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IEEE Energy Conversion Congress and Exposition, ECCE

作者： Jun Cai Qing-Chang Zhong Dept. Automatic Control and Systems Engineering The University of Sheffield Sheffield UK

In this paper, an asymmetrical ΓZ-source hybrid power converter is proposed for fuel cell-battery hybrid vehicle application. The converter uses an asymmetrical ΓZ-source converter to interface the fuel cell and a bidirectional DC-DC converter to interface the battery. Via the DC-DC converter, the capacitor voltage of the asymmetrical ΓZ-source converter can be controlled into a constant value. By adjusting the modulation index of the inverter, the fuel cell voltage can be controlled into the reference value, which can ensure high operation efficiency in the fuel cell. To reduce the number of semiconductor switching in the shoot through states, the space vector pulse-width modulation (SVPWM) control method is implemented for achieve the maximum constant boost control for the asymmetrical ΓZ-source inverter. To verify the validity of the proposed power converter topology and the control methods, the real-time simulation model is performed in Opal-RT Real Time Digital Simulator. The simulation results demonstrated the feasibility of the proposed methods.

关键词： Fuel cells Inverters Batteries Vectors DC-DC power converters Switches

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MATLAB tools for the analysis of Petri net models

MATLAB tools for the analysis of Petri net models

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International Conference on Emerging Technologies and Factory Automation (ETFA)

作者： Jorge Júlvez Mihaela H. Matcovschi Octavian Pastravanu Dept. of Computer Science and Systems Engineering Univ. of Zaragoza Spain Dept. of Automatic Control and Applied Informatics Technical University “Gh. Asachi” of Iasi Romania

The paradigm of Petri nets offers a rich modeling power that has been successfully exploited in many different application domains as manufacturing, logistic, traffic, computer and biological domains. In order to develop and analyze Petri models in an efficient and systematic way, appropriate software tools are required. Among the existing software platforms for scientific software development, MATLAB places at the user's disposal a large set of toolboxes with an inutitive graphical interface. This paper describes some of the existing Petri net toolboxes that have been developed on MATLAB, and that cover the needs for the modeling and analysis of discrete, continuous and hybrid systems.

关键词： Computational modeling Semantics Servers Petri nets MATLAB Analytical models

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A Droop controller Achieving Proportional Power Sharing without Output Voltage Amplitude or Frequency Deviation

A Droop Controller Achieving Proportional Power Sharing with...

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IEEE Energy Conversion Congress and Exposition

作者： Yu Zeng Qing-Chang Zhong Dept. of Automatic Control and Systems Engineering The University of Sheffield Sheffield United Kingdom

ISBN: (纸本)9781479957774

The droop controller is widely used for the parallel operation of inverters. However, the conventional droop controller has a trade-off between the power sharing and the regulations of the output voltage amplitude and frequency. In order to remove this trade-off, a new droop controller is presented in this paper. This method adopts the structure of the robust droop controller and utilizes the transient droop characteristic, which enables proportional power sharing without output voltage amplitude or frequency deviation. Simulation results are provided to demonstrate the feasibility and excellent performance of the proposed controller.

关键词： Inverters Impedance Voltage control Robustness Reactive power Frequency control Transient analysis

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Real time agent based simulation for smart city emergency protocols

Real time agent based simulation for smart city emergency pr...

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International Conference on System Theory, control, and Computing (ICSTCC)

作者： Monica Dragoicea Monica Patrascu George Alexandru Serea Automatic Control and Systems Engineering Dept. University Politehnica of Bucharest Bucharest Romania

This work proposes a holistic perspective on a coordination strategy for an Intelligent Operation Centre (IOC) at city level that accounts for the implementation of critical intervention protocols. The proposed solution depicts an agent based simulation scenario, demonstrating the real-time integration of large amounts of data into a decision making process. Based on this type of analysis, leaders have the possibility to analyze data for better decisions, anticipate problems to resolve them proactively and coordinate resources to operate effectively. The proposed agent-based coordination solution is validated through an Agent-Based oriented simulation (ABS) of specific behavioural scenarios. These scenarios account for emergency response in case of city wide critical situations in a larger perspective of a scalable multi-agent system whose main task is human life protection.

关键词： Cities and towns Protocols Emergency services Buildings Computer architecture Airports

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Emergent intelligence in agents: A scalable architecture for smart cities

Emergent intelligence in agents: A scalable architecture for...

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International Conference on System Theory, control, and Computing (ICSTCC)

作者： Monica Patrascu Monica Dragoicea Andreea Ion Automatic Control and Systems Engineering Dept. University Politehnica of Bucharest Bucharest Romania

The Smart City concept is the context in which a scalable agent architecture with emergent properties is introduced in this paper. These agents form on-demand control loops within the urban system, taking into account both the protection and the comfort of its inhabitants, at varying degrees of intelligence and abstraction of tasks and/or purpose. The resulting flexibility and scalability of the system allows expansion and contraction of the systemic environments, integration with emergency response units, protection of human lives, as well as day to day regular operations. The case study included in this paper illustrates the real-time creation of a control loop for an underground railway intersection system. The objective of forming the traffic light and rail switch control loops is first formulated, followed by the message exchange between devices in order to perform the reorganization of the system, in an agent based simulation scenario.

