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SHORT TERM ELECTRIC LOAD FORECAST WITH ARTIFICIAL NEURAL NETWORKS

IFAC Proceedings Volumes 2007年第18期40卷 443-449页

作者： Vasar Cristian Szeidert Iosif Filip Ioan Prostean Gabriela Department of Control System Engineering “Politehnica” University from Timisoara Faculty of Automation and Computer Science 300223 Timisoara Romania Phone: (+40) 256-403237 E-Mail: cristian.vasar@aut.upt.ro

This paper presents issues regarding short term electric load forecasting using feedforward and Elman recurrent neural networks. The study cases were developed using measured data representing electrical energy consume from Banat area. There were considered 35 different types of structure for both feedforward and recurrent network cases. For each type of neural network structure were performed many trainings and best solution was selected. The issue of forecasting the load on short term is essential in the effective energetic consume management in an open market environment.

关键词： neural networks prediction problems load forecasting feedforward networks simulation

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ML DESIGNERTM as simulation tool in robotics

ML DESIGNERTM as simulation tool in robotics

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International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Service (TELSIKS)

作者： Mario Schulz Ivan Velickovic Sasa Andelkovic Volker Zerbe Goran S. Dordevic Computer Science and Automation Faculty System and Control Theory Department Technical University Ilmenau Ilmenau Germany Faculty of Electronics engineering Robotics Lab University of Nis Nis Serbia

Robots are complex systems that require multidisciplinary approach to development. Hence, both research and production of a robotic system require a tool that would provide means for coordination between teams with different areas of expertise as well as the ability to integrate, simulate and debug the system in a comprehensive way. Also, with the growing popularity of service robotics, research and modeling of human-machine interaction gains the attention. From a simulation tool, it is expected to support the means for describing this interaction. For that purpose we are investigating the ML Designer TM , not just as a possible simulation tool, but also as a modeling and design paradigm. For verification purposes we will compare it against MATLAB Simulink TM . A pneumatic system will be modeled with both tools and a comparison will be performed.

关键词： Mathematical model Robot kinematics Cleaning system testing Power system modeling MATLAB Pneumatic systems control systems Level control Costs

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Luminance Uniformity Compensation for Color Organic Light Emitting Diode Panel

Luminance Uniformity Compensation for Color Organic Light Em...

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2007亚洲显示国际会议

作者： Ming-Jong Tsai Chien-Hui Chou Chang-Jung Juan S.Y.Yeh Chung-Yu Wu Graduate Institute of Automation and Control National Taiwan University of Science and Technology Taiwan China Graduate Institute of Automation and Control National Taiwan University of Science and Technology Taiwan China Department of Electronic Engineering Hwa Hsia Institute of Technology Taiwan China Graduate Institute of Automation and Control National Taiwan University of Science and Technology Taiwan China Graduate Institute of Automation and Control National Taiwan University of Science and Technology Taiwan China

This paper proposes a compensation mechanism to improve the display uniformity of color Organic Light Emitting Diode *** average luminance for 64 non-neighbor blocks of 4 by 4 pixels area are measured by a chroma *** using a linear interpolation method,the system computes the compensation factor of all unmeasured pixels inside the panel and stores the compensated data in Area Compensation Look-up table (ACLUT).Then,the actual output value was ob- tained by multiplying the original display by the calibrated *** using such a compensation mechanism,the lumi- nance uniformity of a color oled panel can be improved.A color OLED panel of 96×64 pixels was examined in this pa- *** the experimental results,the luminance uniformity is improved to over 92% in *** it proves that this method can effectively improve the non-uniform luminance which may be caused during the manufacturing process.

关键词： Organic Light Emitting Diode(OLED) Luminance Uniformity Chorma Meter Area Compensation Look Up Table(ACLUT)

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Proposal of VLIW Architecture for Application Specific Processors with Built-in-Self-Repair facility via Variable Accuracy Arithmetic

Proposal of VLIW Architecture for Application Specific Proce...

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IEEE Design and Diagnostics of electronic Circuits and systems (DDECS)

作者： Pawel Pawlowski Adam Dabrowski Mario Scholzel Chair of Control and System Engineering Division of Signal Processing and Electronic Circuits Poznań University of Technology Poznan Poland Department of Computer Science Brandenburg University of Technology Cottbus Germany

A new proposal of a very long instruction word (VLIW) architecture for application specific processors with the built-in-self-repair (BISR) facility realized by means of the variable accuracy arithmetic has been described in this paper. The proposed idea, which is particularly interesting for the portable embedded systems, is based on a novel two accumulator model, which is used in order to obtain high accuracy of the result of a series of floating-point additions. The goal of the proposed approach consists in ensuring the functionality of the system even in case of permanent faults of particular building blocks, e.g., of one of the floating point adders. Instead of decreasing the performance of the system or providing redundant hardware, as it is typically done in other approaches, in our present concept merely the accuracy of the floating point accumulation is reduced. Therefore, although the quality of service is reduced, the performance and the overall functionality of the system may remain unchanged. By this means we can also control the power consumption, saving the power with the cost of the somehow reduced signal processing accuracy.

