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Blending for H∞ performance: a group theoretic approach

IFAC-PapersOnLine 2015年第14期48卷 186-191页

作者： Z. Szabò J. Bokor F. Schipp Institute for Computer Science and Control Hungarian Academy of Sciences Budapest Kende u. 13-17 Hungary Institute for Computer Science and Control Hungarian Academy of Sciences Hungary MTA-BME Control Engineering Research Group

In order to design efficient algorithms that work on the set of controllers that fulfill a given property, e.g., stability or a norm bound, it is important to have an operation that preserves that property, i.e., a suitable blending method. Concerning stability, a traditional approach is to use the Youla parametrization and the corresponding parameters as a starting point. While this method guarantees stabilizability as the invariant property for the fairly large class of strictly proper plants, there are also other solutions to the problem. The authors already provide a detailed analysis for feedback stability placing the controller blending problem in a general setting by pointing to the basic global geometric structures that are related to well-posedness and feedback stability. In this paper these efforts are continued and the group structure corresponding to performance problems, e.g., those related to a suboptimal H ∞ design, is presented. Besides its educative value the presentation provides a possible tool for the algorithmic development.

关键词： controller parametrisation controller blending performance guarantee

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Parameterization of Limbus Distance in Van Herick Method's Angle Closure Glaucoma Diagnosis

Parameterization of Limbus Distance in Van Herick Method's A...

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International Conference of Information and Communication Technology for Embedded Systems

作者： I. S. Ardakani W. Kongprawechnon T. Theeramunkong P. Bunnun T. Isshiki A. Manassakorn School of ICT Sirindhorn International Institute of Technology (SIIT) Thammasat University PathumThani Thailand Advanced Automation and Electronics Research Unit National Electronics and Computer Technology Center Pathum Thani Thailand Tokyo Institute of Technology Global Scientific Information and Computing Center ICT Support Division Authentication and Networking Group Dept. Communications and Computer Engineering Tokyo Japan Department of Ophthalmology Faculty of Medicine Chulalongkorn University and King Chulalongkorn Memorial Hospital Thai Red Cross Society Bangkok Thailand

ISBN: (纸本)9781509022502

As a non-invasive angle closure glaucoma diagnosis procedure, Van Herick's slit-lamp Limbal Anterior Chamber Depth Estimation (LACDE) technique is preferably the current standard screening method preliminarily performed at hospitals and eye clinics. However, accuracy of depth estimation is very much dependent on the slit projection distance from the limbus (LD). This study investigated the relation and designed a parametric model to reduce the inconsistencies between results and improving the Van Herick's method accuracy. Additionally, two different types of classifiers such as Support Vector Machine (SVM) and Decision Tree with addition of LD as a predictor were trained and tested for comparison with parametric model. In the end acquired results clearly showed the effectiveness of LD consideration in LACDE, which lead to improvement in the experimental results.

关键词： Limbal Anterior Chamber Depth Measurement Van Herick Method Support Vector Machine Classifier Decision Tree Classifier

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Hamiltonian Feedback Design for Mass Action Law Chemical Reaction Networks

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IFAC-PapersOnLine 2015年第13期48卷 158-163页

作者： György Lipták Gábor Szederkényi Katalin M. Hangos Process Control Research Group Systems and Control Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences P.O. Box 63 H-1518 Budapest Hungary Faculty of Information Technology Peter Pazmany Catholic University Budapest Hungary

A special polynomial state feedback structure is proposed for open chemical reaction networks obeying the mass action law (MAL-CRNs) that stabilizes them for any of their admissible positive set of parameters. The proposed feedback makes the closed-loop system a reversible CRN that enables a generalized Hamiltonian description assuming that their number of reversible reactions is less or equal that the number of species. The design is based on solving a mixed integer linear optimization problem (MILP). A simple example is used to illustrate the basic concepts and the design method.

关键词： Process control Hamiltonian control Modelling Chemical Reaction Networks

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How the Sensitivity Measures can be Computed for Different Youla Regulators

How the Sensitivity Measures can be Computed for Different Y...

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International Conference on Cybernetics and Intelligent Systems

作者： L. Keviczky Cs. Bányász Institute of Computer Science and Automation MTA-BME Control Engineering Research Group Hungarian Academy of Sciences H-1111 Budapest Kende u 13-17 HUNGARY Institute of Computer Science and Automa tion MTA-BME Control Engineering Research Group Hungarian Academy of Sciences H-1111 Budapest Kende u 13-17 HUNGARY

Different sensitivity measures are investigated for YOULA-parameterized regulators and the influence of a new observer topology is treated

ISBN: (纸本)9781467373395

Different sensitivity measures are investigated for YOULA-parameterized regulators and the influence of a new observer topology is treated

关键词： Youlaparameterization Youla regulator sensitivity observer state-feedback model error

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Improvement of the LPV-based vehicle control design considering the polynomial invariant set analysis

Improvement of the LPV-based vehicle control design consider...

