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Fault Detection in IP-based Process control Networks using Data Mining

Fault Detection in IP-based Process Control Networks using D...

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IFIP/IEEE International Symposium on Integrated Network Management (IM 2009)

作者： Park, Byungchul Won, Young J. Yu, Hwanjo Hong, James Won-Ki Noh, Hong-Sun Lee, Jang Jin Dept. of Computer Science and Engineering POSTECH South Korea Electric and Control Maintenance Dept. POSCO South Korea

ISBN: (纸本)9781424434862

Industrial process control IP networks support communications between process control applications and devices. Communication faults in any stage of these control networks can cause delays or even shutdown of the entire manufacturing process. The current process of detecting and diagnosing communication faults is mostly manual, cumbersome, and inefficient. Detecting early symptoms of potential problems is very important but automated solutions do not yet exist. Our research goal is to automate the process of detecting and diagnosing the communication faults as well as to prevent problems by detecting early symptoms of potential problems. To achieve our goal, we have first investigated real-world fault cases and summarized control network failures. We have also defined network metrics and their alarm conditions to detect early symptoms for communication failures between process control servers and devices. In particular, we leverage data mining techniques to train the system to learn the rules of network faults in control networks and our testing results show that these rules are very effective. In our earlier work, we presented a design of a process control network monitoring and fault diagnosis system. In this paper, we focus on how the fault detection part of this system can be improved using data mining techniques.

关键词： Process control network network management fault detection fault diagnosis machine learning data mining

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LPV non-integer order model and control of an irrigation canal using gain scheduling technique

LPV non-integer order model and control of an irrigation can...

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35th Annual Conference of the IEEE Industrial Electronics Society, IECON 2009

作者： Martínez, Rubén Bolea, Yolanda Grau, Antoni Martínez, Herminio Automatic Control Dept. Technical University of Catalonia Barcelona Spain Electronics Engineering Dept. Technical University of Catalonia Barcelona Spain

In this paper, a novel method for controlling main irrigation canals with variable dynamic parameters is proposed. A non-integer order based gain-scheduling controller for canal systems is presented. This controller takes into account the variations of parameters in each operating point by using a linear parameter variable (LPV) non-integer order model obtained by fractional LPV identification. This non-integer controller has been designed in accordance with the control input bound and assure closed loop poles placement desired in all the working operation canal range. This approach is validated in a pilot canal plant. control results guarantee the desired performance and stability for slow parameters variation in the whole operation canal range. ©2009 IEEE.

关键词： Irrigation canals

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Mid and short term conflict resolution in autonomous aircraft operations 8

Mid and short term conflict resolution in autonomous aircraf...

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8th Innovative Research Workshop and Exhibition

作者： Chaloulos, Georgios Roussos, Giannis P. Lygeros, John Kyriakopoulos, Kostas J. Automatic Control Lab Dept. of Electrical Engineering ETH Zürich Zürich Switzerland Control Systems Lab Dept. of Mechanical Engineering National Technical University of Athens Zografou Greece

We investigate the conflict resolution problem in a self separation airspace. Using the recent advances in the fields of robotics and control, we use navigation functions to resolve conflicts arising in the Short Term, which guarantee conflict avoidance, while in Mid Term, a model predictive controller makes sure that the designed system respects the operational constraints of the situation and maximizes some performance for the system. Both algorithms operate in a decentralized scheme, following the autonomous aircraft concept investigated under the European project iFly. Priority issues are discussed and ways to take them into consideration in our setting are shown. The algorithm performance is demonstrated on simulations in planar configurations.

关键词： Robots

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A sensorless vector control of induction motor drives based on artificial neural networks

A sensorless vector control of induction motor drives based ...

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作者： Barambones, Oscar Dept. of Automatic Control and System Engineering University of the Basque Country EUI Nieves cano 12 Vitoria Spain

ISBN: (纸本)9783902661463

This paper presents a speed control of an induction motor. The design uses an feedforward Artificial Neural Network (ANN) to implement a rotor speed estimator, and a robust control strategy based on the sliding-mode. The proposed control scheme also make use of the field oriented control theory to simplify the proposed control design. The stability analysis of the presented control scheme is provided using the Lyapunov stability theory. Finally simulated results show that the presented controller with the proposed observer provides high-performance dynamic characteristics and that this scheme is robust with respect to plant parameter variations and external load disturbances. © 2009 IFAC.

