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DYNAMIC ANALYSIS AND control OF CHEMICAL AND BIOCHEMICAL REACTION NETWORKS

IFAC Proceedings Volumes 2006年第2期39卷 165-170页

作者： Irene Otero-Muras Gábor Szederkényi Antonio A. Alonso Katalin M. Hangos Department of Process Engineering IIM-CSIC Eduardo Cabello 6 36208 Vigo Spain Process Control Research Group Computer and Automation Research Institute H-1518 Budapest P.O.Box 63 Hungary

Metabolic or cell signalling pathways are examples of biochemical networks exhibiting possible complex dynamics in the form of steady-state multiplicity, sustained oscillations or even deterministic chaos. The origin of these nonlinear phenomena is not always well understood, nor it can be systematically predicted beyond a case by case basis. Despite considerable progress in dynamic aspects, efforts are still needed to develop efficient and robust methods of stabilization and control of reaction networks. In this work, we combine concepts and tools from irreversible thermodynamics and systems theory to explore the underlying dynamic properties of a general class of chemical and biochemical networks. Lyapunov and passivity based methods are given for the systematic design of globally stabilizing feedback controllers in both the concentration space and a novel minimal description of the kinetic networks dynamics: the reaction space.

关键词： biochemical reaction networks passivity nonlinear control entropy

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Intelligent Components and Object-Oriented Concept for CIM

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IFAC Proceedings Volumes 1994年第4期27卷 415-419页

作者： Th. Borangiu A. Popescu University POLITEHNICA of Bucharest Department of Computer Process Control 313 Spl. Independentei sector 6 77206 Bucharest ROMANIA

The intelligence of the CAM segment involves three distinct areas: the physical layer (hardware devices); the real-time process management software (knowledge-based decisions); the open, modular CAM software (object-oriented concept). Considering a case study for a multifunctional manufacturing structure producing mechanical assemblies, the paper proposes intelligent control components and a new organization of the CAM software system (ICAM). The Open System Approach allows, through a set of utilities and standard information data bases, to modify and interconnect any devices/programs produced by different manufacturers, or user-developed. The solution for the flexible ICAM software is given by the Object-Oriented Concept. Software connectors have been used between objects to emulate electrical and mechanical links, by means of the message passing technique. Events are transformed into messages between objects based on the Event Driven Architectural Concept. Final aspects are reported in the paper concerning the modular structure of the ICAM software.

关键词： CAM sensory-based control robotics object-oriented software open systems intelligent manufacturing systems CIM

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Computing realizations of reaction kinetic networks with given properties

Computing realizations of reaction kinetic networks with giv...

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International Research Workshop: Coping with Complexity: Model Reduction and Data Analysis

作者： Szederkényi, Gábor Hangos, Katalin M. Csercsik, Dávid Process Control Research Group Computer and Automation Research Institute Hungarian Academy of Sciences Budapest 1518 Hungary Department of Electrical Engineering and Information Systems University of Pannonia Egyetem u. 10 Veszprém 8200 Hungary

ISBN: (纸本)9783642149405

The solution to the problem of finding the reaction kinetic realization of a given system obeying the mass action law containing the minimal/maximal number of reactions and complexes is shown in this paper. The proposed methods are based on Mixed Integer Linear Programming where the mass action kinetics is encoded into the linear constraints. Although the problems are NP-hard in the current setting, the developed algorithms give a usable answer to some of the questions first raised in [1].

关键词： Reaction kinetics

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Design and Implementation of Practical Digital PID controllers

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IFAC Proceedings Volumes 1989年第18期22卷 115-121页

作者： L. Rozsa Department of Process Control Computer and Automation Institute of the Hungarian Academy of Sciences Kende u. 13-17 H 1111 Budapest Hungary

Literature on process control is awash with contributions made in the field of digital controller design. On the one hand there are great efforts to devise new control algorithms and controller design methods based on elegant mathemtics and state variables concealing even the most rudiræntary inner workings of a real process. Results are mostly documented by simulations. On the other hand there are contributions directed towards improving the digital equivalent of the traditional PID controller. The debate over the virtues of different versions of the PID algorithm gave way lately to the adaptive tuning of these controllers. This way a definite shift of emphasis can be noticed, but - at least in the author’s opinion - a general view, encompassing all of the basic features of a practical digital PID controller is still lacking. This paper is an attempt to meet this need.

