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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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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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Coupling Dynamic Model of Chatter for Cold Rolling

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Journal of Iron and Steel research International 2010年第12期17卷 30-34页

作者： YANG Xu TONG Chao-nan YUE Guang-feng MENG Jian-ji School of Information Engineering University of Science and Technology Beijing Beijing 100083 China Key Laboratory of Advanced Control of Iron and Steel Process (Ministry of Education) University of Science and Technology- Beijing Beijing 100083 China Central Research Institute of Building and Construction Co Ltd MCC Group Beijing 100088 China

In order to build high accuracy integral dynamic models of cold rolling mill system, by analyzing the vibration process of cold rolling, the dynamic model of 4-h mill, including the rolling process model, the mill roll stand structure model and the hydraulic servo system model is built. These three models are coupled and linearized, then the multiple input and multiple output （MIMO） linear transfer function model of single stand 4-h cold mill system is obtained. The model with the proposed data proves its validity, meanwhile the effects of different working conditions on the stability of cold rolling mill system have been discussed. Simulation resulsts show that the model accords with former models and has its own advancement. It contributes to the further study and supression of coupling vibraiton.

关键词： cold rolling chatter dynamic modeling coupling simulation

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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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Identifiability of a Hodgkin-Huxley type ion channel under voltage step measurement conditions

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IFAC Proceedings Volumes 2010年第5期43卷 332-337页

作者： D. Csercsik 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

In this paper, we analyze the identifiability properties of a Hodgkin-Huxley (HH) type voltage dependent ion channel model under voltage clamp circumstances. The elimination of the differential variables is performed, and the identifiability of various parameters is analyzed using the differential algebra approach and the algorithm based on the Taylor series expansion of the output. It is shown that the model is structurally non-identifiable using certain commonly applied parametrizations, and hidden dependences between physical parameters are unravelled. Using the results of the identifiability analysis, physically meaningful examples are shown when the model parameters are different but the system outputs are identical.

关键词： Modeling and Identification control Applications in Biological processes

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Computing reaction kinetic realizations of positive nonlinear systems using mixed integer programming

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IFAC Proceedings Volumes 2010年第14期43卷 981-986页

作者： Gábor Szederkényi Process Control Research Group Systems and Control Laboratory Computer and Automation Research Institute (MTA-SZTAKI) Hungarian Academy of Sciences P.O. Box 63 H-1518 Budapest Hungary

The reaction kinetic realizations of nonnegative polynomial systems are studied in this paper. It is briefly reviewed that a wide class of positive systems can be written in or simply transformed to kinetic form. Based on the structure of kinetic realizations, valuable information can be obtained about the dynamical properties of the investigated systems using the results of chemical reaction network theory (CRNT). Since the realizations of a given system can have many different structures, mixed integer linear programming is used to generate the ones with required properties (i.e. the minimal/maximal number of reactions or complexes).

关键词： nonlinear systems positive systems chemical reaction networks mixed integer optimization

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THD reduction with grid synchronized inverter’s power injection of renewable sources

THD reduction with grid synchronized inverter’s power injec...

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International Symposium on Power Electronics, Electrical Drives, automation and Motion, SPEEDAM

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

关键词： Power factor correction Costs Power generation Voltage control Harmonic distortion Robustness Nonlinear distortion Solar power generation Power supplies Inverters

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Application of GA based neuro - fuzzy automatic generation for teleoperation systems

Application of GA based neuro - fuzzy automatic generation f...

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International Conference on Digital Content, Multimedia Technology and its Applications (IDC)

作者： Sara Manifar Mahdi Aliyari Shoorhedeli Department of Mechatronics Engineering Islamic Azad University Science and Research Tehran Iran Department of Mechatronics Engineering and Advanced Process Automation and Control (APAC) Research Group K.N. Toosi University of Technology Tehran Iran

This paper discusses the design of a controller for teleoperation systems which operate in contact with unknown environments. For this purpose, the controller in the slave part is designed to use a classical controller and a neuro-fuzzy controller. To have a haptic teleoperation, the force feedback from the contact point to the master side is needed. In this study virtual force is fed back to the master instead of the measured contact force and the feedback force is the position error i.e. the difference between the position of master and slave robots. Primary, classical controller was designed for this object, the gains of this controller is obtained by standard genetic algorithm (GA), in offline and optimization method at nominal operating point. In master-slave robot with classical controller, when, robot works in soft or hard environment and the operating point was changed, the obtained controller are not suitable. For this reason, online neuro - fuzzy gain scheduling controller are designed for this system to tune the controller's parameters. The NF trained in offline mode based on GA and in online application tuned the controller based on monitoring of operating point of system. This method makes the system robust to uncertainties such as modeling errors, parameter mismatches and disturbances. The simulation results show the ability of proposed method in compare of other controllers such as Kalman filter.

关键词： Force Equations Monitoring Iron Mathematical model

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应用小波的PV振荡周期多分辨率检测

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应用科学学报 2010年第1期28卷 60-64页

作者：徐占洋 Charles ZHAN 张顺颐南京邮电大学江苏省信息网络研究中心南京信息工程大学计算机与软件学院 Advanced Process Control Research and Development Group Honeywell Process SolutionsPhoenixAZ85027USA

该文提出了一种新的使用小波技术检测PV数据信号振荡周期的方法.首先使用小波技术对PV数据进行降噪;然后在不同分辨率上,应用冗余二进制离散小波变换(DDWT)来分解PV振荡信号,并检测该信号的小波系数极值,重构PV信号,避免降噪后的PV信号... 详细信息

该文提出了一种新的使用小波技术检测PV数据信号振荡周期的方法.首先使用小波技术对PV数据进行降噪;然后在不同分辨率上,应用冗余二进制离散小波变换(DDWT)来分解PV振荡信号,并检测该信号的小波系数极值,重构PV信号,避免降噪后的PV信号失真;最后基于本文提出的新算法,计算获得PV振荡信号的周期.

关键词：周期检测 PV振荡信号二进制离散小波变换小波系数极值

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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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International Conference on Applied Electronics, AE

作者： Attila Fodor Attila Magyar Katalin M. Hangos Department of Electrical Engineering and Information Systems University of Pannonia Veszprem Hungary Process Control Research Group Computer and Automation Research Institute Hungarian Academy of Sciences (ATOMKI) Budapest Hungary

关键词： Mathematical model Equations Synchronous generators Torque Windings Rotors

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