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CHISA 2006 - 17th International Congress of Chemical and process engineering

作者： Vasickaninova, A. Bakosova, M. Puna, D. Department of Information Engineering and Process Control Institute of Information Engineering Automation and Mathematics Slovak University of Technology Radlinského 9 81237 Bratislava Slovakia

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ISBN: (纸本)8086059456

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Robust control of a chemical reactor using static output feedback

Robust control of a chemical reactor using static output fee...

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CHISA 2006 - 17th International Congress of Chemical and process engineering

作者： Bakošová, Monika Puna, Dalibor Závacká, Jana Department of Information Engineering and Process Control Institute of Information Engineering Automation and Mathematics Slovak University of Technology in Bratislava Radlinského 9 812 37 Bratislava Slovakia

ISBN: (纸本)8086059456

The paper presents an application of the robust static output feedback control (RSOFC) to an exothermic continuous-time stirred tank reactor (CSTR). The CSTR is an uncertain system, which operates in an unstable steady state. Robust controller design uses a linearized model of the CSTR. Necessary and sufficient conditions for stabilization of linear continuous-time uncertain polytopic systems via static output feedback are given. The problem of the RSOFC design is converted to solution of linear matrix inequalities (LMIs) and a computationally simple LMI based non-iterative algorithm is used. The design procedure guarantees with sufficient conditions the robust quadratic stability and guaranteed cost.

关键词： Robust control

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Individualised approaches in control education courses with large number of students

Individualised approaches in control education courses with ...

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作者： Fikar, M. Valo, R. Čirka, L'. Bakǒová, M. Huba, M. Department of Information Engineering and Process Control Faculty of Chemical and Food Technology STU Radlinského 9 812 37 Bratislava Slovakia Department of Automation and Control Faculty of Electrical Engineering and Information Technology STU Ilkovičova 3 812 19 Bratislava Slovakia

ISBN: (纸本)9783902661074

The aim of this paper is to give an overview about some ideas that have been introduced in past few years to the course Automatic control Fundamentals at FCFT STU. These involve heavy use of information technologies and reduction of repetitive pedagogic work using e-learning techniques for the course with a large number of students. The paper discusses reasons for this change as well as concrete technologies in question. Copyright © 2006 IFAC.

关键词： E-learning

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State-of-the-Art 3D Graphics for Embedded Systems

State-of-the-Art 3D Graphics for Embedded Systems

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IEEE International Caracas Conference on Devices, Circuits and Systems

作者： Reinhard Moller Automation and Process Control Engineering Department of Electrical Information Media Engineering University of Wuppertal Wuppertal Germany

The early days of 3D graphics computing were marked by extremely expensive and highly sophisticated hardware and software. Terms like ubiquitous computing and 3D on handhelds were unthinkable. But the development of obliging common standards like OpenGL, for example, together with rapidly improving graphics technology turned the coin, and now everybody demands for high-performance user interfaces on his everyday-computing environment. Game development industry focuses on mobile technology. Automotive engineering introduces multimodal interfaces and entertainment systems for next generation cars. Although all industrial sectors ask for high performance graphics, they often focus on different aspects due to the still existing limitations of their graphics devices. This leads to a demand to revise and also optimize the graphics standards in order to make them suitable for special embedded and small-scale devices. This paper presents the state of development of OpenGL-ES, a 3D-standard for embedded graphics, its difference to regular OpenGL and its benefit for small-footprint interactive systems. Special aspects of safety-critical devices in avionics and military applications are discussed. Actual applications and research are referenced

关键词： Graphics Embedded system Pervasive computing Hardware Ubiquitous computing Standards development User interfaces Toy industry Automotive engineering Interactive systems

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DYNAMIC ANALYSIS AND control OF CHEMICAL AND BIOCHEMICAL REACTION NETWORKS

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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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INDIVIDUALISED APPROACHES IN control EDUCATION COURSES WITH LARGE NUMBER OF STUDENTS

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IFAC Proceedings Volumes 2006年第6期39卷 529-534页

作者： M. Fikar R. Valo Čirka M. Bakoŝová M. Huba Department of Information Engineering and Process Control Faculty of Chemical and Food Technology STU Radlinského 9 812 37 Bratislava fax : +421 2 52496469 Department of Automation and Control Faculty of Electrical Engineering and Information Technology STU IlkoviČova 3 812 19 Bratislava

关键词： control engineering Information technologies E-learning XML

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control of a distillation column: A decentralized approach

Control of a distillation column: A decentralized approach

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IEEE International Conference on Computer-Aided Design

作者： Iman Makaremi Batool Labibi Advanced Automation and Digital Control Laboratory Control Department Electrical Engineering Faculty K.N. Toosi University of Technology Tehran Iran Process Control Laboratory Control Department Electrical Engineering Faculty K.N. Toosi University of Technology Tehran Iran

This paper presents a decentralized controller for a binary distillation column. The interactions between subsystems are considered as uncertainty. Then appropriate local H infin problems are defined such that by solving them and applying the designed controller to the system, closed-loop stability and diagonal dominance are guaranteed

关键词： Distillation equipment control systems MIMO Distributed control Uncertainty Stability Digital control Automatic control Isolation technology process control

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Plant-wide (BSM2) evaluation of reject water treatment with a SHARON-anommox process

Plant-wide (BSM2) evaluation of reject water treatment with ...

