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CES/IEEE 5th International Power Electronics and Motion control Conference

作者： Panom Petchjatuporn Noppadol Khaehintung Khamron Sunat Phaophak Sirisuk Wiwat Kiranon Dept. of Control and Instrumentation Engineering Faculty of Engineering Dept. of Control and Instrumentation Engineering Faculty of Engineering Dept. of Computer Engineering Faculty of Engineering Dept. of Computer Engineering Faculty of Engineering Dept. of Telecommunication Engineering Faculty of Engineering Mahanakorn University of Technology Bangkok THAILAND 10530

This paper presents the development of an intelligent genetic algorithm (GA) technique for training of a generalized regression neural network (GRNN) controller to achieve a compact network and to decrease battery charging time on a cost-effective RISC microcontroller. The suitable input-output data were selected from GA mechanism to establish GRNN. The computational complexity of GRNN can be reduced replaced by some simple polynomial forms. As a consequence, the fast charging device for Nickel-Cadmium (Ni-Cd) batteries can be efficiently implemented on a low-cost 16F876A RISC microcontroller. Experimental results are shown to demonstrate superiority of the proposed system.

关键词： RISC microcontroller genetic algorithm fast charging the generalized regression neural network radial basis functions

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A novel approach to automatic music composing: Using genetic algorithm

A novel approach to automatic music composing: Using genetic...

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International computer Music Conference, ICMC 2006

作者： Zad, Damon Daylamani Araabi, Babak N. Lucas, Caru Department of Information Systems and Computing Brunel University United Kingdom Dept. of Electrical and Computer Engineering Control and Intelligent Processing Center of Excellence University of Tehran Iran

Artificial music composition is one of the ever rising problems of computer science. Genetic Algorithm has been one of the most useful means in our hands to solve optimization problems. By use of precise assumptions and adequate fitness function it is possible to change the music composing into an optimization problem. This paper proposes a new genetic algorithm for composing music. Considering entropy of the notes distribution as a factor of fitness function and developing mutation and crossover functions based on harmonic rules and trying to keep the melodies intact during these processes would result in a musical piece pleasant to human ears and interesting for human mind. This algorithm does not have the constraints of the previous algorithms. Restraining mutation and crossover functions with a goal of producing melodies based on acceptable melodies composed by humans, this algorithm is not bound to any genre, instrument or melody. The experimental results of this approach show that it is near to the human composing and the results produced from it are more acceptable than the ones produced by its predecessors.

关键词： Genetic algorithms

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A low-power 64-point FFT/IFFT design for IEEE 802.11a WLAN application

A low-power 64-point FFT/IFFT design for IEEE 802.11a WLAN a...

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ISCAS 2006: 2006 IEEE International Symposium on Circuits and Systems

作者： Lin, Chin-Teng Yu, An-Chu Van, Lan-Da Dept. of Electrical and Control Engineering National Chiao Tung University Hsinchu 300 Taiwan Department of Computer Science National Chaio Tung University Hsinchu 300 Taiwan

ISBN: (纸本)0780393902

In this paper, we propose a cost-effective and low-power 64-point fast Fourier transform (FFT)/inverse FFT (IFFT) architecture and chip adopting the retrenched 8-point FFT/IFFT (R8-FFT) unit and an efficient data-swapping method based output buffer unit The whole chip systematic performance concerning about the area, power, latency and pending cycles for the application of IEEE 802.11a WLAN standard has been analyzed. The proposed R8-FFT unit utilizing the symmetry property of the matrix decomposition achieves half computation-complexity and less power consumption compared with the recently proposed FFT/IFFT designs. On the other hand, applying the proposed data-swapping method, a low-cost and low-power output buffer can be obtained. So as to further increase system performance, we propose one scheme: the multiplication-afler-write (MAW) method. Applying MA W method with R8-FFT unit, the resulting FFT/IFFT design not only leads to the balancing pending cycle, but also abbreviating computation latency to 8 clock cycles. Consequently, adopting the above proposed two units and one scheme, the whole chip consumes 22.36mW under 1.2V@20 MHz in TSMC 0.13 1P8M CMOS process. © 2006 IEEE.

关键词： Fast Fourier transforms

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Sagnac quantum key distribution using novel polarization-insensitive phase modulators based on frequency shift

Sagnac quantum key distribution using novel polarization-ins...

