Experimental modeling and robust controller design for the transient loading of a marine diesel engine

Gkerekos, Christos; Γκερέκος, Χρήστος

dc.contributor.author	Gkerekos, Christos	en
dc.contributor.author	Γκερέκος, Χρήστος	el
dc.date.accessioned	2016-04-08T12:20:47Z
dc.date.available	2016-04-08T12:20:47Z
dc.date.issued	2016-04-08
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/42352
dc.identifier.uri	http://dx.doi.org/10.26240/heal.ntua.11877
dc.rights	Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ελλάδα	*
dc.rights.uri	http://creativecommons.org/licenses/by-nc-nd/3.0/gr/	*
dc.subject	Συστήματα αυτόματου ελέγχου	el
dc.subject	Πειραματική μοντελοποίηση	el
dc.subject	Εύρωστος έλεγχος	el
dc.subject	Control systems	en
dc.subject	Experimental modeling	en
dc.subject	Robust control	en
dc.subject	Water brake	en
dc.subject	Πέδη νερού	el
dc.subject	Αναγνώριση συστήματος	el
dc.subject	System ιdentification	en
dc.title	Experimental modeling and robust controller design for the transient loading of a marine diesel engine	en
dc.title	Πειραματική μοντελοποίηση και σχεδιασμός εύρωστου ελεγκτή για τη μεταβατική φόρτιση ναυτικού κινητήρα πετρελαίου	el
heal.type	bachelorThesis
heal.classification	Control systems	en
heal.classification	System identification	el
heal.classificationURI	http://skos.um.es/unesco6/120702
heal.classificationURI	http://id.loc.gov/authorities/subjects/sh85131740
heal.language	en
heal.access	free
heal.recordProvider	ntua	el
heal.publicationDate	2015-07-15
heal.abstract	In this work, the robust control of the output valve of a water brake is investigated for the transient loading of a marine diesel engine. Experimental models of the water brake - engine array are derived, corresponding to different operating points. Those models are processed in order to derive an uncertain model that characterizes the system in a wide range of operating points. A μ-synthesis controller is developed, based on the uncertain model derived. The controller is tested on a water brake coupled with a marine diesel engine at LME/NTUA in order to evaluate the controller performance and the software simulation results. Initially, datasets were obtained by providing the open-loop system with an appropriate Pseudo-Random Binary Signal (PRBS) signal. Datasets were then pre-processed and split for identification and validation use. Multiple models were derived using both subspace (Numerical algorithm for Subspace State Space System IDentification (N4SID)) and polynomial (Prediction Error Method (PEM)) algorithms. Those models were evaluated against a validation dataset and the models providing the best fit were selected. Then, depending on the operating point that each model was based on, models were separated into two pools: “average” and “extreme”. The “average” model pool was used to select nominal models and the “extreme” model pool was used as a representation of worst-case scenarios. By combining these pools appropriately, uncertain models were derived. Given the complexity of the system examined and the presence of non-linearities, all controllers developed were 2-Degrees-of-Freedom (DOF) μ-synthesis controllers. Different controllers were derived based on different uncertain models. Consequently, different stability and performance properties were observed. A software simulation setup was developed in order to evaluate the controllers against the models derived. By testing a controller against a model from the “extreme” pool, its robustness was evaluated. Finally, the controllers that showed the most merit during software simulation, were evaluated at the experimental testbed of LME. The controllers functioned satisfactorily and the software simulation results approached those obtained experimentally, proving the soundness of the modeling.	en
heal.abstract	Στη διπλωματική αυτή διερευνήθηκε ο εύρωστος έλεγχος της βαλβίδας εξόδου μιας πέδης νερού για τη μεταβατική φόρτιση ναυτικού κινητήρα πετρελαίου. Αναπτύχθηκαν πειραματικά μοντέλα της διάταξης πέδη - κινητήρας σε διαφορετικά σημεία λειτουργίας και βάσει αυτών αναπτύχθηκε ένα μοντέλο με αβεβαιότητα το οποίο περιγράφει τη συμπεριφορά του συστήματος σε ένα μεγάλο εύρος σημείων λειτουργίας. Βασιζόμενος στο μοντέλο με αβεβαιότητα, αναπτύχθηκε κατάλληλος ελεγκτής μ δύο βαθμών ελευθερίας για τον έλεγχο της βαλβίδας εξόδου. Ο ελεγκτής και η μοντελοποίηση αξιολογήθηκαν πειραματικά στη κλίνη δοκιμών του ΕΝΜ/ΕΜΠ.	el
heal.advisorName	Παπαλάμπρου, Γεώργιος	el
heal.committeeMemberName	Κυριακόπουλος, Κωνσταντίνος	el
heal.committeeMemberName	Κυρτάτος, Νικόλαος	el
heal.academicPublisher	Εθνικό Μετσόβιο Πολυτεχνείο. Σχολή Ναυπηγών Μηχανολόγων Μηχανικών. Τομέας Ναυτικής Μηχανολογίας. Εργαστήριο Ναυτικής Μηχανολογίας	el
heal.academicPublisherID	ntua
heal.numberOfPages	150 σ.
heal.fullTextAvailability	true