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International Carpathian Control Conference (ICCC)

作者： L'ubomír Dorčák Emmanuel Gonzalez Ján Terpák Ivo Petráš Juraj Valsa Monika Žecová Institute of Control and Informatization of Production Processes Faculty BERG Technical University of Košice Kosice Slovakia Center for Automation Research College of Computer Studies De La Salle University Manila Philippines Faculty of Electrical Engineering and Computer Science Brno University of Technology Brno Czech Republic

Real objects in general are fractional-order (FO) systems, although in some types of systems the order is very close to integer order (IO). Since major advances have been made in the theory and practice of the identification of FO controlled objects and in the design of FO controllers, it is possible to consider also the real order of the dynamical systems and consider more quality criterion while designing the FO controllers with more degrees of freedom compared to their IO counterparts. In this paper, we present an application of the retuning method to design and apply new FO controller for the existing laboratory feedback control system with no modifications in the internal architecture of the original feedback control system. Along with the mathematical description, presented are also simulation results.

关键词： Closed loop systems Feedback control Mathematical model Laboratories Educational institutions PD control

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Cascade PID control of some processes with distributed parameters through the (M pdx ) method with approximating solutions

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IFAC Proceedings Volumes 2013年第6期46卷 19-25页

作者： T. Coloşi M. Abrudean M.L. Ungureşan V. Mureşan Department of Automation Technical University of Cluj-Napoca Faculty of Automation and Computer Science 26-28 Gh. Baritiu Street 400027 Cluj-Napoca Romania Phone: +40-264-401240 +40-744-420906 Fax: +40-264-599893 Department of Physics and Chemistry Technical University of Cluj-Napoca Faculty of Materials Science and Engineering 103-105 Muncii Street 400641 Cluj-Napoca Romania Phone: +40-264-401627 Fax: +40-264-415054

Continuing the paper (2013) the analogical modeling and the numerical simulation of a cascade PID control diagram from Fig. 1 is presented, containing two distributed parameters processes, each one modeled through an equation with partial derivatives of second order with two independent variables. Through the numerical integration, the method of the Matrix of Partial Derivatives of the State Vector (M pdx ) is used too, associated with approximating solutions. The unitary and systemized character of this method is highlighted, considered known from the previous papers. (2009, 2011, 2013). Like in the case of paper [1], a program of numerical simulation for the entire PID cascade control scheme was elaborated, resulting a more complete phenomenological interpretation of the obtained results and performances.

关键词： equations with partial derivatives ordinary differential equations state vector initial conditions approximating solutions Taylor series cascade PID control scheme

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Displacement prediction of landslide based on PSOGSA-ELM with mixed kernel

Displacement prediction of landslide based on PSOGSA-ELM wit...

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International Workshop on Advanced Computational Intelligence (IWACI)

作者： Cheng Lian Zhigang Zeng Wei Yao Huiming Tang School of Automation Key Laboratory of Image Processing and Intelligent Control of Education Ministry China School of Computer Science South-Central University for Nationalities Wuhan China Faculty of Engineering China University of Geosciences Wuhan China

The prediction of landslide displacement is essential for carrying out to improve the disaster warning system and reduce casualties and property losses. This study applies a novel neural network technique, extreme learning machine (ELM) with kernel function, to landslide displacement prediction problem. However, the generalization performance of ELM with kernel function depends closely on the kernel types and the kernel parameters. In this paper, we use a convex combination of Gaussian kernel function and polynomial kernel function in ELM, which may use these two types of kernel functions' advantages. In order to avoid blindness and inaccuracy in parameter selection, a novel hybrid optimization algorithm based on the combination of Particle Swarm Optimization (PSO) and Gravitational Search Algorithm (GSA) is used to optimize the regularization parameter C, the Gaussian kernel parameter γ, the polynomial kernel parameter q and the mixing weight coefficient η. The performance of our model is verified through two case studies in Baishuihe landslide and Yuhuangge landslide.

关键词： Kernel Terrain factors Optimization Hazards Reservoirs Training Support vector machines

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Intelligent Haptic Robotic Glove for patients diagnosed with cerebrovascular accidents

Intelligent Haptic Robotic Glove for patients diagnosed with...

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International Conference on System Theory, Control, and Computing (ICSTCC)

作者： Nirvana Popescu Dorin Popescu Marian Poboroniuc Cristian Dinu Popescu Computer Science Department University Politehnica of Bucharest Bucharest Romania Faculty of Automation Computers and Electronics University of Craiova Craiova Romania Faculty of Electrical Engineering GH. ASACHI Technical University of Iasi Iaşi Romania Rehabilitation Clinic Hospital of Iasi Iaşi Romania

This paper is based on a research project regarding the design and development of an Intelligent Haptic Robot-Glove (IHRG) for the rehabilitation of the patients that have a diagnosis of a cerebrovascular accident. The IHRG is an exoskeleton that supports the human hand and hand activities by using a control architecture for dexterous grasping and manipulation. This IHRG is a medical device that acts in parallel to a hand in order to compensate some lost function. A novel approach for the development of an exoskeleton assistive hand is considered, a “mechatronic approach” for the integration of the mechanical structure, the sensory, the actuation system and the virtual and control system.