关键词： Vector control (Electric machinery)

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Web-based control laboratory: The ball and beam system

Web-based control laboratory: The ball and beam system

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作者： Guinaldo, M. Vargas, H. Sánchez, J. Sanz, E. Dormido, S. Dept. Of Computer Science and Automatic Control UNED C/ Juan del Rosal 16 28040 Madrid Spain

ISBN: (纸本)9783902661562

This paper presents a Web-based control laboratory of a non-linear and unstable system: the ball and beam plant. Different control strategies, apart from the traditional PID, as Robust, Fuzzy and PD-Reset control have been taken to give students a wider vision of control approaches. The client-side of the virtual laboratory has been developed using EJS (Easy Java Simulations), an open-source tool that allows creating Java applications easily. Meanwhile, the application that locally interacts with the system is written in LabVIEW. Different experiences are presented showing the advantages of advanced control strategies over PD control.

关键词： Websites

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Reconfigurable parallel kinematic manipulator for flexible manufacturing

Reconfigurable parallel kinematic manipulator for flexible m...

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作者： Haage, Mathias Dressler, Isolde Robertsson, Anders Nilsson, Klas Brogardh, Torgny Johansson, Rolf Dept. Computer Science LTH Lund University Lund Sweden Dept. Automatic Control LTH Lund University Lund Sweden ABB Robotics SE-72168 Vasteras Sweden

ISBN: (纸本)9783902661432

Flexible manufacturing puts high demands on industrial automation in terms of affordable and competitive solutions and is of key importance for short-lot production typically found in small and medium sized enterprises, situations where today manual labour is extensively used despite e.g., environmental issues and harsh working conditions. Key factors in the successful introduction of new robot automation concepts are that they provide both the desired performance and quality (technical capability), but also that they enable fast deployment and extend available task repertoire. The Gantry-Tau manipulator is a new robot concept which in contrast to other high-performance parallel kinematic manipulators (PKM), has a large, open working range. Its high stiffness makes it ideal for a wide range of tasks such as grinding, deburring, and cutting. An additional aspect of such a PKM is the modularity, which in this work has been studied in terms of possibilities for assembly and mechanical reconfiguration at the end-user site, integration of such a kinematically different robot with a standard industrial controller, and new needs for methods/tools to support simple (re)configuration. A range of software tools and methods were found to be useful and necessary for efficient engineering and integration of the concept in typical SME manufacturing scenarios. For experimental evaluation, two full-scale prototype robots were designed and built, the kinematic software was developed and integrated into a couple of different robot control systems, robot CAD software was adapted to the configuration needs, and both simulations and physical experiments were carried out. Our findings make us believe that enhanced software tools should be integrated on a higher symbolic (or meta-) level to better support transformation of data and code generation, but also that the Gantry-Tau type of robot (with adequate software support) will bring a new dimension of flexibility into SME manufacturing.

关键词： Kinematics

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The application of a parallel genetic algorithm to timetabling of elementary school classes: A coarse grained approach

The application of a parallel genetic algorithm to timetabli...

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ICAT 2009 - 2009 22nd International Symposium on Information, Communication and Automation Technologies

作者： Šrndić, Nedim Dervišević, Mirza Pandžo, Emir Konjicija, Samim Dept. of Computer Science Faculty of Electrical Engineering Sarajevo Bosnia and Herzegovina Dept. of Control and Electronics Faculty of Electrical Engineering Sarajevo Bosnia and Herzegovina

ISBN: (纸本)9781424442218

This paper describes the application of a Parallel Genetic Algorithm that solves the weekly timetable construction problem for elementary schools. Timetable construction is NPcomplete and highly constrained problem, and therefore represents a computationally intensive task. A Parallel Genetic Algorithm (PGA) is proposed with specific methods for chromosome representation and fitness evaluation, and specific recombination and mutation operators. The proposed solution uses a coarse grained PGA, which is suitable for execution on a Beowulf cluster. Experimental results are provided, with a comparison of serial and parallel execution times for the same algorithm. ©2009 IEEE.

