDIA, 10 December 2012 (2012-12-10), pages 1 - 7, XP055146899, Retrieved from the Internet [retrieved on 20141015]
THORNHILL ET AL: "Advances and new directions in plant-wide disturbance detection and diagnosis", CONTROL ENGINEERING PRACTICE, PERGAMON PRESS, OXFORD, GB, vol. 15, no. 10, 31 July 2007 (2007-07-31), pages 1196 - 1206, XP022180035, ISSN: 0967-0661, DOI: 10.1016/J.CONENGPRAC.2006.10.011
SALSBURY T I ET AL: "A new approach for ARMA pole estimation using higher-order crossings", AMERICAN CONTROL CONFERENCE, 2005. PROCEEDINGS OF THE 2005 PORTLAND, OR, USA JUNE 8-10, 2005, IEEE, PISCATAWAY, NJ, USA, 8 June 2005 (2005-06-08), pages 4458 - 4463, XP010820504, ISBN: 978-0-7803-9098-0, DOI: 10.1109/ACC.2005.1470698
THORNHILL N F ET AL: "Detection of multiple oscillations in control loops", JOURNAL OF PROCESS CONTROL, OXFORD, GB, vol. 13, no. 1, February 2003 (2003-02-01), pages 91 - 100, XP002554541, ISSN: 0959-1524, [retrieved on 20020130], DOI: 10.1016/S0959-1524(02)00007-0
ANONYMOUS: "Wikipedia entry for "outlier"", WIKIPEDIA, 10 December 2012 (2012-12-10), pages 1 - 7, XP055146899, Retrieved from the Internet
THORNHILL ET AL: "Advances and new directions in plant-wide disturbance detection and diagnosis", CONTROL ENGINEERING PRACTICE, PERGAMON PRESS, OXFORD, GB, vol. 15, no. 10, 31 July 2007 (2007-07-31), pages 1196 - 1206, XP022180035, ISSN: 0967-0661, DOI: 10.1016/J.CONENGPRAC.2006.10.011
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