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IEEE International Conference on Industrial Technology

作者： Pha N. Pham Kazuhisa Ito Shigeru Ikeo Shibaura Institute of Technology College of System Engineering and Science Department of Machinery and Control Systems 307 Fukasaku Saitama city 337-8507 Japan Sophia University Faculty of Science and Technology Department of Engineering and Applied Sciences Kioicho 7-1 Chiyoda Tokyo 102-8554 Japan

ISBN: (纸本)9781467345675

Because of the serious situation of environmental pollution all over the world, the water hydraulic technique using pure tap water as a pressure medium has become new drive source comparable to electric, oil hydraulic, and pneumatic drive systems. Furthermore, water hydraulics is also preferred because of its high power density, clean, high safety against fire hazards, and easy availability. However, the main problems for precise control in water hydraulic systems are steady state errors and overshoot due to its large friction torque and considerable leakage flow. In this study, a simple adaptive control (SAC) algorithm that is appropriate for dealing with these problems will be applied to a water hydraulic servo motor system for both angle and velocity controls. SAC also has simple, lower order structure, and few adaptive parameters;thus, it is high feasibility in real applications. For both angle and velocity controls using SAC, the tracking performances are good in simulation: 0.08 degree and almost 0 revolution per minute (min~(-1)) for angle and velocity controls, respectively. The controllers also can highly attenuate the effects of disturbances.

关键词： Servomotors Valves Friction Adaptive control Velocity control Transfer functions Water pollution

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Optimal allocation of distributed generators in a distribution network using adaptive multi-objective particle swarm optimization

Optimal allocation of distributed generators in a distributi...

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2011 International Conference on Electrical, Information engineering and Mechatronics, EIEM 2011

作者： Cheng, Shan Chen, Min-You Fleming, Peter J. Li, Xia State Key Laboratory of Power Transmission Equipment and System Security and New Technology School of Electrical Engineering Chongqing University Chongqing China Department of Automatic Control and Systems Engineering University of Sheffield Sheffield United Kingdom

ISBN: (纸本)9781447124665

This study presents the optimal allocation of distributed generators (DGs) in distribution network based on an adaptive multi-objective particle swarm optimization (AMPSO). In order to enable the DGs to make the best contribution to the distribution network, a multi-objective optimization model addressing power loss and a voltage stability index (VSI) is constructed, in which the capacity factor of DGs is taken into consideration. In the AMPSO, some adaptive techniques including the use of dynamically changing inertia weight, time-varying acceleration coefficients, mutation operation and circular crowding sorting have been integrated to improve the convergence and the diversity performance of the algorithm. The proposed algorithm has been used to determine the optimal allocation of DGs in a IEEE 33-bus distribution network. Simulation results show that the proposed method can identify the optimal solutions with a good tradeoff between the power loss and the VSI. © 2012 Springer-Verlag London Limited.

关键词： Multiobjective optimization

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Reference governor design with guarantees of detection for delay variation

Reference governor design with guarantees of detection for d...

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10th IFAC Workshop on Time Delay systems, TDS-2012

作者： Stanković, Nikola Stoican, Florin Olaru, Sorin Niculescu, Silviu-Iulian SUPELEC System Sciences E3S - Automatic Control Department Gif-sur-Yvette France Norwegian University of Science and Technology Department of Engineering Cybernetics Trondheim Norway SUPELEC CNRS LSS - Laboratory of Signals and Systems Gif-sur-Yvette France

ISBN: (纸本)9783902823045

The present paper deals with fault tolerant control for linear dynamics with additive disturbances. The control action is generated based on information collected from a redundant, multi-sensors network. Delays that may appear during plant measurements transmission through real communication channels are considered as faults. Depending on presence of delay in feedback loop, different invariant sets can be computed. We show that fault tolerant control can be achieved through invariant sets separation with respect to different delay values. Sets separation is accomplished for specific values of the reference signal. Therefore, we introduce in the loop a reference governor which is designed by a receding horizon technique. Thus, we provide reference signals which practically guarantee fault detection and identification in real time. © 2012 IFAC.

