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2010 International Symposium on Power Electronics, Electrical Drives, Automation and Motion, SPEEDAM 2010

作者： Gorbe, Peter Magyar, Attila Hangos, Katalin M. Department of Electrical Engineering and Information Systems University of Pannonia 8200 Veszprém Hungary Process Control Research Group Computer and Automation Research Institute 1518 Budapest Hungary

ISBN: (纸本)9781424449873

A control method for small domestic power plants using renewable energy is described in this paper. This method is not only capable of optimizing the working point of the plant but also implements active power factor correction and lowers the extant harmonic distortion in the line. The novel element in the proposed complex controller structure is the upper harmonic controller that minimizes the amplitudes of the 3rd, 5th 7th, 9th, and the 11th upper harmonic component in the output voltage. The proposed controller has been investigated by simulation in Matlab environment, and as a result, substantial improvement of the output voltage and current waveform could be achieved. Robustness of the method against nonlinear loads has also been tested. 0 © 2010 IEEE.

关键词： Solar power generation

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Scheduling with resource allocation and past-sequence-dependent setup times including maintenance

Scheduling with resource allocation and past-sequence-depend...

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IEEE International Conference on Networking, Sensing and control

作者： Zhanguo Zhu Feng Chu Linyan Sun Ming Liu School of Management Xi''an Jiaotong University China Institut Charles Delaunay FRE CNRS 2848 Laboratoire doptimisation des systèmes industriels (LOSI) Université de Technologie de Troyes Troyes France Laboratoire dinformatique biologie intégrative et systémes complexes (IBISC) FRE CNRS 3190 Université d''Evry Val d''Essonne Evry France School of Management State Key Laboratory for Mechanical Manufacturing Systems Engineering The Key Laboratory of the Ministry of Education for process control and Efficiency Engineering Xi''an Jiaotong University China School of Economics & Management University of Tongji Shanghai China

In this work, scheduling problems with resource allocation and past-sequence-dependent (p-s-d) setup times are considered. Under these settings, the actual job processing times are dependent on the amount of resource allocated and the setup times are proportionate to the length of the already processed jobs. The objective function is a combination of the total completion time and the total resource consumption. In addition, the machine may need maintenance to improve its production efficiency, so the maintenance is also integrated. The optimal job sequence, the optimal amount of resource allocated to each job, and the optimal maintenance position are determined jointly. It is shown that the problem under study is polynomial time solvable.

关键词： Job shop scheduling Single machine scheduling Maintenance engineering Resource management processor scheduling Equations Europe

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The roll of system & control engineer of steel plant and the recent technology trend

Kami Pa Gikyoshi/Japan Tappi Journal

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Kami Pa Gikyoshi/Japan Tappi Journal 2010年第3期64卷 13-19页

作者： Soejima, Hisanobu Systems and Control Engineering Div. Environment and Process Technology Center Nippon Steel Corporation Japan

The process of steel plant requires the high reliability, which endures the 24 hours continuous operation, high responsibility and high accuracy, which realizes the manufacturing at several micrometers accuracy in a high speed, high productivity and high efficiency, which realizes the reduction of labor and energy saving. In this report, I give an outline about the technique trend of the characteristics such as a training system, software productivity improvement measure and the operation support system realizing the organization of the system and control engineer in the steel industry and a role/personnel training and technique tradition on the basis of the above-mentioned trend.

关键词： Productivity

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Optimal control over unreliable networks with uncertain loss rates

Optimal control over unreliable networks with uncertain loss...

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作者： Kögel, Markus J. Blind, Rainer Allgöwer, Frank Institute for Systems Theory and Automatic Control University of Stuttgart Stuttgart Germany Laboratory for Systems Theory and Automatic Control Institute for Automation Engineering Otto-von-Guericke University Magdeburg Magdeburg Germany Design and Optimization in Chemical and Biochemical Process Engineering International Max Planck Research School for Analysis Magdeburg Germany

ISBN: (纸本)9781424474264

In this work, we consider an optimal control problem for Networked control systems (NCS), where the loop is closed via an unreliable network. In order to inform the controller about the fates of the control packets, the actuator sends acknowledgements to the controller. In this work, different types of acknowledgements are considered. Since all packets are send over a network, we consequently assume, that all packets can get lost, i.e. the measurement packets, the control packets as well as the acknowledgement packets. The loss of these packets is modeled by independent and identically distributed (iid) Bernoulli processes. Finally, we assume that the parameters of these loss processes are not known exactly. Using this setup, we derive bounds for the uncertainty in the loss rates. Moreover, we present an algorithm to design a sub-optimal controller which can tolerate a given amount of network uncertainties. © 2010 AACC.

关键词： Networked control systems

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Dynamic modeling and model analysis of a large industrial synchronous generator

Dynamic modeling and model analysis of a large industrial sy...

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作者： Fodor, Attila Magyar, Attila Hangos, Katalin M. Department of Electrical Engineering and Information Systems University of Pannonia 8200 Veszprém Hungary Process Control Research Group Computer and Automation Research Institute HAS Budapest Hungary

ISBN: (纸本)9788070438657

A simple dynamic model of an industrial size synchronous generator operating in a nuclear power plant is developed in this paper based on first engineering principles. The constructed state-space model consists of a nonlinear state equation and a bi-linear output equation. It has been shown that the model is locally asymptotically stable with parameters obtained from the literature for a similar generator. The effect of load disturbances on the partially controlled generator has been analyzed by simulation using a traditional PI controller. It has been found that the controlled system is stable and can follow the set-point changes in the effective power well. The disturbance rejection of the controller is also satisfactory.

