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| Authors: | Pål Kittilsen: Cybernetica AS, 7038 Trondheim/Statoil Research Centre, Trondheim, Norway |
| | Svein Olav Hauger: Cybernetica AS, 7038 Trondheim, Norway |
| | Stein O. Wasbø: Cybernetica AS, 7038 Trondheim, Norway |
| Publication title: | Designing models for online use with Modelica and FMI |
| Conference: | Proceedings of the 9th International MODELICA Conference, September 3-5, 2012, Munich, Germany |
| Publication type: | Abstract and Fulltext |
| Issue: | 076 |
| Article No.: | 019 |
| Abstract: | Model-based online applications such as soft-sensing, fault detection or model predictive control require representative models. Basing models on physics has the advantage of naturally describing nonlinear processes and potentially describing a wide range of operating conditions. Implementing adaptivity is essential for online use to avoid model performance degradation over time and to compensate for model imperfection. Requirements for identifiability and observability, numerical robustness and computational speed place an upper limit on model complexity. These considerations motivate that models for online use should be balanced-complexity, physically based with online adaption possible.
Despite potential benefits, the effort required to implement balanced-complexity models, particularly at large scales, may deter their use. This paper presents techniques used in the design of balanced-complexity models. A Modelica-based approach is chosen to reduce implementation effort by interfacing exported Modelica models with application code by means of the generic interface FMI. The suggested approach is demonstrated by parameter estimation for a process of offshore oil production: a subsea well-manifold-pipeline production system. |
| Language: | English |
| Keywords: | Modeling, process control, process models, process simulators, offshore oil and gas production, Modelica, subsea production, multiphase flow, balanced-complexity models, nonlinear model-predictive control, FMI |
| Year: | 2012 |
| No. of pages: | 8 |
| Pages: | 197-204 |
| ISBN: | 978-91-7519-826-2 |
| Series: | Linköping Electronic Conference Proceedings |
| ISSN (print): | 1650-3686 |
| ISSN (online): | 1650-3740 |
| File: | http://www.ep.liu.se/ecp/076/019/ecp12076019.pdf |
| Available: | 2012-11-19 |
| Publisher: | Linköping University Electronic Press, Linköpings universitet |
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REFERENCE TO THIS PAGE | Pål Kittilsen, Svein Olav Hauger, Stein O. Wasbø (2012). Designing models for online use with Modelica and FMI, Proceedings of the 9th International MODELICA Conference, September 3-5, 2012, Munich, Germany http://dx.doi.org/10.3384/ecp12076197 (accessed 5/23/2013) |
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Ph.D., Lic. Theses
