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作者： Algeeb, A. Albagul, A. Asseni, A. Khalifa, O. Jomah, O.S. Department of Electrical and Electronic Engineering Academy of Graduate Studies Tripoli Libya Department of Control Engineering Higher Institute of Electronics Baniwalid Libya Department of Electrical and Computer Engineering IIUM Kuala Lumpur Malaysia Faculty of Electrical Engineering Automatics Computer Science and Electronics AGH University of Science and Technology Poland

ISBN: (纸本)9789604742486

This paper describes the design and fabrication of an intelligent Irrigation control system that allows intelligent control of the water applied to the field at right amounts and times. The system should have the capabilities to measure the water content in the soil so water can be applied as needed. The WATERMARK soil moisture sensor based on the measurement of the soil tension will provide the measurement of the water content. The system measures the soil tension, soil temperature and rain status and records the data in a file for future reference. It will apply water to field if a certain level of soil water tension is reached. This intelligent Irrigation control system is suitable for universities, research centers and farms where a control of the soil water content is required. The system can be used to study the water requirements for crops so irrigation can be scheduled efficiently.

关键词： Fabrication

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Hierarchical control Structure for Thermoenergetical Processes

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IFAC Proceedings Volumes 2010年第8期43卷 257-262页

作者： C. Dimon T.B. Airimitoaie F.G. Filip Faculty of Automatic Control and Computer Science University “Politehnica” of Bucharest 313 Splaiul Independentei 060042 Bucharest Romania Romanian Academy 125 Calea Victoriei Bucharest Romania

A new methodology for the design of control systems for real time applications is presented. It is proposed to have a first stage of assisted design of nominal systems with simulation based verification of the achieved performances. The control algorithm will then be improved by robustification to reproduce as good as possible the performances obtained in simulation on the real time process. Finally, a supervisor is implemented to optimize the thermo-energetic process and to compute the best choice for the reference signals.

关键词： Robustness control system design optimization robust control real time.

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Hierarchical configuration for petrochemical plants control

Hierarchical configuration for petrochemical plants control

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Mediterranean Conference on control and Automation (MED)

作者： Messaouda Azzouzi Dumitru Popescu Ciprian Lupu Ziane Achour University of Djelfa Djelfa Algeria Faculty of Automatic Control and Computer Science Politehnica University of Bucharest Bucharest Romania

A design and an implementation of a high performance control configuration for chemical and petrochemical processes and plants were been presented in this paper. We have proposed a hierarchical configuration of control by considering the external factors effects to assure the stability until the process operation. The study case in this paper was realized on a petrochemical plant which is a pyrolysis reactor that is located in the petroleum refinery of Pitesti, known as the greatest pole of oil separation and treatment in Romania. The proposed hierarchical configuration is organized on two levels of automation starting by data acquisition and theirs primary processing as low level of automation and then the optimization solution definition which represents the efficient operating decision of the pyrolysis reactor as a high level of automation in which a new approach of optimization was been proposed. During this application we have used some of the most recent automation software's that were planted in the ACPC laboratory computers, automatic control and computer science faculty of Bucharest.

关键词： Inductors Optimization Process control Mathematical model Petroleum Petrochemicals Automation

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Modeling the influence of non-minimum phase zeros on gradient based linear iterative learning control

Modeling the influence of non-minimum phase zeros on gradien...

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IEEE Conference on control Technology and Applications (CCTA)

作者： David H. Owens Bing Chu Zhonglun Cai Eric Rogers Chris T. Freeman Paul L. Lewin Department of Automatic Control and Systems Engineering University of Sheffield Sheffield UK School of Electronics and Computer Science University of Southampton Southampton UK

The subject of this paper is modeling of the influence of non-minimum phase plant dynamics on the performance possible from gradient based norm optimal iterative learning control algorithms. It is established that performance in the presence of right-half plane plant zeros typically has two phases. These consist of an initial fast monotonic reduction of the L 2 error norm followed by a very slow asymptotic convergence. Although the norm of the tracking error does eventually converge to zero, the practical implications over finite trials is apparent convergence to a non-zero error. The source of this slow convergence is identified and a model of this behavior as a (set of) linear constraint(s) is developed. This is shown to provide a good prediction of the magnitude of error norm where slow convergence begins. Formulae for this norm are obtained for single-input single-output systems with several right half plane zeroes using Lagrangian techniques and experimental results are given that confirm the practical validity of the analysis.

关键词： Convergence Approximation methods Cost function Hilbert space Algorithm design and analysis Mathematical model Predictive models

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Nuclear fusion control-oriented plasma current linear models

Nuclear fusion control-oriented plasma current linear models

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作者： Garrido, Aitor J. Garrido, Izaskun Goretti Sevillano, M. Alberdi, Mikel Amundarain, Modesto Barambones, Oscar De La Sen, Manuel Department of Systems Engineering and Automatic Control School of Technical Industrial Engineering Campus of Bilbao Plaza Casilla 3 48012- Bilbao Spain Department of Systems Engineering and Automatic Control School of Technical Industrial Engineering Campus of Vitoria Nieves Cano 12 01006-Vitoria Spain Department of Electricity and Electronics Faculty of Science and Technology Institute of Research and Development of Processes PO Box 644 Bilbao Spain

ISBN: (纸本)9789604741991

The control of plasma in nuclear fusion has been revealed as a promising application of control Engineering, with increasing interest in the control community during last years. In this paper it is developed a control-oriented linear model for the control of plasma current. For this purpose, it is provided a summary of the background necessary to deal with control problems in tokamak-based nuclear fusion reactors as it is the case of the future ITER tokamak. Besides, it is also given a review of the most used simulators and plasma models, with the aim of providing an adequate background for control engineers to derive their own control-oriented model or to choose the appropriate existing one. Finally, the proposed plasma model performance is proven in a current drive profile trajectory tracking problem using a modified anti-windup PIDbased control scheme.

