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International Conference on Computational Intelligence, Modelling and Simulation (CSSIM)

作者： Salihatun Md Salleh Osman Tokhi Department of Engineering Mechanics Faculty of Mechanical and Manufacturing Engineering Universiti Tun Hussein Onn Malaysia Batu Pahat Malaysia Department of Automatic Control and Systems Engineering Faculty of Engineering University of Sheffield UK

This article presents the active vibration control with bio-inspired algorithms model based system utilising genetic algorithm (GA), particle swarm intelligence (PSO) and artificial immune system (AIS). The parameter of the model is estimated and the transfer function of the active vibration controller is characterized implementing GA with real coded execution, PSO with spreading factor and AIS implemented AiNet type of algorithms. The comparisons of AVC based bio inspired algorithms are validated using time and frequency domain response, mean squares of error and correlation tests. The performances of the algorithm are assessed through determination of dominant vibration modes using spectral density of the response.

关键词： Computational modeling Computational intelligence

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Work in progress: MiceNet: Monitoring behaviour of laboratory mice with sensor networks

Work in progress: MiceNet: Monitoring behaviour of laborator...

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International Conference on Distributed Computing in Sensor systems (DCOSS)

作者： Grigore Stamatescu Kay Romer Ralf Ludwig Saleh M. Ibrahim Valentin Sgârciu Faculty of Automatic Control and Computers University Politehnica of Bucharest Bucharest Romania Institute of Computer Engineering University of Lübeck Lubeck Germany Department of Dermatology University of Lübeck Lubeck Germany

Medical research uses laboratory mice for experimental studies. Currently, symptoms are manually observed and recorded, resulting in noisy data - requiring many animals to obtain statistically significant results. We propose the use of a camera sensor network attached to mice cages as a low-cost solution for continuously monitoring mouse behavior and providing remote access to the data for scientists. The benefits of this approach are discussed along with challenges encountered in the initial phases of deployment. The proposed hardware and software architecture is described and early experimentation results are presented.

关键词： Mice Cameras Monitoring Laboratories Image color analysis

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Advanced Active Power Filter to improve power quality

Advanced Active Power Filter to improve power quality

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International Aegean Conference on Electrical Machines and Power Electronics, ACEMP

作者： Gelu Gurguiatu Ciprian Balanuţă Emil Roşu Toader Munteanu Mariana Dumitrescu Elena Raducan Faculty of Automatic Control Computers Electrical and Electronics Engineering Department Automation and Electrical Engineering Dunărea de Jos University of Galai Romania Faculty of Sciences Physics Department Duărea de Jos University of Galati Romania

This paper presents a three-phase Active Power Filter (APF) to improve grid power quality. Starting from indirect control strategy which was used only for three legs - three wires it is proposed in this paper to be used a bridge with three legs - four wire. The new control strategy it was named extended indirect control strategy. The extension consists in passing from the control of a three wire active power filter to the control of a four wire active power filter. The proposed active power filter can compensate the current harmonics and correct the power factor. Moreover, the proposed control strategy allows the line current at the point of common coupling (PCC) to be balanced and sinusoidal even when the load is unbalanced. Consequently the voltage at the PCC becomes balance. Simulation results show the validity of the proposed control strategy.

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Robust H∞ filtering for uncertain 2-D continuous systems, based on a polynomially parameter-dependent Lyapunov function

Robust H∞ filtering for uncertain 2-D continuous systems, b...

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International Workshop on Multidimensional (nD) systems

作者： Chakir El-Kasri Abdelaziz Hmamed Teresa Alvarez Fernando Tadeo LESSI Department of Physics Faculty of Sciences University of Dhar EI Mehraz Fes-Atlas Morocco Department of Systems Engineering and Automatic Control University of Valladolid Valladolid Spain

The problem of robust H ∞ filtering for uncertain two-dimensional (2-D) continuous systems described by the Roesser state-space model is investigated when the parameter uncertainties are polytopic. A sufficient linear matrix inequality (LMI) condition for the existence of a 2-D continuous filter such that, for all admissible uncertainties, the error system is asymptotically stable, and the H ∞ norm of the transfer function from the noise signal to the estimation error is below a prespecified level. A sequence of standard LMI conditions that ensure the existence of homogeneous polynomially parameter-dependent (HPPD) matrices of arbitrary degree, that are solutions to the parameter-dependent LMIs is provided in terms of the vertices of the polytope. The proposed method includes results in the quadratic framework and the linearly parameter-dependent framework as special cases. Finally, an example is provided to demonstrate the effectiveness and advantages of the proposed filter design methodology.

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Ship's roll stabilization by anti-roll active tanks

Ship's roll stabilization by anti-roll active tanks

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OCEANS - Europe

作者： M. Haro R. Ferreiro F.J. Velasco Faculty of Nautical Sciences University of Cádiz Cadiz Spain Department Industrial Engineering University of A Coruña Spain Department Electronic Technology Systems Engineering and Automatic Control University of Cantabria Spain

This paper examines the control of the heeling angle of a ship in still waters based on the utilisation of anti-heeling tanks operated by pressurized air. The proposed objective attempts to reduce the list angle to a null value during the loading process in a fast ferry ship. A nonlinear adaptive controller has been designed as a means of counteracting the parameter inaccuracies that are involved in the nonlinear model. These are the linear and quadratic damping coefficients and the size of the cargo that is being handled. The design is based on a relatively new methodology, the backstepping procedure. With the objective of reducing the number of sensors a model reference based nonlinear observer has been introduced. The controller thus designed provides a robust control system under parametric uncertainties and state variable errors. The designed control implies an improvement on the actual systems based on the PID control implemented under programmable logic controllers (PLCs).

