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Investigation on Robust Codesign Methods for Networked Control Systems
The problem of jointly designing a robust controller and an intelligent scheduler for networked control systems (NCSs) is addressed in this thesis. NCSs composing of multiple plants that share a single channel communication network with uncertain time-varying transmission times are modeled as switched polytopic systems with additive norm-bounded uncertainty. Switching is deployed to represent scheduling, the polytopic uncertainty to overapproximatively describe the uncertain time-varying transmission times. Based on the resulting NCS model and a state feedback control law, the control and scheduling codesign problem is then introduced and formulated as a robust (minimax) optimization problem...
Optimal Control of Switched Systems with Application to Networked Embedded Control Systems
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...
Modelling and Control of an Autonomous Two-Wheeled Vehicle
With respect to the future urban mobility, modern electrical bicycles, advanced motorcycles and innovative two-wheeled vehicles are arresting enormous amount of attention. Especially, model-based control and optimal trajectory planning for such vehicles are important to the research and development of the future. Therefore, a reliable and yet usable vehicle model as well as a systematic approach to motion control for two-wheeled vehicles are essential, to which this work makes a contribution. Currently available two-wheeled vehicle models are mostly either too complex to be used for a systematic control synthesis, or too simple such that the physical behaviour of the vehicle is no more repre...
A Hybrid Physical and Data-drivApproach to Motion Prediction and Control in Human-Robot Collaboration
In recent years, researchers have achieved great success in guaranteeing safety in human-robot interaction, yielding a new generation of robots that can work with humans in close proximity, known as collaborative robots (cobots). However, due to the lack of ability to understand and coordinate with their human partners, the ``co'' in most cobots still refers to ``coexistence'' rather than ``collaboration''. This thesis aims to develop an adaptive learning and control framework with a novel physical and data-driven approach towards a real collaborative robot. The first part focuses on online human motion prediction. A comprehensive study on various motion prediction techniques is presented, i...
Distributed Optimisation for Multi-Robot Cooperative Manipulation Control in Dynamic Environments
Since the manipulation tasks for robotic systems become more and more complicated, multi-robot cooperation has been attracting much attention recently. Furthermore, under the trend of human-robot co-existence, collision-free motion control is now also desired on multi-robot groups. This dissertation aims to design a novel distributed optimal control framework to deal with multi-robot cooperative manipulation of rigid objects in dynamic environments. Besides object transportation, the control scheme also tackles obstacle avoidance, joint-space performance optimisation and internal force suppression. The proposed control framework has a two-layer structure, with a distributed optimisation algo...
Handbook of Research on Emerging Designs and Applications for Microwave and Millimeter Wave Circuits
Microwave and millimeter-wave (mm-wave) circuits and systems have been widely employed in various emerging technologies such as 5G and beyond wireless mobile communication systems, autonomous driving, electronic warfare, and radar systems. To better understand the benefits, challenges, and opportunities of this technology, further study is required. The Handbook of Research on Emerging Designs and Applications for Microwave and Millimeter Wave Circuits describes the latest advances in microwave and mm-wave applications and provides state-of-the-art research in the domain of microwave, mm-wave, and THz devices and systems. Covering key topics such as antennas, circuits, propagation, and energy harvesting, this major reference work is ideal for computer scientists, industry professionals, researchers, academicians, practitioners, scholars, instructors, and students.
Practical Stability of Nonlinear Systems
This is the first book that deals with practical stability and its development. It presents a systematic study of the theory of practical stability in terms of two different measures and arbitrary sets and demonstrates the manifestations of general Lyapunov's method by showing how this effective technique can be adapted to investigate various apparently diverse nonlinear problems including control systems and multivalued differential equations.
Beitrag zu iterativ lernenden modellprädiktiven Regelungen
In der Industrie laufen viele Prozesse zyklisch und damit wiederholend ab. Eine hohe Regelgüte ist hierbei unabdingbar. Daher kommen iterativ lernende Regelungsmethoden zum Einsatz, welche die Regelung des Prozesses zyklisch verbessern. In dieser Dissertation werden iterativ lernende modellprädiktive Regelungsverfahren vorgestellt. Die entwickelten Methoden ermöglichen durch ihre modellbasierte Struktur eine zyklische Steigerung der Regelgüte bei gleichzeitiger Berücksichtigung der Systembeschränkungen. Zyklische unbekannte Störungen und Dynamiken lassen sich hiermit iterativ erlernen und unterdrücken. Eine Robustifizierung der Verfahren gegenüber Messrauschen sowie Unsicherheiten w...
MhGAP Humanitarian Intervention Guide (mhGAP-HIG)
The mhGAP Intervention Guide (IG) is a clinical guide on mental neurological and substance use disorders for general health care workers who work in non-specialized health care settings particularly in low- and middle-income countries. These health care workers include general physicians family physicians nurses and clinical officers. The mhGAP programme provides a range of tools to support the work of health care providers as well as health policy makers and planners The proposed guide is an adaptation of the mhGAP Intervention Guide to be used in humanitarian settings. These settings include a broad range of acute and chronic emergency situations arising from armed conflicts natural disasters and industrial disasters and may include mass displacement of populations (eg refugees and/or internally displaced people).
