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Publications (10 of 158) Show all publications
Chistiakova, T., Wigren, T. & Carlsson, B. (2018). Input–output stability design of an ammonium based aeration controller for wastewater treatment. In: Proc. American Control Conference: ACC 2018. Paper presented at ACC 2018, June 27–29, Milwaukee, WI (pp. 2964-2971). American Automatic Control Council
Open this publication in new window or tab >>Input–output stability design of an ammonium based aeration controller for wastewater treatment
2018 (English)In: Proc. American Control Conference: ACC 2018, American Automatic Control Council , 2018, p. 2964-2971Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
American Automatic Control Council, 2018
National Category
Control Engineering
Identifiers
urn:nbn:se:uu:diva-349422 (URN)10.23919/ACC.2018.8431151 (DOI)978-1-5386-5428-6 (ISBN)
Conference
ACC 2018, June 27–29, Milwaukee, WI
Available from: 2018-08-16 Created: 2018-04-27 Last updated: 2018-08-27Bibliographically approved
Wigren, T. & Schoukens, M. (2017). Coupled electric drives data set and reference models.
Open this publication in new window or tab >>Coupled electric drives data set and reference models
2017 (English)Report (Other academic)
Series
Technical report / Department of Information Technology, Uppsala University, ISSN 1404-3203 ; 2017-024
National Category
Control Engineering
Identifiers
urn:nbn:se:uu:diva-336281 (URN)
Available from: 2017-11-29 Created: 2017-12-13 Last updated: 2018-08-17Bibliographically approved
Middleton, R. H., Wigren, T., Lau, K. & Delgado, R. A. (2017). Data flow delay equalization for feedback control applications using 5G wireless dual connectivity. In: Proc. 85th Vehicular Technology Conference: . Paper presented at VTC Spring 2017, June 4–7, Sydney, Australia. Piscataway, NJ: IEEE
Open this publication in new window or tab >>Data flow delay equalization for feedback control applications using 5G wireless dual connectivity
2017 (English)In: Proc. 85th Vehicular Technology Conference, Piscataway, NJ: IEEE, 2017Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Piscataway, NJ: IEEE, 2017
National Category
Communication Systems
Identifiers
urn:nbn:se:uu:diva-334211 (URN)10.1109/VTCSpring.2017.8108608 (DOI)978-1-5090-5932-4 (ISBN)
Conference
VTC Spring 2017, June 4–7, Sydney, Australia
Available from: 2017-11-16 Created: 2017-11-21 Last updated: 2018-08-17Bibliographically approved
Lau, K., Goodwin, G. C., Wigren, T. & Brus, L. (2017). Improving the performance of cellular uplinks via power overbooking. IET Communications, 11(9), 1512-1518
Open this publication in new window or tab >>Improving the performance of cellular uplinks via power overbooking
2017 (English)In: IET Communications, ISSN 1751-8628, E-ISSN 1751-8636, Vol. 11, no 9, p. 1512-1518Article in journal (Refereed) Published
National Category
Communication Systems
Identifiers
urn:nbn:se:uu:diva-328370 (URN)10.1049/iet-com.2016.1068 (DOI)
Available from: 2017-07-13 Created: 2017-08-22 Last updated: 2018-08-17Bibliographically approved
Wigren, T. (2017). Loop-shaping feedback and feedforward control for networked systems with saturation and delay. Asian journal of control, 19(4), 1329-1349
Open this publication in new window or tab >>Loop-shaping feedback and feedforward control for networked systems with saturation and delay
2017 (English)In: Asian journal of control, ISSN 1561-8625, E-ISSN 1561-8625, Vol. 19, no 4, p. 1329-1349Article in journal (Refereed) Published
National Category
Communication Systems
Identifiers
urn:nbn:se:uu:diva-333533 (URN)10.1002/asjc.1442 (DOI)000406934300008 ()
Available from: 2016-12-07 Created: 2017-11-15 Last updated: 2018-08-17Bibliographically approved
Wigren, T. (2017). MATLAB software for nonlinear and delayed recursive identification: Revision 1.
Open this publication in new window or tab >>MATLAB software for nonlinear and delayed recursive identification: Revision 1
2017 (English)Report (Other academic)
Series
Technical report / Department of Information Technology, Uppsala University, ISSN 1404-3203 ; 2017-007
National Category
Control Engineering
Identifiers
urn:nbn:se:uu:diva-334220 (URN)
Available from: 2017-04-20 Created: 2017-11-21 Last updated: 2018-08-17Bibliographically approved
Wigren, T. (2017). Networked and delayed recursive identification of nonlinear systems. In: Proc. 56th Conference on Decision and Control: . Paper presented at CDC 2017, December 12–15, Melbourne, Australia (pp. 5851-5858). Piscataway, NJ: IEEE
Open this publication in new window or tab >>Networked and delayed recursive identification of nonlinear systems
2017 (English)In: Proc. 56th Conference on Decision and Control, Piscataway, NJ: IEEE, 2017, p. 5851-5858Conference paper, Published paper (Refereed)
Place, publisher, year, edition, pages
Piscataway, NJ: IEEE, 2017
National Category
Control Engineering
Identifiers
urn:nbn:se:uu:diva-348330 (URN)10.1109/CDC.2017.8264544 (DOI)000424696905102 ()978-1-5090-2873-3 (ISBN)
Conference
CDC 2017, December 12–15, Melbourne, Australia
Available from: 2018-01-23 Created: 2018-04-23 Last updated: 2018-08-17Bibliographically approved
Chistiakova, T., Carlsson, B. & Wigren, T. (2017). Non-linear modelling of the dissolved oxygen to ammonium dynamics in a nitrifying activated sludge process. In: Proc. 12th IWA Specialized Conference on Instrumentation, Control and Automation: . Paper presented at ICA2017, June 11–14, Québec, Canada (pp. 85-93).
Open this publication in new window or tab >>Non-linear modelling of the dissolved oxygen to ammonium dynamics in a nitrifying activated sludge process
2017 (English)In: Proc. 12th IWA Specialized Conference on Instrumentation, Control and Automation, 2017, p. 85-93Conference paper, Published paper (Refereed)
National Category
Control Engineering
Identifiers
urn:nbn:se:uu:diva-334201 (URN)
Conference
ICA2017, June 11–14, Québec, Canada
Available from: 2017-06-14 Created: 2017-11-21 Last updated: 2018-08-17Bibliographically approved
Chistiakova, T., Mattsson, P., Carlsson, B. & Wigren, T. (2017). Nonlinear system identification of the dissolved oxygen to effluent ammonia dynamics in an activated sludge process. Paper presented at IFAC 2017, 20th World Congress of the International-Federation-of-Automatic-Control, July 9–14, Toulouse, France. IFAC-PapersOnLine, 50(1), 3917-3922
Open this publication in new window or tab >>Nonlinear system identification of the dissolved oxygen to effluent ammonia dynamics in an activated sludge process
2017 (English)In: IFAC-PapersOnLine, ISSN 1045-0823, E-ISSN 1797-318X, Vol. 50, no 1, p. 3917-3922Article in journal (Refereed) Published
Abstract [en]

