dc.contributor.author | Khalili, Mohammad | |
dc.contributor.author | Lie, Bernt | |
dc.date.accessioned | 2019-02-06T12:18:18Z | |
dc.date.available | 2019-02-06T12:18:18Z | |
dc.date.created | 2019-02-05T10:00:00Z | |
dc.date.issued | 2018 | |
dc.identifier.citation | Linköping Electronic Conference Proceedings. 2018, (153), 185-192. | nb_NO |
dc.identifier.issn | 1650-3686 | |
dc.identifier.uri | http://hdl.handle.net/11250/2584140 | |
dc.description.abstract | Many industrially important reactors are operated over a regime where they exhibit nonlinear behavior. Exothermal reactors are often open-loop unstable. For such reactors, safe operation with good performance requires good control. We have considered linear controllers and tested these on a simple chemical engineering non-linear, open loop unstable model and an extension of the model in order to do a basic test of model uncertainty. Specifically, a PI controller has been tuned and tested, the operation of an Extended Kalman Filter (EKF, KF) has been tuned and tested. Based on feedback from estimated states in the EKF, a linear quadratic controller with integral action (LQG+I) has been tuned and tested; the study has been carried out using MATLAB for KF and LQG+I tuning; the remaining study has been carried out in a Jupyter Notebook using Python in tandem with Modelica. The PI controller lead to negative cooling water temperature upon a step change in temperature reference. When constraining the input to liquid water with anti-windup, PI control gives considerable undesirable overshoot in the reactor temperature. The LQG+I controller performs much better wrt. temperature overshoot. Overall, the reported work has demonstrated how a modern simulation set-up (OpenModelica + Python) can be used for model based control analysis and design. | nb_NO |
dc.description.abstract | Comparison of Linear Controllers for Nonlinear, Open-loop Unstable Reactor | nb_NO |
dc.language.iso | eng | nb_NO |
dc.rights | Navngivelse-Ikkekommersiell 4.0 Internasjonal | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc/4.0/deed.no | * |
dc.title | Comparison of Linear Controllers for Nonlinear, Open-loop Unstable Reactor | nb_NO |
dc.type | Journal article | nb_NO |
dc.type | Peer reviewed | nb_NO |
dc.description.version | publishedVersion | nb_NO |
dc.source.pagenumber | 185-192 | nb_NO |
dc.source.journal | Linköping Electronic Conference Proceedings | nb_NO |
dc.source.issue | 153 | nb_NO |
dc.identifier.doi | 10.3384/ecp18153185 | |
dc.identifier.cristin | 1673404 | |
cristin.unitcode | 222,58,2,0 | |
cristin.unitname | Institutt for elektro, IT og kybernetikk | |
cristin.ispublished | true | |
cristin.fulltext | original | |
cristin.qualitycode | 1 | |