关键词： Computer architecture Microprocessors control systems Performance evaluation Cities and towns Rail transportation Collaboration

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On the design of Multiple Kernels for nonparametric linear system identification

On the design of Multiple Kernels for nonparametric linear s...

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IEEE Annual Conference on Decision and control

作者： A. Chiuso T. Chen L. Ljung G. Pillonetto Dept. of Information Engineering University of Padova Division of Automatic Control Linkoping University

ISBN: (纸本)9781467360890

It has been recently shown that regularization methods for system identification have, under certain circumstances, advantages over classical parametric methods. This advantage is mainly due to the fact that the regularization term, which have a well known Bayesian interpretation, is an effective and flexible mean to control model complexity. In this paper we take a principled approach to the design of kernels and, using a well known decomposition of the so called "stable spline" kernel, we show that it provides a natural description for impulse responses of linear systems. Motivated by this decomposition we introduce a new family of multiple kernels which yields a remarkable improvement over state-of-the-art kernels when it comes to modeling resonant systems.

关键词： Kernel Splines (mathematics) Bridges Linear systems Mathematical model Optimization Bayes methods

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A self-organizing map based solution to the automatic detection of meteor echoes in radio recordings

A self-organizing map based solution to the automatic detect...

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International Conference on Electronics, Computers and Artificial Intelligence (ECAI)

作者： Victor Ştefan Roman Cătălin Buiu Dept. of Automatic Control and Systems Engineering Politehnica University of Bucharest Bucharest Romania

A novel automatic meteor detection approach, using a self-organizing map type of artificial neural network is presented in this paper. The proposed solution aims at analyzing a given dataset and extracting the meteor signals present in it. For this, a self-organizing map is trained using radio recordings. This neural network will then be used on a test dataset to check the performances of the proposed approach.

关键词： Neurons Training Artificial neural networks Visualization Spectrogram Organizing

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Author's retrospective for: Biomedical image analysis on a cooperative cluster of GPUs and multicores 25

Author's retrospective for: Biomedical image analysis on a c...

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25th ACM International Conference on Supercomputing, ICS 2014

作者： Hartley, Timothy D. R. Çatalyürek, Ümit V. Ruiz, Antonio Igual, Francisco Mayo, Rafael Ujaldon, Manuel Intel Corporation Software and Services Group HillsboroOR United States Dept. Biomedical Informatics Ohio State University ColumbusOH43210 United States Computer Architecture Dept. University of Malaga Malaga Spain Computer Architecture and Automatic Control Dept. Univ. Complutense of Madrid Madrid Spain Dept. of Computer Eng. and Computer Science University Jaume I Castellon Spain

ISBN: (纸本)9781450328401

The last six years has seen Moore's Law continue to produce incredible gains in computational power. Indeed, the November, 2007 list of the top ten fastest supercomputers in the world contained no machines with acceleration of any kind. The same list six years later has four of the ten fastest supercomputers using accelerators, including the top two machines [3] . And the ten greenest supercomputers in November 2013 are using NVIDIA GPUs [1]. This heterogeneity of processing units is present from the top of the computational power spectrum down to the bottom, where GPU hardware coupled with novel CUDA and OpenCL programming paradigms have brought significant performance gains to consumer-grade applications. Copyright © 2014 by the Association for Computing Machinery, Inc. (ACM).

关键词： Graphics processing unit

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Second-order particle MCMC for Bayesian parameter inference

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IFAC Proceedings Volumes 2014年第3期47卷 8656-8661页

作者： Johan Dahlin Fredrik Lindsten Thomas B. Schön Division of Automatic Control Linköping University Sweden Dept. of Engineering University of Cambridge United Kingdom Division of Systems and Control Uppsala University Sweden

We propose an improved proposal distribution in the Particle Metropolis-Hastings (PMH) algorithm for Bayesian parameter inference in nonlinear state space models. This proposal incorporates second-order information about the parameter posterior distribution, which can be extracted from the particle filter already used within the PMH algorithm. The added information makes the proposal scale-invariant, simpler to tune and can possibly also shorten the burn-in phase. The proposed algorithm has a computational cost which is proportional to the number of particles, i.e. the same as the original marginal PMH algorithm. Finally, we provide two numerical examples that illustrates some of the possible benefits of adding the second-order information.

关键词： Bayesian inference Particle Markov Chain Monte Carlo Sequential Monte Carlo

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On Applying MDE for Generating Reconfigurable Automation Systems

On Applying MDE for Generating Reconfigurable Automation Sys...

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International Conference on Industrial informatics

作者： Rafael Priego Aintzane Armentia Elisabet Estévéz Marga Marcos Dept. of Automatic Control and System Engineering ETSI Bilbao Basque Country University (UPV/EHU) Bilbao Spain Dept. Ingenieria Electrónica y Automática EPS de Jaén University of Jaén Jaén Spain

ISBN: (纸本)9781479966509

The continuous changes on the market and customer demands have forced modern automation systems to provide more strict Quality of Service (QoS) requirements such as load balance or full availability of the control system, among other characteristics. In order to cope with these demanding requirements, modern automation systems have started to incorporate novel design approaches which include reconfiguration mechanisms. Following this trend, this paper presents the use of MDE techniques and technologies, to help in the definition of the control system of reconfigurable automation plants. Directly from the model-based design, a model-based tool is derived that provides support for the generation of the elements that compose the reconfigurable control system.

关键词： MDE Availability Automation System Mechatronic components

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