关键词： Robots Thumb Exoskeletons computer architecture Sensors Medical treatment

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Complex Dynamical Behavior of a Two-Stage Colpitts Oscillator with Magnetically Coupled Inductors

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Journal of Chaos 2014年第1期2014卷

作者： V. Kamdoum Tamba H. B. Fotsin J. Kengne F. Kapche Tagne P. K. Talla Department of Physics Laboratory of Electronics and Signal Processing (LETS) Faculty of Science University of Dschang P.O. Box 67 Dschang *** Department of Telecommunication and Network Engineering IUT-Fotso Victor of Bandjoun University of Dschang P.O. Box 134 Bandjoun *** Department of Electrical Engineering Laboratory of Automation and Applied Computer (LAIA) IUT-Fotso Victor of Bandjoun University of Dschang P.O. Box 134 Bandjoun *** Department of Physics Laboratory of Mechanics and Modelling of Physical Systems (L2MPS) Faculty of Science University of Dschang P.O. Box 67 Dschang ***

A five-dimensional (5D) controlled two-stage Colpitts oscillator is introduced and analyzed. This new electronic oscillator is constructed by considering the well-known two-stage Colpitts oscillator with two further elements (coupled inductors and variable resistor). In contrast to current approaches based on piecewise linear (PWL) model, we propose a smooth mathematical model (with exponential nonlinearity) to investigate the dynamics of the oscillator. Several issues, such as the basic dynamical behaviour, bifurcation diagrams, Lyapunov exponents, and frequency spectra of the oscillator, are investigated theoretically and numerically by varying a single control resistor. It is found that the oscillator moves from the state of fixed point motion to chaos via the usual paths of period-doubling and interior crisis routes as the single control resistor is monitored. Furthermore, an experimental study of controlled Colpitts oscillator is carried out. An appropriate electronic circuit is proposed for the investigations of the complex dynamics behaviour of the system. A very good qualitative agreement is obtained between the theoretical/numerical and experimental results.

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Exponential stability of boundary controlled port Hamiltonian systems with dynamic feedback

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IFAC Proceedings Volumes 2013年第26期46卷 115-120页

作者： Hector Ramirez Hans Zwart Yann Le Gorrec Department of Automation and Micro-Mechatronic Systems FEMTO-ST UMR CNRS 6174 ENSMM 26 chemin de l'épitaphe F-25030 Besançon France University of Twente Faculty of Electrical Engineering Mathematics and Computer Science Department of Applied Mathematics P.O. Box 217 7500 AE Enschede The Netherlands

In this paper it is shown that an input strictly passive linear finite dimensional port-Hamiltonian controller exponentially stabilizes a large class of boundary control systems. This follows since the finite dimensional controller dissipates the energy flowing through the boundaries of the infinite dimensional system. The assumptions on the controller is that it is input strictly passive and that it is exponentially stable. The result is illustrated on the model of a boundary controlled DNA-manipulation process.

关键词： Boundary control systems infinite dimensional port Hamiltonian systems exponential stability passivity

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Personalized therapy selection by using multi-objective optimization

Personalized therapy selection by using multi-objective opti...

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IEEE 16th International Conference on Intelligent engineering Systems, INES 2012

作者： Karpics, Ivars Institute of Computer Control Automation and Computer Engineering Faculty of Computer Science and Information Technology Riga Technical University Riga Latvia

ISBN: (纸本)9781467326957

In the article a therapy selection method by using topological modelling and multi- objective optimization is presented. In a medicine practice a doctor by taking into the count patients' health state and laboratory results, tries to suggest a treatment strategy, which mostly is a drug therapy. To solve this task a decision support system has been developed and proposed. The system includes a mathematical model of three self connected diseases. Therapies are evaluated by five efficiency objectives. To find the optimal therapy, seven multi- objective methods are selected and used. Optimization methods form decision support module which is implemented in the medical computer system. To evaluate a performance of the system, test examples are analysed. Conclusion includes the summary and proposals of further research. © 2012 IEEE.

关键词： Multiobjective optimization

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Hydrogen sensing using gold nanoclusters supported on tungsten trioxide thin films

Hydrogen sensing using gold nanoclusters supported on tungst...

