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On model order determination for errors-in-variables estimation *

IFAC Proceedings Volumes 2012年第16期45卷 1347-1352页

作者： Torsten Söderström Liuping Wang Division of Systems and Control Department of Information Technology Uppsala University P O Box 337 SE-75105 Uppsala Sweden School of Electrical and Computer Engineering RMIT University Melbourne Australia

When identifying a dynamic system the model order has to be determined unless it is a priori known. For an errors-in-variables situation where both input and output measurements are noise corrupted, this is a nontrivial task, seldom treated in the literature. Some different approaches for model order determination are introduced and evaluated by theoretical analysis as well as application to simulated data and to a real-life case study.

关键词： System identification errors–in–variables models linear systems covariance functions

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Modified Iterative-Learning-control-Based Ramp Metering Strategies for Freeway Traffic control With Iteration-Dependent Factors

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IEEE Transactions on Intelligent Transportation systems 2012年第2期13卷 606-618页

作者： Zhongsheng Hou Jingwen Yan Jian-Xin Xu Zhenjiang Li Advanced Control Systems Laboratory of School of Electronic and Information Engineering Beijing Jiaotong University Beijing China Department of Electrical and Computer Engineering National University of Singapore Singapore Key Laboratory of Complex Systems and Intelligence Science Institute of Automation Chinese Academy of Sciences Beijing China

For a freeway traffic system with strict repeatable pattern, iterative learning control (ILC) has been successfully applied to local ramp metering for a macroscopic freeway environment by formulating the original ramp metering problem as an output tracking, disturbance rejection, and error compensation problem. In this paper, we address the freeway traffic ramp-metering system under a nonstrict repeatable pattern. ILC-based ramp metering and ILC add-on to ALINEA strategies are modified to deal with the presence of iteration-dependent parameters, iteration-dependent desired trajectory, and input constraints. Theoretical analysis and extensive simulations are used to verify the effectiveness of the proposed approaches.

关键词： Traffic control Trajectory Mathematical model Vehicles Equations Feedback control

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Feature extraction of motor imagery in BCI with approximate entropy

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Journal of Computational Information systems 2012年第6期8卷 2485-2491页

作者： Fang, Yonghui Chen, Minyou Zheng, Xufei Harrison, Robert F State Key Laboratory of Power Transmission Equipment and System Security and New Technology Chongqing University Chongqing 400044 China School of Electronic and Information Engineering Southwest University Chongqing 400715 China College of Computer Science Sichuan University Chengdu 610065 China Department of Automatic Control and Systems Engineering University of Sheffield Sheffield United Kingdom

Approximate Entropy (ApEn) is a regularity statistic that quantifies the unpredictability of fluctuations in a time series and can classify complex systems. This study, ApEn is used to extract features from motor imagery Electroencephalogram (EEC) that containing two motor imagery tasks. This method is different from the traditional way to get the character from EEC. Appropriate parameters must been chosen for different dataset. Two datasets are used in this paper. One comes from BCI Competion2003, the other from the lab of Electromagnetic theory and artincal intelligence, Chongqing University. The results show that ApEn can extract different features in left-hand and right-hand motor imagery EEC efficiently. Comparison between ApEn and Fast Fourier Transform (FFT) shows that ApEn has good capability to the two imagery tasks Brain computer Interface. © 2012 Binary Information Press.

关键词： Electroencephalography

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Robust positive invariance and ultimate boundedness of nonlinear systems

Robust positive invariance and ultimate boundedness of nonli...

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Mediterranean Conference on control and Automation (MED)

作者： George Bitsoris Marina Vassilaki Nikolaos Athanasopoulos Control Systems Laboratory of the Electrical and Computer Engineering Department University of Patras Patras Greece Department of Electrical Engineering School of Pedagogical and Technological Education Athens Greece Electrical Engineering Department Eindhoven University of Technology Eindhoven Netherlands

In this article the problem of characterizing sets, described by vector nonlinear inequalities of the form v(x) ≤ w, as robustly positively invariant and targets of uniformly ultimate bounded nonlinear systems is investigated. The class of general parameter uncertain continuous-time dynamical systems affected by exogenous disturbances is considered. The approach is based on establishing an associated monotone nonlinear comparison system. A numerical example is presented to illustrate the approach.

关键词： Robustness Vectors Nonlinear systems Uncertain systems Trajectory Linear matrix inequalities Differential equations

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New approaches in 2D modeling of objects and points of interest

New approaches in 2D modeling of objects and points of inter...

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International Carpathian control Conference (ICCC)

作者： Lacezar Licev Tomas Pytlik Marek Babiuch Radim Farana Department of Computer Science Faculty of Electrical Engineering and Computer Science VSB Technical University of Ostrava Ostrava Czech Republic Department of control Systems and Instrumentation Faculty of Mechanical Engineering VSB Technical University of Ostrava Ostrava Czech Republic

This paper describes the processing of photographs in the newly created module for 2D modeling, which will be integrated into the system FOTOM NG . This is a usable application in medicine to analyze images of probes and non-invasive examination developed at the department of computer science of the technical university of Ostrava. The module will be his purpose and functionality to build on a previous version of module Fotom2 of system FOTOM, but will be expanded to meet the requirements of a modern system. The module will be implemented on the NetBeans Platform. In the paper we describe the 2D modeling, analyzing the existing software requirements specifications for the new module, selecting software tools, and the subsequent design and implementation.