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作者： Volcke, Eveline I.P. Gernaey, K.V. Vrecko, Darko Jeppsson, Ulf Van Loosdrecht, M.C.M. Vanrolleghem, Peter A. BIOMATH Department of Applied Mathematics Biometrics and Process Control Ghent University Coupure Links 653 B-9000 Gent Belgium Department of Industrial Electrical Engineering and Automation Lund University PO Box 118 SE-22100 Lund Sweden Department of Chemical Engineering Technical University of Denmark Building 229 DK-2800 Kgs. Lyngby Denmark Department of Systems and Control Jožef Stefan Institute Jamova 39 SI-1000 Ljubljana Slovenia Department of Biochemical Engineering Delft University of Technology Julianalaan 67 NL-2628 BC Delft Netherlands ModelEAU Département de Génie Civil Université Laval Pavillon Pouliot Québec QC G1K 7P4 Canada

ISBN: (纸本)1843395835

In wastewater treatment plants (WWTPs) equipped with sludge digestion and dewatering systems, the reject water originating from these facilities contributes significantly to the nitrogen load of the activated sludge tanks, to which it is typically recycled. In this paper, the impact of reject water streams on the performance of a WWTP is assessed in a simulation study, using the Benchmark Simulation Model no. 2 (BSM2), that includes the processes describing sludge treatment and in this way allows for plant-wide evaluation. Comparison of performance of a WWTP without reject water with a WWTP where reject water is recycled to the primary clarifier, i.e. the BSM2 plant, shows that the ammonium load of the influent to the primary clarifier is 28% higher in the case of reject water recycling. This results in violation of the effluent total nitrogen limit. In order to relieve the main wastewater treatment plant, reject water treatment with a combined SHARON-Anammox process seems a promising option. The simulation results indicate that significant improvements of the effluent quality of the main wastewater treatment plant can be realized. An economic evaluation of the different scenarios is performed using an Operating Cost Index (OCI). © IWA Publishing 2006.

关键词： Wastewater treatment

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Comparison of linear and non-linear PLS methods for soft-sensing of an SBR for nutrient removal

Comparison of linear and non-linear PLS methods for soft-sen...

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3rd Biennial Meeting of the International Environmental Modelling and Software Society: Summit on Environmental Modelling and Software, iEMSs 2006

作者： Villez, K. Lee, D.S. Rosen, C. Vanrolleghem, P.A. BIOMATH Department of Applied Mathematics Biometrics and Process Control Ghent Univeristy Coupure Links 653 B-9000 Gent Belgium Department of Environmental Engineering Kyungpook National University Sankyuk-dong Buk-gu Daegu 702-701 Korea Republic of IEA: Department of Industrial Electrical Engineering and Automation Lund University LTH SE-221 00 Lund Sweden ModelEAU: Département de Génie Civil Pavillon Pouliot Université Laval Québec QC G1K 7P4 Canada

ISBN: (纸本)1424308526

Despite of promising results in research, advanced control strategies fail to gain trust in wastewater treatment practice. Due to the sensitivity of the biological processes to disturbances, operators are often unable to find the causes of faults due to the lack of effective real-time on-line monitoring. Strategies for on-line monitoring are therefore essential to enhance biological process control. Therefore, a suitable multivariate soft-sensor is desired for fault detection and control for a pilot-scale sequencing batch reactor (SBR) system to allow effluent quality to be estimated well before off-line analysis is finished. For this purpose, several multivariate methods are available, including (linear) partial least squares (PLS), Neural Net PLS (NNPLS) and Kernel PLS (KPLS). While non-linear extensions of PLS such as NNPLS require fitting of non-linear functions, KPLS does not. KPLS is based on a non-linear transformation of the process data, followed by the fitting of a linear PLS model between the transformed inputs and outputs. PLS, NNPLS and KPLS were compared regarding their ability to predict effluent quality data and their computational requirements. While (linear) PLS and NNPLS lead to acceptable prediction, KPLS results in poor model performance. Moreover, the computational requirement of KPLS were large compared to PLS and NNPLS. When comparing PLS and NNPLS to each other, it was found that NNPLS leads to the best possible prediction given the experimental data set, while the extra computational requirements are minimal.

关键词： Neural networks

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Method of surface EMG pattern recognition based on AR parameter model and clustering analysis

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Jiliang Xuebao/Acta Metrologica Sinica 2006年第3期27卷 286-289页

作者： Cui, Jian-Guo Wang, Xu Li, Zhong-Hai Tian, Feng Key Laboratory of Process Industry Automation of Ministry of Education Northeastern University Shenyang 110004 China Department of Automation Control Shenyang Institute of Aeronautical Engineering Shenyang 110034 China

Surface electromyography (SEMG) is a bio-electrical manifestation related to neuromuscular activation. Electromyography pattern recognition plays an important role in SEMG application. A new SEMG pattern recognition method based on AR parameter model and clustering analysis is proposed. Four channel SEMG signals from corresponding muscles (palmaris longus, brachioradialis, flexor carpi ulnaris, biceps brachii) are picked up and analyzed with AR model parameter. Using AR model parameters as signal characteristics, an eigenvector is composed and inputted to the Mahalanobis distance classifier to identify different movement patterns. Eight movement patterns (hand grasps, hand extension, wrist circumrotates entad, wrist circumrotates forth, wrist bends, wrist spreads, forearm circumrotates entad, forearm circumrotates forth) are successfully identified. Experiments show that the proposed method performs very well and the recognition result is robust. It is believed that this method can be straightforwardly expanded to other nonstationary bioelectric signals pattern recognition study.

关键词： Autoregressive (AR) parameter model Clustering analysis Metrology Pattern recognition Surface electromyography

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