Searched for: subject%3A%22Network%255C+controllability%22
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de Albuquerque Gleizer, G. (author), Mazo, M. (author)
We provide a method to construct finite abstractions exactly bisimilar to linear systems under a modified periodic event-triggered control (PETC), when considering as output the inter-event times they generate. Assuming that the initial state lies on a known compact set, these finite-state models can exactly predict all sequences of sampling...
journal article 2020
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Mooren, Maurits (author)
With the increasing amount of information sent in control systems, data is more often communicated through a communication network. These networked control systems use the network to exchange control and feedback signals among the system’s components. Data sent over a network attracts adversaries that try to read and modify this data. These...
master thesis 2019
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Szymanek, Aleksandra (author)
With the recent development of control systems, event-triggered control (ETC) has been introduced to prevent unnecessary usage of resources, which often happens under time-based control implementations. This thesis presents a novel approach to periodic event-triggered control (PETC) that aims at reducing the number of transmissions between the...
master thesis 2019
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Schalkwijk, Paul (author)
As the use of Networked Control Systems increases, the need for control methods with more efficient network usage also grows. These methods require a more sophisticated way of pre- dicting their traffic, and an approach for this is using a formal modelling approach using Timed Automata. Timed Automata have been used for over 25 years for several...
master thesis 2019
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Szymanek, Aleksandra (author), de Albuquerque Gleizer, G. (author), Mazo, M. (author)
In networked control systems (NCSs), extensive data exchange between plants and controllers leads to an unnecessary usage of communication and computational resources. Aperiodic sample-and-hold methods such as event-triggered control (ETC) can reduce the number of transmissions, allowing more applications to operate within the same network....
conference paper 2019
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Gama, F. (author), Isufi, E. (author), Ribeiro, Alejandro (author), Leus, G.J.T. (author)
Controllability of complex networks arises in many technological problems involving social, financial, road, communication, and smart grid networks. In many practical situations, the underlying topology might change randomly with time, due to link failures such as changing friendships, road blocks or sensor malfunctions. Thus, it leads to...
journal article 2019
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Giordano, G. (author), Segata, Michele (author), Blanchini, Franco (author), Lo Cigno, Renato (author)
Vehicular networks supporting cooperative driving are among the most interesting and challenging ad-hoc networks. Platooning, or the act of coordinating a set of vehicles through an ad-hoc network, promises to improve traffic safety, and at the same time reduce congestion and pollution. The design of the control system for this application is...
journal article 2019
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van de Weg, Goof Sterk (author), Vu, Hai L. (author), Hegyi, A. (author), Hoogendoorn, S.P. (author)
In this paper, we develop a hierarchical approach to optimize the signal timings in an urban traffic network taking into account the different dynamics in all traffic regimes. The proposed hierarchical control framework consists of two layers. The first layer--the network coordination layer--uses a model predictive control strategy based on a...
journal article 2018
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Fu, A. (author), Mazo, M. (author)
Asynchronous decentralized event-triggered control (ADETC) Mazo Jr. and Cao (2014) is an implementation of controllers characterized by decentralized event generation, asynchronous sampling updates, and dynamic quantization. Combining those elements in ADETC results in a parsimonious transmission of information which makes it suitable for...
journal article 2018
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de Albuquerque Gleizer, G. (author), Mazo, M. (author)
In this work we propose a Self-Triggered Control (STC) strategy for linear time-invariant (LTI) systems subject to bounded disturbances, using LTI discrete-time dynamic output-feedback. The STC logic computes worst-case triggering times from available information, based on a Periodic Event Triggered Control (PETC) triggering function. In the...
journal article 2018
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Hop, Christiaan (author)
The number of electronic control systems applied in vehicles has increased dramatically over<br/>the years. This trend will only continue with the introduction of novel technologies such as<br/>advanced driver assistance systems (ADAS). To save cable weight and costs in-vehicle control<br/>systems often use shared communication networks. With...
master thesis 2017
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Bregman, Sander (author)
In this thesis, a control design problem, in which communication between different elements of the control system takes place through a shared (possibly wireless) channel, is considered. With the implementation of the proposed approach, the use of limited resources such as network bandwidth and battery life may be reduced.<br/><br/>The proposal...
master thesis 2017
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Moustakis, Nikolaos (author)
Major advancements over the last few decades in communication networks gave rise to the<br/>new paradigm of Networked Control Systems (NCSs). Within this paradigm, sensing and<br/>actuation signals are exchanged among various parts of a single system or among many<br/>subsystems via communication networks. Although this enables one to perform...
master thesis 2017
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Herdeiro Teixeira, A.M. (author), Araujo, Jose (author), Sandberg, Henrik (author), Johansson, Karl H. (author)
In this paper, we address the problem of distributed reconfiguration of networked control systems upon the removal of misbehaving sensors and actuators. In particular, we consider systems with redundant sensors and actuators cooperating to recover from faults. Reconfiguration is performed while minimizing a steady-state estimation error...
journal article 2017
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Boem, Francesca (author), Ferrari, Riccardo M.G. (author), Keliris, Christodoulos (author), Parisini, Thomas (author), Polycarpou, Marios M. (author)
Networked systems present some key new challenges in the development of fault-diagnosis architectures. This paper proposes a novel distributed networked fault detection methodology for large-scale interconnected systems. The proposed formulation incorporates a synchronization methodology with a filtering approach in order to reduce the effect...
journal article 2017
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Abou Harfouch, Youssef (author), Yuan, S. (author), Baldi, S. (author)
The advances in distributed inter-vehicle communication networks have stimulated a fruitful line of research in Cooperative Adaptive Cruise Control (CACC). In CACC, individual vehicles, grouped into platoons, must automatically adjust their own speed using on-board sensors and communication with the preceding vehicle so as to maintain a safe...
journal article 2017
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Kartakis, Sokratis (author), Fu, A. (author), Mazo, M. (author), McCann, Julie A. (author)
Energy constraint long-range wireless sensor/actuator-based solutions are theoretically the perfect choice to support the next generation of city-scale cyber-physical systems. Traditional systems adopt periodic control which increases network congestion and actuations while burdens the energy consumption. Recent control theory studies...
journal article 2017
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Sharifi Kolarijani, A. (author)
In networked systems, particularly over wireless or shared channels, the scarcity of communication resources makes the application of traditional control strategies with periodic sampling problematic. Alternative approaches with aperiodic sampling, such as: event triggered control and self triggered control, have been recently proposed to reduce...
master thesis 2014
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Dahlan, B. (author)
This thesis presents a method to semi-automate the reasoning about network bounds, namely the backlog and delay. Network Calculus offers a rich theory for modeling network elements. Using the modeling techniques of network calculus, network elements are represented by discrete-time systems whose dynamics are linear in min-plus algebra. From the...
master thesis 2013
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Lin, S. (author)
Model Predictive Control is applied to control and coordinate large-scale urban traffic networks. However, due to the large scale or the nonlinear, non-convex nature of the on-line optimization problems solved, the MPC controllers become real-time infeasible in practice, even though the problem is solvable in theory. In this thesis, we mainly...
doctoral thesis 2011
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