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Robustly Feasible Optimizing control of Network systems under Uncertainty and Application to Drinking Water Distribution systems

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IFAC Proceedings Volumes 2010年第8期43卷 304-309页

作者： Vu Nam Tran Mietek. A. Brdys School of Electronic Electrical and Computer Engineering College of Engineering and Physical Sciences. University of Birmingham Birmingham B15 2TT U.K School of Electronic Electrical and Computer Engineering College of Engineering and Physical Sciences University of Birmingham Birmingham B15 2TT UK Department of Control Systems Engineering Faculty of Electrical and Control Engineering Gdańsk University of Technology Gdańsk Poland

This paper addresses the dissolved oxygen tracking problem in multi-zone bioreactor. The proposed approach utilizes decentralized control system incorporating fuzzy multiregional PI controllers so that satisfactory controller performance can be robustly and reliably achieved over a whole process operating range. A fuzzy supervisor of the completely decentralized control system is introduced in order to meet a global actuator capacity constraint. An overall control system can be implemented by using fairly standard equipment that is commonly available at a plant site.

关键词： multiregional PI decentralized control system parametric optimization dissolved oxygen.

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Research on Data Exchange Platform for Power Enterprise Based on ESB

Research on Data Exchange Platform for Power Enterprise Base...

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International Conference on Computational Intelligence and Software Engineering (CiSE)

作者： Yaling Wang Pishi Sun Wenbin Zhang Zhanfeng Cao Applied Science Private University Beijing China Electromobility Sub-systems Volvo GTT Advanced Technology & Research Göteborg Sweden Electric Power Research Institute Puhua Information Technology Company Limited Beijing China School of Control and Computer Engineering North China Electric Power University Beijing China Faculty of Mechanical Engineering University of Ljubljana Ljubljana Slovenia

Since data sharing mechanism between the various business systems lacks of specification and standardization, information shares hardly and data exchange are inefficient, the paper proposes a data exchange platform for power enterprise based on ESB, which is based on SOA architecture, unified data exchange standards by using XML, used SOAP/HTTP(S) as the data transfer protocol between business systems and services bus and used Web Services as the business system data exchange standard interface. BEA ALSB service bus provides data exchange services for registration, release, information, routing and other functions. Practice has proved that the platform has good flexibility and scalability and can meet the business enterprise system between all kinds of complex data exchange requirements.

关键词： Business Service oriented architecture Marketing and sales Security Routing Databases

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Dynamic stability and control design of modern electric energy systems with large penetration of distributed generators

Dynamic stability and control design of modern electric ener...

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iREP Symposium on Bulk Power System Dynamics and control

作者： M. Honarvar Nazari M. Ilić J. Peças Lopes Electrical Engineering K.N. Toosi University of Technology Iran Energy Systems Engineering Sharif University of Technology Iran Carnegie Mellon University Pittsburgh PA USA Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology Cambridge MA USA University of Illinois Urbana-Champaign USA Control of Future Electricity Network Operations in the Faculty of Technology Delft University of Technnology Delft Netherlands Cornell University Ithaca NY USA Department of Electrical Engineering of the Faculty of Engineering of University of Porto Portugal

This paper investigates dynamic stability and control design of modern electric energy systems as many MW-scale distributed generators (DG) of various types are deployed in the distribution side of electric systems. The paper is mainly concerned about small-signal frequency stability of distribution systems with decentralized or centralized control systems. The Gerschgorin Circle Theory and Hicks Stability Theory are used for verifying sufficient conditions for small-signal stability. The paper also discusses about designing advanced enhancing robustness methods to ensure both safety and stability of modern distribution systems. Finally, the paper closes with a discussion of policies needed to support large penetration of DG units in distribution systems to ensure safety and robustness of the system.

关键词： Stability criteria Centralized control Power system stability Distributed control Frequency control Mathematical model

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A non-trivial approach for low-frequency magnetic field simulation and visualization

A non-trivial approach for low-frequency magnetic field simu...