关键词： Fault tolerance

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Impulse response estimation with binary measurements: a regularized FIR model approach

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IFAC Proceedings Volumes 2012年第16期45卷 113-118页

作者： Tianshi Chen Yanlong Zhao Lennart Ljung Division of Automatic Control Department of Electrical Engineering Linköping University Linköping Sweden Key Laboratory of Systems and Control Institute of Systems Science Academy of Mathematics and System Science Chinese Academy of Sciences Beijing China

FIR (finite impulse response) model is widely used in tackling the problem of the impulse response estimation with quantized measurements. Its use is, however, limited, in the case when a high order FIR model is required to capture a slowly decaying impulse response. This is because the high variance for high order FIR models would override the low bias and thus lead to large MSE (mean square error). In this contribution, we apply the recently introduced regularized FIR model approach to the problem of the impulse response estimation with binary measurements. We show by Monte Carlo simulations that the proposed approach can yield both better accuracy and better robustness than a recently introduced FIR model based approach.

关键词： Impulse response estimation regularization quantization

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Optimising performance in steady state for a supermarket refrigeration system

Optimising performance in steady state for a supermarket ref...

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2012 20th Mediterranean Conference on control and Automation, MED 2012

作者： Green, Torben Kinnaert, Michel Razavi-Far, Roozbeh Izadi-Zamanabadi, Roozbeh Niemann, Henrik Danfoss A/S Refrigeration and A/C Controls 6430 Nordborg Denmark Department of Electronic Systems Aalborg University 9220 Aalborg Denmark Department of Control Engineering System Analysis at Université Libre de Bruxelles 1050 Bruxelles Belgium Department of Electrical Enigeering Technical University of Denmark 2800 Lyngby Denmark

ISBN: (纸本)9781467325318

Using a supermarket refrigeration system as an illustrative example, the paper postulates that by appropriately utilising knowledge of plant operation, the plant wide performance can be optimised based on a small set of variables. Focusing on steady state operations, the total system performance is shown to predominantly be influenced by the suction pressure. Employing appropriate performance function leads to conclusions on the choice of set-point for the suction pressure that are contrary to the existing practice. Analysis of the resulting data leads to a simple method for finding optimal pressure set-point for given load situations. © 2012 IEEE.

关键词： Refrigeration

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Development of a cloud-computing-based equipment monitoring system for machine tool industry

Development of a cloud-computing-based equipment monitoring ...

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2012 IEEE International Conference on Automation Science and engineering: Green Automation Toward a Sustainable Society, CASE 2012

作者： Hung, Min-Hsiung Lin, Yu-Chuan Quoc Huy, Tran Yang, Haw-Ching Cheng, Fan-Tien Department of Computer Science and Information Engineering Chinese Culture University Taipei Taiwan Institute of Manufacturing Information and Systems National Cheng Kung University Tainan Taiwan Institute of System Information and Control National Kaohsiung First University of Science and Technology Kaohsiung Taiwan

ISBN: (纸本)9781467304283

This paper aims to present the design of a cloud computing-based equipment monitoring system (EMS), called CCEMS, for the CNC machine tool industry to illustrate the paradigm shift of EMSs from basing on the Internet to basing on the cloud. In the CCEMS, Graphical User Interface (GUI) plays an important role that allows users to interact with the system for controlling and operating equipment, monitoring equipment performance and statuses, detecting and diagnosing equipment faults, conjecturing production quality and precision of equipment, and so on. To overcome the shortcomings of traditional Web GUIs, this paper proposes a novel Web application implementation framework, called NWAIF, for the CCEMS, by using Service-Oriented Architecture (SOA) and Rich Internet Application (RIA) technology. Finally, a paradigm CCEMS for monitoring CNC machine tools is constructed and used to validate the efficacy of the CCEMS and NWAIF. Testing results show that the paradigm CCEMS meets the desired functional requirements and the GUIs created by using the proposed NWAIF is superior to traditional Web-based GUIs in terms of shorter response times to complete the testing operations. © 2012 IEEE.

关键词： Graphical user interfaces

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Timefrequency data fusion technique with application to vibration signal analysis

Timefrequency data fusion technique with application to vibr...

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作者： Peng, Z.K. Zhang, W.M. Lang, Z.Q. Meng, G. Chu, F.L. State Key Laboratory of Mechanical System and Vibration Shanghai Jiao Tong University Shanghai 200240 China Department of Automatic Control and Systems Engineering University of Sheffield Mappin Street Sheffield S1 3JD United Kingdom Department of Precision Instruments Tsinghua University Beijing 100084 China

To overcome the inherent deficiencies of conventional timefrequency analysis (TFA) methods, i.e., different TFA methods or the same TFA method with different control parameters will present different results for the same target signal, a novel scheme named as the timefrequency data fusion (TFDF) is developed in this study by extending the idea of data fusion technique. By combining the results produced by two or more different TFA methods, the TFDF technique can present a more accurate timefrequency presentation for the target signal than what can be achieved by any individual TFA method. Therefore, the TFDF has potential to render a significantly improved timefrequency representation and greatly facilitates extracting timefrequency features of target signals. This will promote the applications of TFA in engineering practices and make TFA methods more acceptable to field engineers. The effectiveness of the TFDF technique is validated by three numerical case studies and the analysis of a rubbing-impact signal collected from a rotor test rig. © 2011 Elsevier Ltd. All rights reserved.