关键词： Proposals VLIW Application specific processors Arithmetic Embedded system Hardware Quality of service Energy consumption Costs Signal processing

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A gain scheduled controller for sinusoidal ripple elimination of AC PM motor systems

A gain scheduled controller for sinusoidal ripple eliminatio...

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Mediterranean Conference on control and automation (MED)

作者： J. Wang W. C. Gan L. Qiu Department of Control Theory and Engineering Harbin Institute of Technology China ASM Assembly Automation Hong Kong Limited Hong Kong China Department of Electrical and Electronic Engineering Hong Kong University of Science and Technology Hong Kong China

An adaptive control algorithm for the elimination of torque and velocity ripples in the alternating current (AC) permanent magnet (PM) motor control systems is presented in this paper. A model of AC PM motor system includes n sinusoidal disturbances is first developed. The internal model principle (IMP) is then applied to design a controller to eliminate the torque and velocity ripples without estimating the amplitude and the phase values of the sinusoidal disturbances. Based on the IMP and the pole-zero placement technique, a gain scheduled (GS) robust two-degree-of-freedom (2DOF) speed regulator is developed to eliminate the torque and velocity ripples and to achieve a desirable tracking response. Using the small gain theorem, the system stability radius is obtained for n sinusoidal disturbances with slowly time-varying frequencies. The effectiveness of the proposed GS robust 2DOF speed regulator can be shown by the simulation results of an example with two sinusoidal disturbances.

关键词： control systems AC motors Permanent magnet motors Robustness Regulators Adaptive control Motor drives Torque control Velocity control Amplitude estimation

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Human Intention Extracted from Electromyography Signals for Tracking Motion of Meal Assistance Robot

Human Intention Extracted from Electromyography Signals for ...

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2007 IEEE/ICME International Conference on Complex Medical engineering-CME2007(CME2007 第二届国际复合医学工程学术大会)

作者： X. Zhang B. Wang X.Y. Wang T. Sugi M. Nakamura Department of Automation East China University of Science and Technology Shanghai 200237 P. R. Ch Department of Electrical and Electronic Engineering Saga University Department of Advanced Systems Control Engineering Saga University Saga 840-8502 Japan

The objective of the present study is to determine if surface electromyography (EMG) signals can be used for controlling the motion of the meal assistance robot. The power of four EMG channels were calculated and encoded into five commands to track the motion of meal assistance robot. The results indicated that by using EMG signals, the meal assistance robot was able to follow the movement desire of the subjects and help them to eat. This study has shown the possibility of extracting the features of EMG signals that reflect the subject's intent as control signals.

关键词： Humans Electromyography Tracking Robots Electrooculography Rehabilitation robotics Motion control control systems Feature extraction Muscles

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An Optimization Approach to Fuzzy Diagnosis: Oil Analysis Application

An Optimization Approach to Fuzzy Diagnosis: Oil Analysis Ap...

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IEEE International Conference on Fuzzy systems (FUZZ-IEEE)

作者： Antonio Sala Julio C. Ramirez Bernardo Tormos Manuel Yago Industrial Automation and Informatics Institute Systems Engineering and Control Department Universidad Politecnica de Valencia Spain Electronic Engineering Department Instituto Tecnologico de Nogales Mexico CMT Thermal Engines group Universidad Politecnica de Valencia Spain

This paper discusses a knowledge-base encoding methodology for diagnostic tasks. It transform "expert"-provided rules into algebraic expressions so inference of the "possible" disorders is carried out via associated constrained optimisation problems. In this way, the need of conventional fuzzy inference systems or "uncertain"-logic schemes is no longer present in the particular setting in this paper. An oil-analysis diagnosis case study is presented as an application example, with actual experimental data. The problem is solved by efficient linear programming tools, in principle able to cope with large-scale problems. The only software used was Mathematica reg 5.2.

关键词： Petroleum Optimization methods Encoding Logic Engines Electrical equipment industry Blood Constraint optimization Fuzzy sets Fuzzy systems

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A Study on Common-Mode Noise Generation in Switching Circuit due to Unbalanced Characteristic

A Study on Common-Mode Noise Generation in Switching Circuit...

