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This thesis explores the persistence of embedded eigenvalues of asymptotically periodic Schrödinger-type operators under perturbations on domains with only one unbounded direction. Embedded eigenvalues present unique challenges, as they lie within the continuous spectrum, making their stability under perturbations a nontrivial problem.The aim of the first part of the thesis is to provide a general
This paper presents a solution to the saturation problem in cascade control schemes. When cascade control approaches work in linear mode without saturation influence, important improvements can be achieved in industrial control loops. The effect of disturbances and/or nonlinear actuator behaviours on the main process variables can be considerably reduced. However, when saturation arises in the inn
Distributed camera surveillance systems typically consist of multiple cameras that need to store some fraction of their video streams in a central storage node. The disk space of this node as well as the network between the cameras and this central node constitute shared resources. In the paper the disk space allocation as well as the network bandwidth reservation are solved using techniques norma
Popular Abstract in Swedish Avhandlingen Optimization of Low-Level Controllers and High-Level Polymer Grade Changes är inom ämnesområdet reglerteknik. Det centrala i ämnet reglerteknik är att styra ett system, såsom en motor, ett teleskop eller en kemisk reaktor, så att det uppför sig på ett önskvärt sätt. Detta görs genom att använda mätningar av systemet, en algoritm som beräknar hur systemet s
Virtually all real life systems are such that they present some kind of limitation on one or many of its variables, physical quantities. These systems are designated in this thesis as systems with limited capacity. This work is treating control related problems of a subclass of such systems, where the limitation is a critical factor. The thesis is composed of four parts. The first part is treatin
This paper presents a practical comparison for some of the most relevant tuning rules for feedforward compensators that have been published in the recent years. The work is focused on the rejection of disturbances that affect the process output. The different tuning rules are evaluated in simulation and several performance indices are calculated in order to provide a quantitative comparison. All t