关键词： Scheduling

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control system design and small signal analysis of APWM resonant inverter for induction heating

Control system design and small signal analysis of APWM reso...

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2009 International Conference on Electric Power and Energy Conversion Systems, EPECS 2009

作者： Helaimi, M. Bettayeb, M. Benghanem, M. Belmadani, B. Dept. of Electrical Engineering University of Hassiba Ben Bouali Chlef Algeria Electrical and Computer Engeneering Dept. College of Engeneering University of Sharjah United Arab Emirates Dep. of Automatic Control University of Mohamed Boudhiaf-Oran Algeria

ISBN: (纸本)9789948427155

This paper proposes an asymmetrical pulse width modulation (APWM) with frequency tracking control of full bridge series resonant inverter for induction heating application. In this method, APWM is used as power regulation, and phased locked loop (PLL) is used to attain zero-voltage-switching (ZVS) over a wide load range. The complete closed loop control model is obtained using small signal analysis. The validity of the proposed control is verified by simulation results.

关键词： Induction heating

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Space-state modeling and control of tokamak reactors

Space-state modeling and control of tokamak reactors

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作者： Garrido, I. Garrido, A.J. Sevillano, G. Alberdi, M. Amundarain, M. Barambones, O. Dept. Automatic Control and Systems Engineering Basque Country University EUITI de Bilbao Plza. de la Casilla 3 48012 Bilbao Spain Dept. Automatic Control and Systems Engineering Basque Country University EUITI de Vitoria Nieves Cano 12 01006 Vitoria-Gasteiz Spain

ISBN: (纸本)9783902661555

Nuclear fusion has the potential to produce unlimited, clean energy, which presents itself as a reliable energy supply but it also helps to stop the threat of climate change that faces the world nowadays. However, to sustain the pulse duration long enough to produce the necessary energy, new controls have to be developed, composing a new application area of control engineering, with new and interesting challenges for the control community. In this sense, this paper deals with the modeling of tokamak nuclear fusion reactors. In order to control the creation of unstable modes in fusion processes, it is necessary to derive numerical models suitable for control strategies. The model presented in this paper addresses flux and energy conservation issues, discussing the mechanisms behind the creation of uncontrollable modes. The dynamics of the system is given by means of the energy functions which are solved for the currents in the structure, plasma current and plasma position. Thus, the equations for the state variables are derived based on the Hamiltonian equation of motion. In order to solve this system numerically, this model is linearized around an operation point by taking a Newton-Raphson step. Besides, the system output is completed by considering the equations for the flux and the poloidal field. Finally, the resulting low-order linear model is modified so as to obtain the corresponding state-space model which is verified by means of numerical experiments.

关键词： Equations of motion

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Energy-aware sensor selection and scheduling in wireless sensor networks

Energy-aware sensor selection and scheduling in wireless sen...

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1st IFAC Workshop on Estimation and control of Networked Systems, NecSys'09

作者： Bitar, Eilyan Baeyens, Enrique Poolla, Kameshwar Dept. of Mechanical Engineering University of California Berkeley CA 94720 United States Dept. of Systems Engineering and Automatic Control University of Valladolid Paseo del Cauce s/n 47011 Valladolid Spain

ISBN: (纸本)9783902661524

This paper is concerned with system level energy management in wireless sensor networks. The network is required to conduct certain tasks which require information from individual sensors to be sent to a base station. Sensors cease functioning when they deplete their energy reserves or may fail abruptly due to random malfunctions. Sensor selection refers to the number of times sensors are interrogated, while sensor scheduling refers to the sequence in which these interrogations are conducted. A sensor management layer that isolates the system objectives from selection/scheduling is proposed. It is shown that sensor selection reduces to integer linear programming. Sensor scheduling is necessary when random sensor failures are considered or when the task definition is not stationary. Some general principles emerge. If all sensors are equally reliable, the optimal policy is to use the most energetic sensors first. If all sensors are equally energetic, the optimal policy is to use the least reliable sensor first. © 2009 IFAC.

关键词： Wireless sensor networks

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