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作者： Dimitrova, Virginia Todorova Goranova, Mariana Evstatieva Faculty of Computer Systems and Control Technical University of Sofia 8 St. Kliment Ohridski street 1000 Sofia Bulgaria

ISBN: (纸本)9789604741137

The article presents a program decision that is intended to assist engineers and medical specialists to design and apply electromagnetic devices for therapeutic purposes. The suggested approach for the problem solving is non-trivial because it combines the power of the existing graphics package with the possibilities of a new code for electromagnetic calculations. The presented program decision demonstrates precise numerical results complemented by an understandable and attractive graphical representation. The implemented approach allows a high level of interaction during the whole process that includes: selection of a 3D model of human body part, creation and positioning of field sources, calculation and visualization of the summary field.

关键词： Three dimensional computer graphics

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Discrete time minimax tracking control with disturbance estimation 10

Discrete time minimax tracking control with disturbance esti...

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2009 10th European control Conference, ECC 2009

作者： Bauer, Peter Kulcsar, Balazs Bokor, Jozsef Systems and Control Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences BudapestH-1111 Hungary Delft Center for System and Control Faculty of Mechanical Maritime and Materials Engineering Technical University of Delft Mekelweg 2 Delft Netherlands

ISBN: (纸本)9783952417393

The paper proposes an alternative way to solve robust reference tracking problem. Instead of rejecting the effect of the disturbance directly, an intermediate step is built into the state estimation problem. The advantage of the methodology is to elaborate a modified optimal state estimation problem taking the unbiased estimate of the disturbance into account. Henceforward, the solution of the discrete time, optimal LQ minimax tracking problem is modified and subjected to attenuate the disturbance residual. The paper addresses the nominal case for constant reference and disturbance signal showing the asymptotical stability and the tracking performance of the discrete time, optimal min-max control. Suboptimal solution is given for time varying reference and disturbance signal. A linearized hovering quadrotor example demonstrates the importance of the suggested technique. © 2009 EUCA.

关键词： State estimation

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Developing Collaborative Peer-to-Peer Applications on Mobile Devices

Developing Collaborative Peer-to-Peer Applications on Mobile...

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13th International Conference on computer Supported Cooperative Work in Design

作者： Sapateiro, Claudio Baloian, Nelson Antunes, Pedro Zurita, Gustavo Systems and Informatics Department Polytechnic Institute of Setubal Portugal Department of Computer Science University of Chile Santiago de Chile Chile Informatics Department Faculty of Sciences University of Lisbon Portugal Management Control and Information Systems Department Business School Universidad de Chile Chile

ISBN: (纸本)9781424435340

Mobile computing has experienced a rapid growth and there are nowadays many applications being developed. According to the literature, many of these applications are designed for collaborative work or learning and share the same requirements: they implement a peer-to-peer communication architecture, there are subgroups inside the group of participants which have to work together and coordinate with the rest of the groups and they need to implement a proper human-computer interaction paradigm since they have a reduced area to interact with the application's interface. It is then quite natural to think about the development of a framework supporting this kind of applications. In this paper we present such a framework and an example of its application.

关键词： mobile computing collaborative computing middleware peer-to-peer architectures

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Developmental process of a chopstick-like hybrid-structure two-fingered micromanipulator hand for 3-D manipulation of microscopic objects

Developmental process of a chopstick-like hybrid-structure t...

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作者： Ramadan, Ahmed A. Takubo, Tomohito Mae, Yasushi Oohara, Kenichi Arai, Tatsuo Computer Engineering and Automatic Control Department Faculty of Engineering Tanta University Tanta 31527 Egypt Department of Systems Innovation Graduate School of Engineering Science Osaka University Osaka 560-8531 Japan

The development of a chopstick-like two-fingered micromanipulator based on a hybrid mechanism is presented. The microhand consists of two 3-prismatic-revolute-spherical (PRS) parallel modules connected serially in a mirror image style. Each module has a long glass pipette as an end effector. The development process consists of three phases. In the first phase, analysis and mathematical modeling, a novel solution of the inverse kinematics problem (IKP) of a 3-revolute-prismatic-spherical (RPS) parallel module, is derived and applied with proper modification to the case of 3-PRS of the proposed mechanism. The solution is extended to the two-fingered hybrid mechanism of the microhand. In the optimization and design phase, the optimization of the chosen design parameters of a theoretical 3-PRS parallel module is carried out using two approaches: discretization method and genetic algorithms. Based on the optimal design parameters, a CAD model of the 3-PRS finger module is built, and a complementary optimization step using the ANSYS Workbench program is carried out to determine suitable characteristics of the pin flexure hinge. Finally, the total CAD model of the two-fingered hand is built. In the realization and implementation phase, the description of the hardware system of the two-fingered microhand prototype is presented. The program description, calibration method, practical Jacobian matrices, practical workspace, and error analysis of the prototype are discussed. © 2009 IEEE.