关键词： Disturbance rejection

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

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Journal of Physics: Conference Series 2011年第1期268卷

作者： K M Hangos G Szederkényi Process Control Research Group Computer and Automation Reseach Institute Kende u. 13-17 H-1111 Budapest 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.

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On the analysis of self-adaptive evolution strategies on elliptic model: First results 10

On the analysis of self-adaptive evolution strategies on ell...

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12th Annual Genetic and Evolutionary Computation Conference, GECCO-2010

作者： Melkozerov, Alexander Beyer, Hans-Georg Department of Television and Control Tomsk State University of Control Systems and Radioelectronics Lenin ave. 40 634050 Tomsk Russia Research Center Process and Product Engineering Department of Computer Science Vorarlberg University of Applied Sciences Hochschulstr. 1 A-6850 Dornbirn Austria

ISBN: (纸本)9781450300728

In this paper, first results on the analysis of self-adaptive evolution strategies (ES) with intermediate multirecombination on the elliptic model are presented. Equations describing the ES behavior on the ellipsoid will be derived using a deterministic approach and experimentally verified. A relationship between newly obtained formulae for the elliptic model and previous theoretical results will be discussed. Copyright 2010 ACM.

关键词： Evolutionary algorithms

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A Comparison of Arithmetic Operations for Dynamic process Optimization Approach

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Chinese Journal of Chemical engineering 2010年第1期18卷 80-85页

作者：洪伟荣谭鹏程王树青 Pu Li Institute of Process Equipment Zhejiang University Hangzhou 310027 China Institute of Cyber-System and Control State Key Lab of Control Technology Zhejiang University Hangzhou310027 China Institute of Automation and Systems Engineering Ilmenau University of Technology Ilmenau 98684 Germany

A comparison of arithmetic operations of two dynamic process optimization approaches called quasi-sequential approach and reduced Sequential Quadratic Programming(rSQP)simultaneous approach with respect to equality constrained optimization problems is *** the detail comparison of arithmetic operations,it is concluded that the average iteration number within differential algebraic equations(DAEs)integration of quasi-sequential approach could be regarded as a *** formula is given to calculate the threshold value of average iteration *** the average iteration number is less than the threshold value,quasi-sequential approach takes advantage of rSQP simultaneous approach which is more suitable *** optimal control problems are given to demonstrate the usage of threshold *** optimal control problems whose objective is to stay near desired operating point,the iteration number is usually ***,quasi-sequential approach seems more suitable for such problems.

关键词： dynamic optimization arithmetic operation comparison quasi-sequential approach simultaneous approach

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A GA-Optimised Ensemble Neural Network Model For Charpy Impact Energy Predictions

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IFAC Proceedings Volumes 2010年第9期43卷 62-67页

作者： Mahdi Mahfouf Yong Yao Yang Institute for Microstructural and Mechanical Process Engineering: The University of Sheffield Department of Automatic Control and Systems Engineering The University of Sheffield Mappin Street Sheffield S1 3JD UK

An ensemble modelling strategy, which is based on the genetic algorithm neural network (GA-NN) optimisation, is developed in this paper. A diversity index, defined by the dissimilarity between the current neural network (NN) and the set of existing NNs, is first introduced to facilitate the qualification of the current NN for being included in the ensemble network. A fitness-weighted assemble scheme is then proposed to form the GA-NN ensemble model. The unique advantage of this ensemble modelling scheme is its high efficiency, thanks to the full exploitation of information generated during the GA-NN optimisation. Preliminary results obtained for the prediction of the Charpy impact energy of heat-treated steel are promising, with the model performance being significantly improved as compared to previous modelling results.

关键词： Neural networks Genetic algorithms ensemble modelling Charpy impact energy Mechanical properties

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Service-orientation on behalf of self-configuration for the automation environment

Service-orientation on behalf of self-configuration for the ...

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Annual Conference of Industrial Electronics Society

作者： Henning Mersch Ulrich Epple Christian Kleegrewe Chair for Process Control Engineering RWTH Aachen University Aachen Germany Corporate Technology Intelligent Autonomous Systems Siemens AG Munich Germany

On current automation systems a device failure might lead to significant down times of a plant as well as man power to replace and - more important - to setup the replacement device. Since the physical replacement can't be circumvented, the setup procedure could be automatized as much as possible. This paper shows an approach based on a new automation system designed as a service-oriented architecture (SOA). Advantages of this service-orientation for the automation environment are described in detail. The presented choreography of services yields to a flexible, dynamic and scalable system like it is well known for today's distributed, information technology systems - e.g. grid computing. This approach is applied to the self-configuration scenario as a demonstration of the benefits and chances, which could be achieved by modeling automation systems based on the SOA principle. A prototype realizes the presented service-choreography using real-world's automation components.

关键词： Automation Service oriented architecture Prototypes Sensors Valves Memory

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