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作者： Ahmad, Muhammad Z. Golovko, Vladimir B. Adnan, Rohul H. Abu Bakar, Faridah Ruzicka, Jan-Yves Anderson, David P. Andersson, Gunther G. Wlodarski, Wojtek School of Electrical and Computer Engineering RMIT University Melbourne VIC 3001 Australia Mechanization and Automation Research Centre MARDI HQ 43400 Serdang Selangor Malaysia MacDiarmid Institute for Advanced Materials and Nanotechnology Department of Chemistry University of Canterbury Christchurch 8041 New Zealand Chemistry Department University of Malaya 50603 Kuala Lumpur Malaysia Faculty of Science Technology and Human Development University Tun Hussein Onn Malaysia 86400 Parit Raja Batu Pahat Johor Darul Takzim Malaysia Centre for NanoScale Science and Technology Flinders University Adelaide SA 5001 Australia

Controlled amounts of chemically synthesised gold (Au) nanoclusters were deposited onto tungsten trioxide (WO3) nanostructured thin films as sensors for hydrogen. The Au/WO3 thin films were characterised by XPS, XRD, SEM and TEM. Performance of Au/WO3 films was tested at operating temperatures varying from room temperature to 450 C. It was demonstrated that Au metal loading plays an important role in defining enhancement of the sensor response towards hydrogen. "Less is more" principle applies to the reported here sensors as materials made using lower concentration of Au nanoclusters demonstrated significantly better response. HRTEM images of the Au/WO3 thin films provide evidence that the more active sensors are enriched with smaller Au nanoparticles (≤5 nm). Fast response towards H2 within a wide range of industrially relevant concentrations, excellent baseline stability and signal reproducibility at optimized operating temperature demonstrate feasibility of this novel approach toward fabrication of sensors. © 2013, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

关键词： Tungsten compounds

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Analysis of the Geometrical Features of Photospheric Bright Points in the Quiet-Sun Region

Analysis of the Geometrical Features of Photospheric Bright ...

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第三十二届中国控制会议

作者： Lan Yu Linhua Deng Song Feng Department of Information Engineering Yunnan Land and Resources Vocation College Key Laboratory of Modern Astronomy and Astrophysics(Nanjing University) Ministry of Education National Astronomical Observatories/ Yunnan Astronomical Observatory Chinese Academy of Sciences Graduate University of Chinese Academy of Sciences Computer Technology Application Key Lab of Yunnan Province and Faculty of Information Engineering and Automation Kunming University of Science and Technology

ISBN: (纸本)9781479900305

The Solar Granulation is an ubiquitous structure in the quiet *** brighter features called "Photospheric Bright Points(PBPs)" are found within inter-granules in G-band images *** are the small-scale feature on the solar *** their characteristics may reveal the significant problems such as coronal hearting,local dynamo theory and the relation of magnetic *** the presented paper,we utilized Laplacian and morphological dilation(LMD) technique to detect and extract PBPs within inter-granular lanes.A data set has been taken with the Dutch Open Telescope(DOT) on July 2, *** was employed to analyze the geometrical feature of *** statistical distributions of PBPs were obtained by the proposed *** diameter distribution of PBPs is consistent with lognormal *** peak diameter occurs at about *** histogram of geometrical features is derived from the PBPs *** distribution of eccentricity indicates that approximately 50%PBPs have a near circular,the average eccentricity occurs at *** distribution accords with an Exponential fit.

关键词： Photospheric Bright Points Laplacian morphological dilation eccentricity Sun

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Tree branching reconstruction from unilateral point clouds

Tree branching reconstruction from unilateral point clouds

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6th International Conference on E-Learning and Games, Edutainment 2011

作者： Wang, Yinghui Chang, Xin Ning, Xiaojuan Zhang, Jiulong Shi, Zhenghao Zhao, Minghua Wang, Qiongfang Institute of Computer Science and Engineering Xi'an University of Technology Xi'an 710048 China Faculty of Automation and Information Engineering Xi'an University of Technology Xi'an 710048 China

ISBN: (纸本)9783642314384

Trees are ubiquitous in natural environment and realistic models of tree are also indispensable in computer graphics and virtual reality domains. However, their complexity in geometry and topology make it a great challenge for photo-realistic tree reconstruction. Since tree trunk is the preliminary structure of trees, its modeling is a critical step which plays an important role in tree modeling. Many existing methods focus on the overall resemblance of tree branches but omit the local geometry details. In this paper, we perform unilateral scanning of real-world trees and propose an approach that could reconstruct trees from incomplete point clouds. The core of our method contains four parts: local optimal segmentation of tree branch, skeletal point and lines extraction from unilateral branch, the cross-section construction of tree branch, and final tree branch surface generation. Experimental results demonstrate the effectiveness and robustness of our method which could keep realistic shape of trees. © 2012 Springer-Verlag.

关键词： Virtual reality

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