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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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Functions approximation based on locally learning techniques

Functions approximation based on locally learning techniques

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

作者： Constantin, Nicolae Dumitriu, Silviu 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

This paper presents a new algorithm for approximating a nonlinear function by means of local models. It is proposed a memory-based technique for selecting the best model configuration by comparing different alternatives. A recursive technique for local model identification and validation is presented, together with an enhanced statistical method for model selection. The shapes and locations of receptive fields are changed in an adaptive manner. The learning capabilities are demonstrated by means of some examples. © 2010 IEEE.

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Decomposition based algorithm for state prediction in large scale distributed systems

Decomposition based algorithm for state prediction in large ...

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9th International Symposium on Parallel and Distributed Computing, ISPDC 2010

作者： Istin, Mihai Vişan, Andreea Pop, Florin Cristea, Valentin Faculty of Automatic Control and Computers Computer Science Department University Politehnica of Bucharest Romania

ISBN: (纸本)9780769541204

Prediction represents an important component of resource management, providing information about the future state, utilization and availability of resources. We propose a new prediction algorithm inspired from the decomposition of a complex wave into simpler waves with fixed frequencies (similar to Fourier decomposition). The partial results obtained from this decomposition stage are combined using approaches inspired from artificial intelligence models. The experimental results for different system parameters, used in Alice experiment, highlight the great improvement, discussed in terms of error reduction, offered by this new prediction algorithm. The tests were made using real-time monitoring data provided by a system monitoring tool, in the case of one-step and multi-step ahead prediction. The prediction's results can be used by the resource management systems in order to improve the scheduling decisions, assuring the load balancing and optimizing the resource utilization. © 2010 IEEE.

关键词： Forecasting

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A distributed approach to Business Intelligence systems synchronization

A distributed approach to Business Intelligence Systems sync...

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作者： Ciobanu, Vlad Pop, Florin Popescu, Decebal Cristea, Valentin Computer Science Department Faculty of Automatic Control and Computers University POLITEHNICA of Bucharest Romania

ISBN: (纸本)9780769543246

This paper presents a distributed solution of the synchronization of Business Intelligence (BI) systems via networking services. The main problem addressed by the proposed project is to create a common solution that allows automatically redeploying of business intelligence applications among different servers located in the Internet. A case study by using the Microsoft BizTalk Server as a Business Intelligence system is presented included in a research project called PrO Processor. The research came as a necessity because of the lack of support for remote deployment of applications via Internet. Our solution overcomes this issue and presents the synchronization architecture capable of transporting, installing and starting BI applications, orchestrations and ports to any number of BI servers in the Internet. © 2010 IEEE.

关键词： Web services

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An adaptive scheduling approach in distributed systems

An adaptive scheduling approach in distributed systems

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2010 IEEE 6th International Conference on Intelligent Computer Communication and Processing, ICCP10

作者： Olteanu, Alexandra Pop, Florin Dobre, Ciprian Cristea, Valentin Faculty of Automatic Control and Computers Computer Science Department University Politehnica of Bucharest Romania

ISBN: (纸本)9781424482306

A large number of scheduling algorithms for large scale distributed systems have been proposed, studied and compared. In spite of this, there are few studies comparing the performance of scheduling algorithms considering at the same time the distributed system structure on which we want to schedule the tasks;the type of directed acyclic graph (DAG), in which graph nodes represent tasks and graph edges represent data transfers;and the type of tasks, for example CPU-bound vs. I/O bound. This paper proposes a method for selecting, in a dynamic manner, the most appropriate scheduling algorithm for a particular distributed system, after a previous analysis. Choosing the best known scheduling algorithm can improve performance of an application if all the aspects previously enumerated are considered. The results of this paper consist in a comparison of the scheduling algorithms performance for the following scheduling algorithms: Modified Critical Path, Cluster ready Children First, Earliest Time First, Highest Level First with Estimated Times and Hybrid Remapper Minimum Partial Completion Time Static Priority. However, the main purpose of this investigation tests is to demonstrate the usefulness of the presented scheduling approach using these results. © 2010 IEEE.

关键词： Scheduling algorithms

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H ∞ predictive control of networked control systems

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International Journal of control 2011年第6期84卷 1080-1097页

作者： Xia, Yuanqing Li, Li Liu, Guo-Ping Shi, Peng Department of Automatic Control Beijing Institute of Technology Beijing 100081 China Faculty of Advance Technology University of Glamorgan Pontypridd CF37 1DL United Kingdom Faculty of Advance Technology University of Glamorgan Pontypridd CF37 1DL United KingdomSchool of Engineering and Science Victoria University Melbourne VIC 8001 Australia