关键词： Digital PID cascade feedforward and override control

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Results of using a Tuyère Phenomena Detection System

Stahl und Eisen

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Stahl und Eisen 2014年第9期134卷 39-48页

作者： Zewe, Horst Daelman, Alain Reuter, Yves Van Dorpe, Pierre Simoes, Jean-Paul Manager PCI Plant and Slag Granulation Blast Furnace Rogesa Roheisengesellschaft Saar mbH Dillingen Germany Support Manager Process Blast Furnace ArcelorMittal Gent Gent Belgium Applications Developer EIC Process Control and Modelling Belgium Department Blast Furnace Plant and Process Paul Wurth S.A. Luxembourg

In order to reduce the blast furnace coke rate, pulverized coal is injected through lances into the raceway in front of the tuyeres. Close inspection of the tuyeres is particularly important as critical incidents such as a tuyere blockage or burning of the injection lance can happen at any time. To increase Operation safety, Paul Wurth has developed the Tuyère Phenomena Detection System, a camera-based monitoring system for the tuyère and raceway area. The system allows simultaneous monitoring of all tuyères from a safe distance. At the same time an image recognition system processes the camera images to automatically detect phenomena of the injection lance and the tuyère.

关键词： Blast furnaces

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On a Class of Adaptive PID Regulators

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IFAC Proceedings Volumes 1983年第9期16卷 81-82页

作者： J. Hetthéssy L. Keviczky Cs. Bànyàsz Department of Automation Technical University of Budapest Budapest Hungary Process Control Department Computer and Automation Institute of the Hungarian Academy of Sciences Budapest Hungary

Based on some relations discovered between the deterministic servo regulator and the PID design a simple design role is presented for stable processes to ensure 5% relative overshoot for the closed loop step response. The adaptive solution is based on the explicit identification of a second order process model with time delay. Extending the PID regulator by an appropriate correcting term the poorly damped or inverse unstable process zero is allowed to be a zero of the closed loop system, as well. Additional pole placement is also available.

关键词： Adaptive control PID control process control sampled data systems

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The Tinyphoon's control concept

The Tinyphoon's control concept

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2006 IEEE International Conference on Mechatronics, ICM

作者： Novak, Gregor Roesenert, Charlotte Bader, Markus Deutsch, Tobias Jakubek, Stefan Krywult, Stefan Seyr, Martin Institute of Computer Technology Vienna University of Technology Vienna Austria Department of System Design Faculty of Science and Technology Keio University Yokohama Japan Division of Control and Process Automation Institute for Mechanic and Mechatronic Vienna University of Technology Vienna Austria

ISBN: (纸本)0780397134

control concepts for mobile service robots are a key issue in robotic research. With the use of mobile robots in the domestic area, further challenges entails new designs facilitating efficient control concepts for fast motion with reduced computational capacity. This paper presents motion control designed for an autonomously acting two-wheel driven robot, which fits in a cuboid with 75x75x150mm. Due to the outstanding design of mechanical and electrical components, the robot is capable to perform high precision movements up to a speed of 2.5m/s, featuring a vision unit that allows a fast environment recognition interpreting current position based on an application dependent world model. Based on predictive control algorithms, trajectory tracking and point stabilization are facilitated. The use of real-time communication for all units allows fast interaction of all components exchanging information, which is indispensable for fast motion control. © 2006 IEEE.

关键词： control theory

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STATE OF THE ART ON TRANSITIVITY OF RECIPROCAL RELATIONS

STATE OF THE ART ON TRANSITIVITY OF RECIPROCAL RELATIONS

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第11届国际模糊系统协会世界大会

作者： Bernard De Baets Hans De Meyer Department of Applied Mathematics Biometrics and Process Control Ghent University Department of Applied Mathematics and Computer Science Ghent University

For a reciprocal relation Q on a set of alternatives A, two transitivity frameworks which generalize both T-transitivity and stochastic transitivity are discussed: the framework of cycle-transitivity, introduced by the present authors [6] and which is based upon the ordering of the numbers Q(a,b), Q(b,c) and Q(c,a) for all (a,b,c)∈A3, and the framework of FG-transitivity, introduced by Swital-ski [21] as an immediate generalization of stochastic transitivity. The rules that enable to express FG-transitivity in the form of cycle-transitivity and cycle-transitivity in the form of FG-transitivity, illustrate that for reciprocal relations the concept of cycle-transitivity provides a framework that can cover more types of transitivity than does the concept of FG-transitivity.

