Daniel Görges

This thesis addresses optimal control of discrete-time switched linear systems with application to networked embedded control systems (NECSs). Part I focuses on optimal control and scheduling of discrete-time switched linear systems. The objective is to simultaneously design a control law and a switching (scheduling) law such that a cost function is minimized. This optimization problem exhibits exponential complexity. Taming the complexity is a major challenge. Two novel methods are presented to approach this optimization problem: Receding-horizon control and scheduling relies on the receding horizon principle. The optimization problem is solved based on relaxed dynamic programming, allowing to reduce complexity by relaxing optimality within predefined bounds. The solution can be expressed as a piecewise linear (PWL) state feedback control law. Stability is addressed via an a priori stability condition based on a terminal weighting matrix and several a posteriori stability criteria based on constructing piecewise quadratic Lyapunov functions and on utilizing the cost function as a candidate Lyapunov function. Moreover, a region-reachability criterion is derived. Periodic control and scheduling relies on periodic control theory. Both offline and online scheduling are studied. The optimization problem is solved based on periodic control and exhaustive search. The online scheduling solution can again be expressed as a PWL state feedback control law. Stability is guaranteed inherently. Several methods are proposed to reduce the online complexity based on relaxation and heuristics. Part II focuses on optimal control and scheduling of NECSs. The NECS is modeled as a block-diagonal discrete-time switched linear system. Various control and scheduling codesign strategies are derived based on the methods from Part I regarding the structural properties of NECSs. The methods presented in Part I and II are finally evaluated in a case study.

Optimal Control of Switched Systems with Application to Networked Embedded Control Systems

Bernd Sauer

Ralf Kalmar

Patrick Fleischmann

Martin Thul

Karsten Berns

Nicole Stephan

Roman Teutsch

Klaus Dressler

Die Beiträge der Commercial Vehicle Technology 2018 sind eine Sammlung von Publikationen für das 5. CVT Symposium der TU Kaiserslautern. Wie in den Jahren zuvor, 2010, 2012, 2014 und 2016 wurden zahlreiche Beiträge zu aktuellen Entwicklungen im Nutzfahrzeugbereich zu einer interessanten und informativen Sammlung zusammengestellt. Die Beiträge sind für Maschinenbauer, Elektrotechniker und Informatiker aus Industrie und Wissenschaft von Interesse und zeigen den aktuellen Stand der Technik auf diesem Gebiet. Die Inhalte der Publikationen umfassen die Themen unterstütztes und automatisiertes Fahren und Arbeiten, Energie- und Ressourceneffizienz, innovative Entwicklung und Fertigung, Sicherheit, Zuverlässigkeit und Langlebigkeit sowie Systemsimulation. Die Konferenz findet vom 13. bis 15. März 2018 an der Technischen Universität Kaiserslautern statt und erwartet den Besuch vieler renommierter Wissenschaftler und Vertreter der Industrie. The proceedings of Commercial Vehicle Technology 2018 are a collection of publications for the 5th CVT Symposium at the University of Kaiserslautern. As in the previous years 2010, 2012, 2014 and 2016 numerous submissions focusing on current developments in the field of commercial vehicles have been composed into an interesting and informative collection. The contributions are of interest for mechanical engineers, electrical engineers and computer scientists working in industry and academia and show the current state-of-the-art in this field. The contents of the publications span the topics assisted and automated driving and working, energy and resource efficiency, innovative development and manufacturing, safety, reliability and durability as well as system simulation. The conference is held on March 13 to 15, 2018 at the Technische Universität Kaiserslautern and is expecting the attendance of many renowned scientists and representatives of industry.

Proceedings of the 5th Commercial Vehicle Technology Symposium - CVT 2018

Commercial Vehicle Technology 2018

Daniel Görges

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