关键词： Genetic algorithms

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Estimating the state of distributed dynamical systems based on limited measurements by means of cooperative filtering with application to ad-hoc vehicle networks

Estimating the state of distributed dynamical systems based ...

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7th IFAC International Symposium on Fault Detection, Supervision and Safety of Technical systems, SAFEPROCESS'09

作者： Edelmayer, A. Miranda, M. Systems and Control Laboratory Computer and Automation Research Institute Hungarian Academy of Sciences Kende u. 13-17 H-1111 Budapest Hungary Faculty of Engineering University of Los Andes Merida Venezuela

ISBN: (纸本)9783902661463

In this paper a decentralized approach to state estimation of distributed dynamical systems over unreliable communication network subject to uncertain and limited measurements is addressed. Specifically, a distributed filtering concept for enhancing the estimation accuracy of vehicles state from uncertain position data in ad-hoc vehicle networks is presented. The filter relies on a variety of position measurements obtained from the on-board vehicle positioning system, from other nearby cooperating vehicles, as well as from the immediate roadside environment via communication. Direct distance measurements between vehicles as well as between vehicles and the static elements of the roadside infrastructure can be used, if available, as highly accurate reference measurements. The paper demonstrates how successfully the idea of cooperative filtering in addressing the demands of both sensor fault tolerance and enhanced estimation accuracy in distributed systems over ad-hoc communication networks can be used. © 2009 IFAC.

关键词： State estimation

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Discontinuous stabilizer of the first order chained system using polar-like coordinates transformation 10

Discontinuous stabilizer of the first order chained system u...

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2009 10th European control Conference, ECC 2009

作者： Pazderski, Dariusz Kozlowski, Krzysztof Tar, Jozsef K. Faculty of Computer Science and Management Control and Systems Engineering Poznan University of Technology ul. Piotrowo 3a Poznan60-965 Poland John von Neumann Faculty of Informatics Institute of Intelligent Engineering Systems Budapest Tech Bécsi út 96/BH BudapestH-1034 Hungary

ISBN: (纸本)9783952417393

This paper considers problem of stabilization of the first order nonholonomic chained system using polar-like coordinates. A control method considered here can be regarded as an extension of control solution based on polar coordinate transformation in order to apply it to other system than unicycle. Presented control strategy gives possibility to obtain fast convergence of regulation errors without oscillatory behavior. A robustness of the controller in the neighborhood of the desired point is ensured via additional non-smooth techniques. In order to verify usefulness of developed control strategy simulation results are given. © 2009 EUCA.

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Modeling of hot rolling industrial process using fuzzy logic

Modeling of hot rolling industrial process using fuzzy logic

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22nd International Conference on computer Applications in Industry and Engineering 2009, CAINE 2009

作者： Sheta, A. Öznergiz, E. Abdelrahman, M.A. Babuska, R. Giza Egypt Automatic Control Department Mechanical Engineering Faculty Istanbul Technical University Istanbul 34437 Turkey Electrical and Computer Engineering Department Tennessee Technological University Cookeville TN 38505 United States Delft Center for Systems and Control Delft University of Technology Netherlands

ISBN: (纸本)9781615676668

Steel making is known as a complex manufacturing industrial process. Automation of the process represents a challenge. Empirical mathematical modeling of the process was used to design mill equipment, ensure productivity and service quality. This modeling approach shows many problems associated to complexity and time consumption. Soft computing techniques show significant modeling capabilities on handling complex nonlinear systems modeling. In this paper, we explore the use of Takagi-Sugeno (TS) technique to develop fuzzy models for the Hot-Rolling industrial nonlinear process. We propose three models for the rolling force, torque and slab temperature. A set of rules and membership functions which represents the dynamical relationship between the input and output of these models shall be presented. The performance of the fuzzy models will be compared to the known empirical models for the hot rolling system. Experimental data measured from the Ere˜gli Iron and Steel Factory in Turkey shall be used for the verification of the model outstanding performance.

关键词： Hot rolling

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