关键词： Monitoring Gravity Image color analysis Libraries Connectors Java Computational modeling

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Parameters measurement of observed object from recording

Parameters measurement of observed object from recording

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International Carpathian control Conference (ICCC)

作者： Lacezar Licev Petr Zajic Marek Babiuch Radim Farana Department of Computer Science Faculty of Electrical Engineering and Computer Science VSB Technical University of Ostrava Ostrava Czech Republic Department of control Systems and Instrumentation Faculty of Mechanical Engineering VSB Technical University of Ostrava Ostrava Czech Republic

This paper describes development of the module, which analyzes medical images and its use is also possible in sectors other than medicine. A software module can base on events captured on the ECG graph store images, which the event concerned. Since the ECG chart is only available on video, you will need to analyze this video and chart to properly recognize it. This module plugged together with two other simultaneously developed modules in the FOTOM 2009 will make a brand new version of this application FOTOM NG .

关键词： Electrocardiography Java Streaming media Strips Reservoirs

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On Optimality Criteria for V2G Charging Strategies

On Optimality Criteria for V2G Charging Strategies

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International Conference on Connected Vehicles and Expo (ICCVE)

作者： S. Stüdli W. Griggs E. Crisostomi R. Shorten Centre for Complex Dynamic Systems and Control School of Electrical Engineering and Computer Science University of Newcastle Australia Hamilton Institute National University of Ireland Maynooth Ireland Department of Energy and Systems Engineering University of Pisa Italy

ISBN: (纸本)9781467347051

There is a growing interest in treating EVs not only as controllable loads, but also as storage systems, which are able to reduce stresses on the grid during peak times by injecting power back, also known as Vehicle to Grid (V2G). In this paper, we formulate the problem of returning electrical load to the grid as an optimisation problem whose goal is to minimise the costs of drawing energy from the vehicles, while maintaining the effect of energy return on the environment below a safety level.

关键词： optimisation reduce energy Energy sources vehicle energy feedback Peak time Electric loads grids Cache Memory System Grid computing CHARGING(ACCOUNTTNG) optimality charging Reduce Reduce

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Smart Grid Modeling Approach for Wide Area control Applications

Smart Grid Modeling Approach for Wide Area Control Applicati...

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IEEE Power and Energy Society General Meeting

作者： Aaron St. Leger John James Dean Frederick Electrical Engineering and Computer Science department at the United States Military Academy West Point NY 10996 USA Saratoga Control Systems Inc.

ISBN: (纸本)9781467327275

This paper describes an approach for modeling smart grids for wide area control applications. More specifically, it is proposed to model smart grids as a set of interdependent composite networks. A composite network is one whose evolution in time and/or space is described as a composition of more than one category of networks. This work proposes an interconnection of a communication network, information network, and a power system network to model smart grids. More specifically this work proposes a quantitative model focusing on bulk generation and transmission. The resulting model will be used for studying and simulating wide area measurement and control techniques and contingencies of components. The modeling methodology is based on the initial partitioning by the National Institute of Standards and Technology (NIST) of the smart grid domains. A basic example with control of load (demand response) and generator set points over a communication link is presented.

关键词： Smart Grid Communication Network Modeling Power System Modeling Wide Area Measurement and control Smart grids NIST Telecommunication links composite network system network Standing Orders Modeling Wide area measurement systems

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Modeling fuzzy temporal criteria in database querying

Modeling fuzzy temporal criteria in database querying

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

作者： Cornelia Tudorie Mihai Vlase Cristina Nica Dan Munteanu Department of Computer and Information Technology Faculty of Automatic Control Computers Electrical Engineering and Electronics Dunãrea de Jos Galati University Romania Dunãrea de Jos Galati University Romania

Expressing user's preferences in database querying is best achieved by fuzzy modeling of linguistic terms included in selection criteria. This paper deals with temporal criteria, for querying date/time columns in classical relational databases. Fuzzy models for some linguistic terms and ways to operate with them, in order to evaluate queries, are proposed.

关键词： Pragmatics Computational modeling Relational databases Calendars computers Knowledge based systems

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A cross-layer approach to design an Internet Protocol Packet Delay Variation estimator for video streaming services

A cross-layer approach to design an Internet Protocol Packet...

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IEEE Instrumentation and Measurement Technology Conference

作者： L. Angrisani D. Capriglione L. Ferrigno G. Miele Department of Computer Science and Control Systems University of Naples Federico II Naples Italy Department of Electrical and Information Engineering Southern Lazio University of Cassino Cassino Frosinone Italy

Measurement of Internet Protocol Packet Delay Variation (IPDV) is a relevant issue in application involving real time video streaming. Generally, this quantity is compared with predefined thresholds (whose value depends upon the application requirements) to verify the quality of service to the end user. However, the exceeding of this threshold only for short time intervals and with relatively low repetition rates, generally does not imply a significant decrease of the user perceived quality. Vice-versa, IPDV values not exceeding the admitted threshold but very close to this value for long time intervals and characterized by relatively high repetition rates can significantly affect the user perceived quality. Consequently, a study of the correlation among the measured IPDV values and some performance metrics directly related to the quality perceived by the user has to be accurately investigated. On the other hand, literature concerning with IPDV evaluation does not provide some important information about the measurement procedure, such as measurement rate, how to collect the obtained result in a single estimator, the time interval on which the estimator is evaluated, and so on. Consequently, the absence of these important aspects about the measurement procedure makes very critical the comparison between the evaluated IPDV and the above-mentioned thresholds, thus making even more ambiguous the evaluation of the quality of service to the end user. In this framework, the aim of the paper is to design and fine tune an IPDV estimator able to reliably estimate and detect the objective service degradation from the user perspective.

关键词： Streaming media Transform coding Time measurement Quality of service Protocols Degradation

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