This dissertation is about periodic event-based control, and has a twofold purpose. From a methodological viewpoint, the possibilities offered by having the sensor transmit past values of the controlled variable in addition to the one that triggered the event, are explored, and the consequent stability analysis is formalized. From the technological and implementation-related point of view, a Modelica library is presented to experiment with the theoretical ideas just sketched. The library comprehends several controller structures and event triggering techniques, with or without past samples transmission, and structures the represented control blocks so as to separate sensor, event generators and controllers, for maximum flexibility. The presented ideas look promising, and future work will be devoted to further investigate the stability of event-based control loops encompassing past samples transmission. Also, there is much room to expand the library by adding new models for the different event-based components.
Questo lavoro riguarda il controllo ebent-based periodico e ha un duplice scopo. Da un punto di vista metodologico, vengono esplorate le possibilità offerte dal fatto che il sensore trasmetta valori passati della variabile controllata in aggiunta a quello che ha innescato l'evento, e la conseguente analisi di stabilità viene formalizzata. Dal punto di vista tecnologico e di implementazione, viene presentata una libreria Modelica per sperimentare le idee teoriche descritte sopra. La libreria comprende diverse strutture di controllori e diverse tecniche per la generazione di eventi, con o senza la trasmissione di campioni passati; inoltre, la libreria struttura i blocchi di controllo rappresentati in modo da separare sensori, generatori di eventi e controlori, per ottenere la massima flessibilità. Le idee presentate sembrano promettenti e in futuro la ricerca si concentrerà su ulteriori indagini a proposito della stabilità dei loop di controllo event-based (sempre di tipo periodco) comrpendenti la trasmissione dei campioni passati. Inoltre, c'è molto spazio per espandere la libreria aggiungendo nuovi modelli per i diversi componenti di un loop event-based.
Multi-sample transmission in EB control
AL MAWAJDEH, YUSEF
2016/2017
Abstract
This dissertation is about periodic event-based control, and has a twofold purpose. From a methodological viewpoint, the possibilities offered by having the sensor transmit past values of the controlled variable in addition to the one that triggered the event, are explored, and the consequent stability analysis is formalized. From the technological and implementation-related point of view, a Modelica library is presented to experiment with the theoretical ideas just sketched. The library comprehends several controller structures and event triggering techniques, with or without past samples transmission, and structures the represented control blocks so as to separate sensor, event generators and controllers, for maximum flexibility. The presented ideas look promising, and future work will be devoted to further investigate the stability of event-based control loops encompassing past samples transmission. Also, there is much room to expand the library by adding new models for the different event-based components.File | Dimensione | Formato | |
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2018_04_AL Mawajdeh.pdf
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https://hdl.handle.net/10589/140041