This article is concerned with the problem of H∞ predictive control of networked control system with random network delay. A new control scheme termed networked predictive control is proposed. This scheme mainly consists of the control prediction generator and network delay compensator. While designing the predictor, the control input to the actuator may be different due to networked induced time-delay and data dropout, and two cases are considered depending on the way that the observer obtains the plant control input ut. The necessary and sufficient conditions are given for the closed-loop networked predictive control system to be stochastically stable for different ut and random network delays in controller to actuator channel (CAC) and sensor to controller channel (SCC). A simulation study shows the effectiveness of the proposed scheme. [ABSTRACT FROM AUTHOR]

关键词： H∞ stochastically stable with noise attenuation level γ networked control systems predictive control random network delay

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Vehicular networks in a computerized city using Safe Mobile

Vehicular networks in a computerized city using Safe Mobile

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International Conference on systems and Networks Communications

作者： Dorel, Nasui Andra, Oana Florentina Valentin, Sgarciu Bogdan, Oprea Technical Department American International Radio Inc. IL United States Dept. of Automatic Control and Industrial Informatics Faculty of Automatic Control and Computers UPB Bucharest Romania

ISBN: (纸本)9780769541457

The paper is aimed to describe innovative assets tracking applications using Safe Mobile remote control units, based on S4I development platform. The wireless monitoring system enables different types of vehicular units to communicate with each other. Also, the units are able to contact and to be contacted by a central dispatch entity. Client or web-hosted applications, hosted on central servers, in the cloud, can be accessed by the end user both for receiving real-time data from the monitored units and sending out the commands. The system brings major achievements to the wireless communication in vehicular networks, the most important one being the reduction of the amount of time in which an emergency situation is identified and resolved. © 2010 IEEE.

关键词： Remote control

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Improved vertex control for time-varying and uncertain linear discrete-time systems with control and state constraints

Improved vertex control for time-varying and uncertain linea...

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2011 American control Conference (ACC)

作者： H.N. Nguyen P.-O. Gutman S. Olaru M. Hovd F. Colledani Automatic Control Department SUPELEC Systems Sciences (E3S) Gif sur Yvette France Faculty of Civil and Environmental Engineering Technion Israel Institute of Technology Israel Norwegian University of Science and Technology Norway LIST Interactive Robotics Laboratory CEA Fontenay-aux-Roses France

This paper addresses the problem of regulating a discrete-time linear uncertain and time-varying system to the origin. It is shown that, based on an interpolation technique, by minimizing an appropriate objective function, how feasibility and a robustly and asymptotically stable closed-loop behavior can be achieved. It is shown that the control is a piecewise affine and continuous function of the state. Several simulations demonstrate the performance of our results.

关键词： Interpolation Trajectory Robustness Linear programming Lyapunov methods Closed loop systems

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Parameter optimization of FES-assisted indoor rowing exercise using MOGA

Parameter optimization of FES-assisted indoor rowing exercis...

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Asia Modelling Symposium 2010: 4th International Conference on Mathematical Modelling and Computer Simulation, AMS2010

作者： Hussain, Zakaria Tokhi, M. Osman Jailani, Rozita Ahmad, Fadzil Faculty of Electrical Engineering Universiti Teknologi MARA Malaysia Department of Automatic Control and System Engineering University of Sheffield United Kingdom

ISBN: (纸本)9780769540627

This paper describes the parameter optimization of fuzzy logic control (FLC) of FES-assisted indoor rowing exercise (FES-rowing) using multi objective genetic algorithm (MOGA). The indoor rowing exercise is introduced as a total body exercise for rehabilitation of function of lower extremities through the application of functional electrical stimulation (FES). FLC is used to control the knee and elbow trajectories for smooth rowing manoeuvre. MOGA is implemented in Matlab with a dynamic simulation model of indoor rowing exercise is developed using Visual Nastran (vN4D) software environment. MOGA is used to optimize the FES-rowing with two objective functions specified that are i) to minimize the mean squared error of knee angle trajectory and ii) to minimize the total electrical stimulation required by the muscles. In view of good results obtained, it is concluded that MOGA is able to obtain the optimal design of FLC for FES-rowing with two conflicting objectives. © 2010 IEEE.

关键词： MATLAB

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Text line processing for high-confidence skew detection in image documents

Text line processing for high-confidence skew detection in i...

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2010 IEEE 6th International Conference on Intelligent Computer Communication and Processing, ICCP10

作者： Rosner, Daniel Boiangiu, Costin-Anton Ştefãnescu, Alexandra ŢǍpuş, Nicolae Olteanu, Alexandra Computer Science Department Faculty of Automatic Control and Computers University Politehnica of Bucharest Splaiul Independentei 313 060042 Bucharest Romania

ISBN: (纸本)9781424482306

Skew detection and correction is an important step in automated content conversion systems, on which overall system performance is dependent. Although there are many working solutions at the present time, the search for an algorithm that can achieve good error rates in a fast running time and on different layout types is still open, so new solutions for skew detection are needed. The paper at hand presents a neighbor clustering based approach that has the classical advantages of this class of algorithms - the speed, but delivers better accuracy, comparable with that of Hough based solutions. © 2010 IEEE.

关键词： Hough transforms

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