关键词： Copulas, cycle-transitivity, FG-transitivity, isostochastic transitivity, reciprocal relations, t-norms, T-transitivity, stochastic transitivity.

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Mass action realizations of reaction kinetic system models on various time scales

Mass action realizations of reaction kinetic system models o...

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作者： Hangos, K.M. Szederkényi, G. Process Control Research Group Computer and Automation Reseach Institute Kende u. 13-17 Budapest H-1111 Hungary Department of Electrical Engineering and Information Systems University of Pannonia Egyetem u. 10 Veszprém Hungary

Complex chemical reaction networks often exhibit different dynamic behaviour on different time scales. A combined approach is proposed in this work for determining physically meaningful mass action realizations of complex chemical reaction networks that describe its dynamic behaviour on different time scales. This is achieved by appropriately reducing the detailed overall mass action kinetic scheme using quasi steady state assumptions fit to the particular time scale, and then searching for an optimal realization using mixed integer linear programing. Furthermore, the relationship between the properties (reversibility, deficiency, stability) of the obtained realizations of the same system on different time scales are also investigated and related to the same properties of the detailed overall model. It is shown that the reduced models obtained by quasi steady state assumptions may show exotic nonlinear behaviour, such as oscillations, when the original detailed is globally asymptotically stable. The proposed methods are illustrated by using a simple Michaelis-Menten type reaction kinetic example. The simplified versions of the well known Brusselator model have also been investigated and presented as a case study. © Published under licence by IOP Publishing Ltd.

关键词： Reaction kinetics

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Distributed modular computer-integrated surgical robotic systems: Architecture for intelligent object distribution 3rd

Distributed modular computer-integrated surgical robotic sys...

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3rd International Conference on Medical Image Computing and computer-Assisted Intervention, MICCAI 2000

作者： Schorr, Oliver Hata, Nobuhiko Bzostek, Andrew Kumar, Rajesh Burghart, Catherina Taylor, Russel H. Kikinis, Ron Surgical Planning Laboratory Brigham and Women’s Hospital and Harvard Medical School BostonMA United States Institute for Process Control and Robotics University of Karlsruhe Germany Department of Computer Science Johns Hopkins University BaltimoreMD United States

ISBN: (纸本)3540411895

This paper presents intelligent object distribution architecture to maximize the performance and intelligence of a distributed surgical robotics system and its preliminary implementation in an MR-guided surgical robot system in an open-configuration MR! scanner. The method enables networked integration of a robot control server and multiple clients with minimum engineering overhead but maximum flexibility and performance. The clients in this study include an intraoperative imager, high-performance image processing computers), and surgical navigation host. The first contribution of the paper is to propose the use of object distribution by common object request broker architecture (CORBA), in which a robot control object on the robot control server can be remotely but transparently invoked from the clients regardless of their hardware, operating systems, or programming language. Second, we propose a technique to achieve additional flexibility by reporting the robot configuration information, i.e. geometry and kinematics of the robot, to the clients upon connection. Third, we ensure protection against an unauthorized entity by introducing a security control host that authorized the clients’ access to the robot server. In a prototype implementation of an MR-guided surgical robot system, the robot was controlled by surgical navigation software (the 3D Slicer) on a UNIX client by invoking the distributed control object on a robot control server on a PC. The method was evaluated in performance studies;and the result indicated 3.6 milliseconds for retrieving positions of the robot stages and 25.5 milliseconds to send a frame-based motion command, which are satisfactory for surgical robot control. In conclusion, the proposed method shows the potential usefulness of flexibly integrating the legacy software to a surgical robot system with minimum engineering overhead, thereby achieving highly complex and intelligent tasks in robot-assisted surgery. © Springer-Verlag Berlin Hei

关键词： Robotic surgery

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