Aeration of biological reactors in wastewater treatment plants is important to obtain a high removal of soluble organic matter as well as for nitrification but requires a significant use of energy. It is hence of importance to control the aeration rate, for example, by ammonium feedback control. The goal of this paper is to model the dynamics from the set point of an existing dissolved oxygen controller to effluent ammonia using two types of system identification methods for a Hammerstein model, including a newly developed recursive variant. The models are estimated and evaluated using noise corrupted data from a complex mechanistic model (Activated Sludge Model no.1). The performance of the estimated nonlinear models are compared with an estimated linear model and it is shown that the nonlinear models give a significantly better fit to the data. The resulting models may be used for adaptive control (using the recursive Hammerstein variant), gain-scheduling control, L2 stability analysis, and model based fault detection.

Keywords
System identification, Output error model, Hammerstein model, Wastewater treatment, BSM1
National Category
Control Engineering Water Treatment
Identifiers
urn:nbn:se:uu:diva-334208 (URN)10.1016/j.ifacol.2017.08.365 (DOI)000423964800149 ()
Conference
IFAC 2017, 20th World Congress of the International-Federation-of-Automatic-Control, July 9–14, Toulouse, France
Available from: 2017-10-18 Created: 2017-11-21 Last updated: 2018-08-17Bibliographically approved
Yasini, S. & Wigren, T. (2017). Parametric convergence analysis of an adaptive filtering algorithm with output quantization.
Open this publication in new window or tab >>Parametric convergence analysis of an adaptive filtering algorithm with output quantization
2017 (English)Report (Other academic)
Series
Technical report / Department of Information Technology, Uppsala University, ISSN 1404-3203 ; 2017-011
National Category
Control Engineering
Identifiers
urn:nbn:se:uu:diva-334224 (URN)
Available from: 2017-06-08 Created: 2017-11-21 Last updated: 2018-08-17Bibliographically approved
Organisations
Identifiers
ORCID iD: ORCID iD iconorcid.org/0000-0003-2580-8906

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