关键词： Marine vehicles Damping Torque Backstepping Stability criteria Atmospheric modeling

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An interpolation approach for robust constrained output feedback

An interpolation approach for robust constrained output feed...

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IEEE Conference on Decision and control

作者： H.-N. Nguyen P.-O. Gutman S. Olaru M. Hovd SUPELEC Systems Sciences (E3S) - Automatic Control Dept. France Faculty of Civil and Environmental Engineering Technion - Israel Institute of Technology Department of Engineering Cybernetics Norwegian University of Science and Technology

ISBN: (纸本)9781612848006

In this paper, we consider the regulation problem for uncertain linear discrete time systems with bounded disturbance, bounded input and bounded output. Based on the input-output representation, an extended state space model is constructed via the delayed inputs and outputs of the systems and hence there is no need for any estimate of the unmeasured states. The control is obtained using an interpolation technique, which assures feasibility and a robustly asymptotically stable closed loop behavior.

关键词： Robustness Interpolation Ellipsoids Lyapunov methods Uncertainty Linear programming Minimization

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Constrained interpolation-based control for polytopic uncertain systems

Constrained interpolation-based control for polytopic uncert...

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IEEE Conference on Decision and control

作者： H.-N. Nguyen S. Olaru P.-O. Gutman M. Hovd SUPELEC Systems Sciences (E3S) - Automatic Control Department Gif sur Yvette France Faculty of Civil and Environmental Engineering Technion - Israel Institute of Technology Department of Engineering Cybernetics Norwegian University of Science and Technology

ISBN: (纸本)9781612848006

In this paper, we consider the regulation problem for uncertain and time-varying linear discrete-time systems with bounded input and bounded state. By using an interpolation technique it is shown that, the convex hull of a set of invariant ellipsoids is also invariant. Feasibility and robustly and asymptotically stable closed-loop behavior are assured by minimizing an appropriate objective function. Moreover we show that the control value can be computed by solving nonlinear equations.

关键词： Ellipsoids Interpolation Optimization Lyapunov methods Trajectory Vectors Robustness

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A novel approach for protein spots quantification in two-dimensional gel images

International Journal of Signal Processing, Image Processing...

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International Journal of Signal Processing, Image Processing and Pattern Recognition 2011年第1期4卷 1-14页

作者： Rashwan, Heshmat A. Sarhan, Amany M. Faheem, Muhammed Talaat Youssef, Bayumy A. Knowledge-Based Systems Department Informatics Research Institute Mubarak City for Science and Technology Borg ElArab Alexandria Egypt Computers and Automatic Control Engineering Department Faculty of Engineering University of Tanta Tanta Egypt Computer-Based Applications Department Informatics Research Institute Mubarak City for Science and Technology Borg ElArab Alexandria Egypt

Two-dimensional polyacrylamide gel electrophoresis of proteins is a robust and reproducible technique. It is the most widely used separation tool in proteomics. Current efforts in the field are directed at development of tools for expanding the range of proteins accessible with two-dimensional gels. Proteomics was built around the two-dimensional gel. The idea that multiple proteins can be analyzed in parallel grew from two-dimensional gel maps. Proteomics researchers needed to identify interested protein spots by examining the gel. This is time consuming, labor extensive and error prone. It is desired that the computer can analyze the proteins automatically by first detecting then quantifying the protein spots in the 2-D gel images. In our previous work, we presented a new technique for segmentation of 2-D gel images using the fuzzy c-means algorithm using the notion of fuzzy relations. In this paper, we will describe the new relational fuzzy c-means algorithm (RFCM) and use it for automatic protein spots quantification. We will also use two methods to evaluate its performance: the unsupervised evaluation method and comparison with the expert spots quantification.

关键词： Proteins

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A Review of Energy Efficiency in Data Processing Centers

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Journal of Energy and Power engineering 2011年第4期5卷 361-372页

作者： C. Redondo A. Fern/mdez Castile and Leon Technological Center for Supercomputing （FCSC） Edificio CRAI- TIC Campus de Vegazana s/n University of Le6n E-24071-Lean Spain Electrical Engineering and Systems Engineering and Automatic Control Department Faculty of lndustrial and Computer Engineering University of Leon E-24071-Leon Spain

This article explores, through a case study, measures of energy efficiency in data processing centers. An analysis of this case demonstrates how the design criteria could improve the rate of consumption in IT centers, which is currently the second most contaminating industry on the planet, and is the responsible for 2% of CO2 emissions, surpassed only by the aeronautical industry. The present and future situation of IT center energy consumption and associated environmental effects is analyzed, and also looks at how state-of-the-art technology, correctly implemented, could ensure significant rationalization of data processing center energy consumption. The article will examine optimization techniques, specific problems and case studies.

关键词： Energy management data processing centers energy efficiency.

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Intelligent control of a low power D.C. servodrive

Intelligent control of a low power D.C. servodrive

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IEEE International Joint Conferences on Computational Cybernetics and Technical Informatics, ICCC-CONTI 2010

作者： Dumitriu, Silviu Constantin, Nicolae University Politehnica of Bucharest Automatic Control and Computers Faculty Automatic Control and Systems Engineering Department Spl. Independentei 313 77206 Bucharest Romania

ISBN: (纸本)9781424474332

The paper presents the concept and implementation of an intelligent motion controller for a low power brushless servodrive. Fuzzy logic control and fuzzy reasoning tuning procedures are used for speed and current controllers respectively. A digital signal processor (DSP) based hardware set-up and a specialized software environment are used to laboratory experiments. Experimental results proved the effectiveness of the proposed intelligent control scheme. © 2010 IEEE.

关键词： Digital signal processors

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