关键词： Tokamak devices

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A new watershed algorithm for protein spot detection in 2DGE images using the notion of fuzzy relations

A new watershed algorithm for protein spot detection in 2DGE...

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International Conference on computer Technology and Development (ICCTD)

作者： Shaheera Rashwan Talaat Faheem Amany Sarhan Bayumy A.B. Youssef Informatics Research Institute Mubarak City of Science and Technology Alexandria Egypt Computer Science and Automatic Control Department Faculty of Engineering Tanta University Tanta Egypt

An important issue in the analysis of two-dimensional electrophoresis images is the detection and quantification of protein spots. The main challenges in the segmentation of 2DGE images are to separate overlapping protein spots correctly and to find the abundance of weak protein spots. To enable comparison of protein patterns between different samples, it is necessary to match the patterns so that homologous spots are identified. In this paper we describe a new robust technique to segment and model the different spots present in the gels. The watershed segmentation algorithm is modified to handle the problem of over segmentation by initially partitioning the image to mosaic regions using the composition of fuzzy relations. The experimental results showed the effectiveness of the proposed algorithm to overcome the over segmentation problem associated with the available algorithms.

关键词： Image segmentation Zinc Databases Pixel

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Linear models for plasma current control in tokamak reactors

Linear models for plasma current control in tokamak reactors

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International Conference on control, Automation, Robotics and Vision (ICARCV)

作者： Aitor J. Garrido Izaskun Garrido M. Goretti Sevillano Modesto Amundarain Mikel Alberdi Oscar Barambones Manuel De la Sen Department of Systems Engineering and Automatic Control School of Technical Industrial Engineering Bilbao Spain Department of Systems Engineering and Automatic Control School of technical Industrial Engineering Vitoria Spain Department of Electricity and Electronics Institute of Research and Development of Processes Faculty of Science and Technology Bilbao Spain

关键词： Mathematical model Equations Tokamaks Magnetohydrodynamics Magnetic fields Computational modeling

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Continuous monitoring system for estimation the quality of service of computer network

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Journal of Applied sciences 2010年第18期10卷 2034-2040页

作者： Sayenko, Vladimir Al Rawajbeh, Mohammad Golubev, Alexandr Department of Information and Control System Faculty of Computer Science Kharkov National University of Radio Electronics Ukraine Department of Management Information System Faculty of Administrative and Financial Sciences Al Isra Private University Jordan

The aim of this study is to develop a method for evaluation of service quality estimations in continuous monitoring system for computer networks. The computer network is considered as dynamic system with service functionality objects. We proposed the composed concept of quality of service evaluation in conditions of continuous monitoring process. It is suggested to reduce the services state estimation to the forming of qualitative estimates of a state and calculating a trend of these estimates values. Practical significance consists in rising of networks controllability and decreasing its exploitation cost by the possibility of the service quality analysis, forecasting its changes, which allows making the appropriate control decision. The method is based on consideration the service as the functional network object describable with the set of service state indexes, which are varying in time. Quality if service is also determined by the set of these indexes and also varies in time. The suggested method allows us to estimate the service by its quality in the current time and by the forecasted quality for the next two times taking in account given values of thresholds. It is also proposed to evaluate service quality indices as quantity on time and prediction estimations. Correctness of the solutions is proved by examples. © 2010 Asian Network for Scientific Information.

关键词： Quality of service

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Cooperative Operating control Based on Virtual Resources and User-Suited HCI

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6th International Conference on Cooperative Design, Visualization and Engineering

作者： Choinski, Dariusz Metzger, Mieczyslaw Nocon, Witold Faculty of Automatic Control Electronics and Computer Science Poland

ISBN: (纸本)9783642042645

The paper presents concept of virtual resources (VR) which improve multilevel, remote Internet-based operation of real-time controlled industrial processes. In comparison to classical directly connected-to-plant operations, the VR-based system introduces all typical features of its flexible nature, hiding the unnecessary implementation details from the process operators. The user-suited, human-computer interfaces (HCI) improve cooperation between specialists who must carry out operating control of the process. Realisation of such a system is based on the concept of maximal usage of particular specialist's skills improving theirs cooperation. Although the proposed concept is dedicated to remote operating experimentation on real-time controlled industrial plants, it has also a more general aspect. As a case example, the cooperative operating control of a biotechnological pilot-plant is presented.

关键词： Cooperative operating control virtual resources (VR) Multi-Agent System (MAS) self-organising data base

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Iterative Learning control of the Redundant Upper Limb for Rehabilitation

Iterative Learning Control of the Redundant Upper Limb for R...

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American control Conference

作者： C. T. Freeman P. L. Lewin E. Rogers D. H. Owens School of Electronics and Computer Science University of Southampton SO17 1BJ UK Department of Automatic Control and Systems Engineering University of Sheffield S1 3JD UK

ISBN: (纸本)9781424474264

A non-linear iterative learning control approach is developed for application to stroke rehabilitation. The subject is seated in a robotic workstation and electrical stimulation is applied to their triceps muscle to assist the tracking of trajectories in a horizontal plane. In addition to rotation about vertical axes through the shoulder and elbow joints, the forearm is also permitted to elevate in order to provide full arm extension. A dynamic model of the human arm is first developed, and then constraints are introduced to overcome kinematic redundancy. The expressions necessary to implement the control law are derived, and experimental results confirm its ability to achieve a high level of performance in practice.

关键词： Level of Performance Triceps control law Iterative learning control Elbow Joint Upper Extremity horizontal plane Redundant Electric Stimulation Shoulder trajectory Model of Human Occupation Manikins Stroke Rehabilitation Workstations

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