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American control Conference

作者： Balazs Nemeth Peter Gaspar Jozsef Bokor Systems and Control Laboratory Institute for Computer Science and Control Hungarian Academy of Sciences Hungary Institute for Computer Science and Control Hungarian Academy of Sciences and MTA-BME Control Engineering Research Group Hungary

ISBN: (纸本)9781479917730

The paper proposes a method for the improvement of the LPV (Linear Parameter-Varying) based control design for lateral vehicle dynamics. The novelty of the method is the combination of the LPV-based control design and the results of the analysis based on the Sum-of-Squares-based (SOS) polynomial controlled invariant set. In the LPV modeling of the lateral vehicle dynamics, the control design and the analysis of the polynomial model of the tire characteristics are also handled. The results of the analysis based on controlled invariant set are integrated in the selection of the design parameters of the LPV method. The proposed method improves performances of vehicle dynamics and handles the critical maneuvers caused by e.g. skidding car and high velocities. The proposed method is illustrated through a simulation example.

关键词： Vehicle dynamics design control design parameter Invariant Vehicle control Polynomial Models Polynomial

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Look-ahead cruise control design in VISSIM simulation environment

Look-ahead cruise control design in VISSIM simulation enviro...

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International Conference on Models and Technologies for Intelligent Transportation Systems (MT-ITS)

作者： András Mihály Balázs Németh Zsuzsanna Bede Péter Gáspár MTA-BME Control Engineering Research Group Budapest University of Technology and Economics Magyar Tudomanyos Akademia Budapest Budapest HU Department of Control for Transportation and Vehicle Systems Budapest University of Technology and Economics Institute for Computer Science and Control Hungarian Academy of Sciences and MTA-BME Control Engineering Research Group

The paper deals with the design of individual vehicle speed, taking into account the topographical characteristics of the road, the speed limit and the current traffic conditions. The look-ahead speed selection algorithm is implemented in microscopic traffic simulation environment V ISSIM u sing COM interface and MATLAB programming. The proposed look-ahead control is tested and analyzed on one of main transportation roads in Hungary namely between Tatabánya and Györ. The main novelty of the paper is the implementation of the look-ahead control in a realistic traffic environment, where the benefits of the method can be tested during different traffic conditions.

关键词： Vehicles Roads Acceleration Microscopy

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Design of look-ahead cruise control using road and traffic conditions

Design of look-ahead cruise control using road and traffic c...

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American control Conference

作者： Peter Gaspar Balazs Nemeth Institute for Computer Science and Control Hungarian Academy of Sciences and MTA-BME Control Engineering Research Group Hungary Institute for Computer Science and Control Hungarian Academy of Sciences Kende u. 13-17 H-1111 Budapest Hungary

ISBN: (纸本)9781479917730

The purpose of the look-ahead control is to design the speed of a vehicle in order to minimize longitudinal control energy while keeping travelling time and, moreover, considering topographic data and speed limits along the road. The paper proposes the extension of the control design with local traffic information in such a way that a balance between the designed speed and the traffic flow is guaranteed. A method has been elaborated for the design of a decision algorithm for lane-change maneuvers based on the consideration of surrounding vehicles. The method is illustrated through a complex simulation example based on the CarSim software.

关键词： Road CRUISE control design control Traffic flow Traffic Lane changing Speed limit Traffic information vehicle LONGITUDINAL control local traffic Power control

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Influence of the Manipulation of the Polytopic Tensor Product Model Representation on the control Performance of LMI Based Design

Influence of the Manipulation of the Polytopic Tensor Produc...

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IEEE International Conference on Systems, Man and Cybernetics

作者： Alexandra Szöllósi Péter Baranyi Péter Várlaki Hungarian Academy of Sciences and Budapest University of Technology and Economics Department of Telecommunications and Media Informatics 3D Internet based Control and Communications Laboratory Computer and Automation Research Institute 3D Internet based Control and Communications Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences Multidisciplinary Doctoral School of Engineering Sciences Szechenyi István University

ISBN: (纸本)9781479986989

The paper studies the effect of the manipulation of the polytopic TP model representation of a given quasi Linear Parameter Varying (qLPV) state-space model on the control performance results. The investigated model in the case study consists of the extended, Stribeck friction included three degrees of-freedom version of the aero elastic wing section of the Nonlinear Aero elastic Test Apparatus (NATA) model. The investigation is carried out through the Tensor Product (TP) model transformation based control Design Framework, which bridges the manipulation of the polytopic representation and Linear Matrix Inequality (LMI) based control design methods. Different TP model representations of the given qLPV model are derived: a TP model representation with a sum-normalized non-negative (SNNN) convex hull, a TP model representation with a close to-normal (CNO) convex hull and interpolated TP model representations. Upon these representations Linear Matrix Inequality based design methods are applied to attain the controller and observer system components. The resulting control systems are tested through numerical simulation and their performance are compared and evaluated. The paper presents results, where the interpolated representations lead to better control performance results, which indicates, that the manipulation of the polytopic TP model representation may lead to further potential optimization possibilities. Also, this shows, that in order to find the optimal solution the manipulation is a necessary and important step.