关键词： Wavelet transforms

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Study on residual vibration suppression for a flexible dual-manipulator

Study on residual vibration suppression for a flexible dual-...

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Mediterranean Conference on control and Automation (MED)

作者： Akira Abe Kohei Yoshida Department of Systems Information and Control Engineering Asahikawa National College of Technology Asahikawa Hokkaido Japan Department of Information System Engineering Asahikawa National College of Technology Asahikawa Hokkaido Japan

This paper presents a feedforward control technique for suppressing residual vibrations of a flexible dual-manipulator. To construct the mathematical model of the manipulator system accurately, the parameters of the equations of motion are experimentally identified. In the control technique, we express the joint angle by a cubic spline function, and then use a particle swarm optimization to find an optimal path. The optimal path thus obtained carries a minimum vibration requirement. The suppression of the residual vibrations of the flexible dual-manipulator can be accomplished by rotating the joint angle along the optimal path. The validity and effectiveness of the proposed vibration control scheme is substantiated by simulation and experimental results.

关键词： Vibrations Trajectory Joints Manipulators Planning Feedforward neural networks Mathematical model

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A design approach to building a pseudo-coherent high duty-cycle X- and Ka-band radar

A design approach to building a pseudo-coherent high duty-cy...

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International Crimean Conference on Microwave & Telecommunication Technology

作者： V.P. Dzyuba A.D. Dorichenko V.D. Yeryomka A.F. Zykov O.Ye. Malyovanyi L.P. Milinevskiy I.M. Mytsenko A.N. Piven' O.I. Prokopenko A.N. Roenko D.V. Roskoshnyi SE plant «Generator» 18 Novokonstantinovskaya Str.. Кyiv 04080 Ukraine SE «Kyiv state plant «Burevestnik» 2 Zdolbunivska Str. 02081 Ukraine O.Ya. Usykov Institute for Radiophysics and Electronics of NAS of Ukraine 12 Ac. Proskury Str. Kharkiv 61085 Ukraine The Department of Hybrid Modeling and Control Systems in Power Engineering of Pukhov Institute for Modeling in Energy Engineering NAS of Ukraine 15 Generala Naumova Str. Kyiv 03164 Ukraine Co Ltd. «Electrotekhnik- New Technology» 26/2 Melnitskaya Str. Odessa 65005 Ukraine Administration State Border Service of Ukraine 26 Volodymyrivska Str. Kyiv 01601 Ukraine Institute telecommunication system NTUU «KPI» 2 Industrial Lane Kyiv-56 03056 Ukraine

A nonconventional way of construction of two-frequency (X - and Ka-ranges) pseudo-coherent pulsed radar of high porosity is described. It is shown that the offered way can be applied both for creation of radar guidance systems of new generation in the millimeter range of wavelengths, and for modernization of operating pulsed radars of the centimeter range.

关键词： Radar Microwave oscillators Microwave technology Publishing Cathodes Communications technology Conference proceedings

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Beyond-the-horizon detection of the surface objects using the “Burevestnik ZG” radar

Beyond-the-horizon detection of the surface objects using th...

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International Crimean Conference on Microwave & Telecommunication Technology

One of the problems in the area of radio wave propagation and radar design is creation of radar facilities for navigation in the regions of the World Ocean with intensive shipping. Ukrainian radio-electronic industry has a large experience in development of different purpose radar systems, one of that is the radar . This radar is used to control and observe marine surface situation on the naval border check-points of Ukraine. In the paper it is suggested to modernize radar for navigation and beyond-the-horizon detection of the surface objects. The possibilities of effective application for beyond-the-horizon detection of the surface objects in the districts of the World Ocean are estimated. To illustrate the latter the centimeter radio waves attenuation factor database, created in IRE NASU on the base of experimental results, is used. Statistical distribution functions of the radar coverage range in the districts of the World Ocean are determined. Comparison with experimental data for stationary navigation radars , and is conducted. Finally a conclusion, that radar can be used in the regions of the World Ocean for navigation and beyond-the-horizon detection of the surface objects, is made.

关键词： Radar Sea surface Radio navigation Surface waves Terrestrial atmosphere Generators

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