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Power Conversion Conference

作者： T. Intachot W. Klungwijit Y. Prempraneerach S. Nitta Department of Control Engineering Faculty of Engineering King Mongkut''s Institute of Technology Ladkrabang Bangkok Thailand Department of Electronic Technology Faculty of Industrial Technology Valaya-Alongkorn Rajabhat University Pathum Thani Thailand Graduate School Production System Engineering Salesian Polytechnic Tokyo Japan

ISBN: (纸本)1424408431;9781424408436

General switching converter such as the simple high-side switching circuit inherently has unbalanced characteristics of impedance of transmission path, voltage at dc source and load terminals with respect to the frame ground. These unbalanced characteristic effects are the cause of unbalanced voltages at both dc source and load terminals. These unbalanced voltages will produce common-mode noise flowing through frame ground to the LISN during the active switch turn-off and on. This paper presents the analytical and experimental consideration of common-mode noise generation due to the unbalanced effect. The mechanism of common-mode noise generation due to unbalanced effect can be explained by equivalent circuit in both turn-off and turn-on time of the active switch. For common-mode noise reduction, the method for balancing the switching converter is also presented. Common-mode noise generated due to the effect of circuit imbalance is clarified by the experimental results. The balanced switching converter can greatly reduce the common-mode noise is also confirmed by the experimental results.

关键词： Circuit noise Noise generators Character generation Switching circuits Switches Switching converters Voltage Active noise reduction Noise reduction Impedance

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A Study On Iterative Learning control With Adjustment Of Learning Interval For Monotone Convergence In The Sense Of Sup-Norm

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Asian Journal of control 2008年第1期4卷

作者： Kwang-Hyun Park Zeungnam Bien Division of EE Department of EECS Korea Advanced Institute of Science and Technology 373–1 Kusong-dong Yusong-gu Taejon 305–701 Korea. Zeungname Bien:received the B.S. degree in electronics engineering from Seoul National University Seoul Korea in 1969 and the M.S. and Ph.D. degrees in electrical engineering from the University of Iowa Iowa City Iowa U.S.A. in 1972 and 1975 respectively. During 1976–1977 academic years he taught as assistant professor at the Department of Electrical Engineering University of Iowa. Then Dr. Bien joined Korea Advanced Institute of Science and Technology summer 1977 and is now Professor of Control Engineering at the Department of Electrical Engineering and Computer Science KAIST. Dr. Bien was the president of the Korea Fuzzy Logic and Intelligent Systems Society during 1990–1995 and also the general chair of IFSA World Congress 1993 and for FUZZ-IEEE99 respectively. He is currently co-Editor-in-Chief for International Journal of Fuzzy Systems (IJFS) Associate Editor for IEEE Transactions on Fuzzy Systems and a regional editor for the International Journal of Intelligent Automation and Soft Computing. He has been serving as Vice President for IFSA since 1997 and is now Chief Chairman of Institute of Electronics Engineers of Korea and Director of Humanfriendly Welfare Robot System Research Center. His current research interests include intelligent control methods with emphasis on fuzzy logic systems service robotics and rehabilitation engineering and large-scale industrial control systems. Kwang-Hyun Park:received the B.S. M.S. and Ph.D. degrees in electrical engineering and computer science from KAIST Korea in 1994 19997 and 2001 respectively. He is now a researcher at Human-friendly Welfare Robot System Research Center. His research interests include learning control machine learning human-friendly interfaces and service robotics.

It has been found that some huge overshoot in the sense of sup-norm may be observed when typical iterative learning control (ILC) algorithms are applied to LTI systems, even though monotone convergence in the sense of λ-norm is guaranteed. In this paper, a new ILC algorithm with adjustment of learning interval is proposed to resolve such an undesirable phenomenon, and it is shown that the output error can be monotonically converged to zero in the sense of sup-norm when the proposed ILC algorithm is applied. A numerical example is given to show the effectiveness of the proposed algorithm.

关键词： Iterative learning control monotone convergence learning interval sup-norm

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A New Approach of Thermal Power Plant Model Using VVVF Inverter for Accuracy Improvement

A New Approach of Thermal Power Plant Model Using VVVF Inver...

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International Conference on Electrical Machines and systems 2007(ICEMS2007)(第十届国际电机与系统会议)

作者： N. Matsui F. Kurokawa Chouryou Control System CO. LTD Japan Department of Electrical and Electronic Engineering Nagasaki University Japan

The purpose of this paper is to present a new approach of thermal power plant model for accuracy improvement in the dynamic characteristics. As a result, an error is less then 0.7％ in static characteristics and less then 3.4％ in dynamic characteristics simulation model differential of actual plant. This shows that the accuracy of the proposed model is three times as much as a standard one.

关键词： Power generation Inverters Boilers Fluid flow control Power system modeling Fuels Furnaces Combustion Temperature Ducts

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