关键词： Mathematical model Numerical models Observers control design Tensile stress Interpolation Numerical simulation

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Modification of Electric Drive Vehicles Performances Using a Direct Torque control with Over-Modulation Ability

Modification of Electric Drive Vehicles Performances Using a...

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Annual Conference of the IEEE Industrial Electronics Society

作者： Ahmad Ghaderi Javad Soltani Mohammad Ebrahimi Amir Ali Forough Nassiraei Research & Development Department Automotive Motor and Electronic Control Group Department of Electrical & Computer Engineering Isfahan University of Technology Graduate School of Life Science and Systems Engineering Kyushu Institute of Technology

ISBN: (纸本)9781479917631

In electric and hybrid-electric vehicles, the inverter output voltage is limited by available DC-link voltage, which restricts the vehicle speed and acceleration. Therefore the fundamental component of the motor voltage should be increased by operating inverter in the six-step mode at high speeds. Although hysteresis based direct torque control (DTC) is a straightforward approach and has several advantages, this method cannot work in the six-step mode. In this paper a new hysteresis based DTC with over modulation ability for interior permanent magnet synchronous machines (IPMSM) is suggested. In this method, unlike the previously proposed methods, the calculation of the voltage vector or flux reference in different phase angles is not necessary. In the proposed method, the flux trajectory is changed by adjusting the non-switching area and modifying switching table, and thus a seamless transformation between high-frequency switching and six-step square wave is possible. Also in this paper, the dynamic model for an electric vehicle is developed which its traction motor is controlled by proposed DTC. The simulation results prove that the proposed method modify the vehicle performances, notably. These results show that the vehicle with proposed method has a higher top speed and better acceleration. Also it is shown, that the proposed method can improve the vehicle efficiency for various driving cycles. In addition the results confirm the torque discontinuity does not appear in the whole range of vehicle speed.

关键词： Over-modulation Direct torque control Seamless Vehicle Electric vehicles Hybrid vehicles IPMSM Motor Six-step operation direct torque control overmodulation Hybrid electric vehicles Electric vehicles vehicle Vehicle speed Motor voltage vector SEAMLESS Vehicle performance

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The 5th International Conference on Biomedical engineering and Biotechnology (ICBEB 2016) Abstracts

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BMC MEDICAL IMAGING 2016年第SUPPL 1期16卷 65-65页

作者： [Anonymous] Department of MRI Shandong Medical Imaging Research Institute Affiliated to Shandong University Jinan Shandong 250021 People’s Republic of China Department of Interventional Radiology Shandong Provincial Hospital Affiliated to Shandong University Jinan Shandong 250021 People’s Republic of China College of Information Science and Technology Engr. Research Center of Digitized Textile & Fashion Tech. for Ministry of Education Donghua University Shanghai 201620 China Intelligent multimedia information processing Lab College of Software Northeastern University Shenyang Liaoning Province 110004 China Institute of Biomedical and Health Engineering Shenzhen Institutes of Advanced Technology Chinese Academy of Sciences Shenzhen 518055 China School of Computer Science and Technology Nanjing Normal University Nanjing China Department of Electrical Engineering The City College of New York CUNY New York USA Jiangsu Key Laboratory of 3D Printing Equipment and Manufacturing Nanjing China School of Electronic Science and Engineering Nanjing University Nanjing Jiangsu 210046 China College of Engineering Nanyang Technological University Singapore 639798 Singapore School of Electronic Information Shanghai Dianji University Shanghai China School of Natural Sciences and Mathematics Shepherd University Shepherdstown WV 25443 USA Davis College of Agriculture Natural Resources and Design West Virginia University Morgantown WV 26505 USA State Key Laboratory of Millimeter Waves Southeast University Nanjing 210096 China Center of Medical Physics and Technology Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei China College of Agricultural and Life Sciences University of Florida Gainesville FL 32611 USA Courant Institute of Mathematical Sciences New York University New York NY 10012 USA Translational Imaging Division & MRI Unit Columbia University and New York State Psychiatric Institute New York NY 10032 USA Guangxi Key Laboratory of Manufacturing System & Adv

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