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2006 LEOS Summer Topical Meetings

作者： Huang, Lei-Lei Qi, Bing Mong, Roger Qian, Li Lo, Hoi-Kwong Dept. of Electrical and Computer Engineering Center for Quantum Information and Quantum Control University of Toronto Toronto M5S 3G4 Canada

We demonstrate a stable Sagnac quantum key distribution implementing BB84 phase-encoding protocol based on acousto-optic frequency shifters. The quantum bit error rate remains 4-6.5% for at least one hour without reca... 详细信息

ISBN: (纸本)1424400902

关键词： Quantum cryptography

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Online computing model of temperature field of turbine rotor

Online computing model of temperature field of turbine rotor

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2006 ASME Power Conference

作者： He, Qing Du, Dongmei Chen, Yuesheng Key Laboratory of Condition Monitoring and Control for Power Plant Equipment Ministry of Education Dept. of Power Engineering Beijing 102206 China Dept. of Computer Science and Technology North China Electric Power University Beijing 102206 China

ISBN: (纸本)0791837769

Computation of temperature field of turbine rotor is a two-dimension axisymmetric problem. A two-dimension computing model of rotor temperature field is obtained by the analysis and simplification of rotor geometry structure and boundary conditions. The finite difference method is used to compute two-dimension temperature field of turbine rotor in this paper, which has enough precision and low amount of computation for online monitoring. By simplifying the structure and boundary conditions of turbine rotor, the fifteen node types of rotor are obtained. The difference calculating formulas for all node types are given. According to the model and difference formulas, an online computing program of temperature field of turbine rotor has been developed and applied to a 200MW turbine. Color cloud picture of temperature field of turbine rotor is released online via Internet. Copyright © 2006 by ASME.

关键词： Rotors

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An intelligent tutoring system based on a domain ontology for the design of lead-lag controllers

An intelligent tutoring system based on a domain ontology fo...

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作者： García, Isaías Benavides, Carmen Villar, José R. Rodríguez, Francisco Aláiz, Héctor Alonso, Ángel Systems Engineering and Control Group Dept. of Electrical and Electronic Engineering University of León Edificio Tecnológico Campus de Vegazana S/n 24071 León Spain Computer Science and Artificial Intelligence Group Dept. of Computer Science Campus de Viesques S/n 33204 Gijón Asturias Spain

ISBN: (纸本)9783902661074

The modeling of domains is today a technique with growing acceptance into the software community. Domain models allow the information to be represented in the computer at higher abstraction levels than in the usual applications, so improving the human to machine and machine to machine interactions. This paper deals with the application of such modeling paradigm to the control engineering education field, showing how the knowledge of this domain can be represented in a conceptual structure called ontology which is used as the base for building an Intelligent Tutoring System, a software tool used in the emerging field of e-learning. Copyright © 2006 IFAC.

关键词： Ontology

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Cutting mechanism of drilling CFRP laminates and effect of ultrasonic torsional mode vibration cutting

Cutting mechanism of drilling CFRP laminates and effect of u...

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34th North American Manufacturing Research Conference

作者： Yagishita, H. Dept. of Control and Computer Engineering Head of Cooperative Research and Development Center Numazu National College of Technology 3600 Ooka Numazu-city Shizuoka-pref. 410-8501 Japan

ISBN: (纸本)0872638480

Cutting mechanism of drilling CFRP laminates and effects of ultrasonic torsional mode vibration cutting were investigated. CFRP laminates are made of carbon fiber reinforced/epoxy-resin matrix composite plies. Challenges in drilling CFRP laminates arise because of anisotropy due to carbon fiber orientation. Experimental works were performed to characterize major hole quality parameters and cutting characteristics encountered when conventional drilling CFRP laminates. Shallow craters of about 50-70μm dept. were found at the particular position of inner surface in drilled hole and the reason of the growth of crater was investigated based on cutting mechanism of anisotropic composite material. In order to improve hole quality and tool life the specific drilling assisted by ultrasonic torsional mode vibration of 27 kHz was examined. The ultrasonic torsional mode vibration cutting was significantly effective to restrain the generation of the crater and also to elongate tool life about five times in drilling CFRP laminates.

关键词： Laminated composites

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On probing signal design for MIMO radar

On probing signal design for MIMO radar

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40th Asilomar Conference on Signals, Systems, and computers, ACSSC '06

作者： Li, Jian Stoica, Petre Xie, Yao Dept. of Electrical and Computer Engineering University of Florida P O. Box 116130 Gainesville FL 32611 United States Dept. of Information Technology Systems Control Division Uppsala University P.O. Box 337 SE-75105 Uppsala Sweden

ISBN: (纸本)1424407850

A MIMO (multi-input multi-output) radar system, unlike a standard phased-array radar, can choose freely the probing signals transmitted via its antennas to maximize the power around the locations of the targets of interest, or more generally to approximate a given transmit beampattern, and also to minimize the cross-correlation of the signals reflected back to the radar by the targets of interest. In this paper, we show how the above desirable features can be achieved by designing the covariance matrix of the probing signal vector transmitted by the radar. Moreover, in a numerical study, we show that the proper choice of the probing signals can significantly improve the performance of adaptive MIMO radar techniques. Additionally, we demonstrate the advantages of several MIMO transmit beampattern designs, including a beampattern matching design and a minimum sidelobe beampattern design, over their phased-array counterparts.

关键词： Covariance matrix

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A DATA-BASED MEASURE FOR INTERACTIONS IN MULTIVARIATE SYSTEMS

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IFAC Proceedings Volumes 2006年第2期39卷 681-686页

作者： M. Rossi A.K. Tangirala S.L. Shah C. Scali Computer Process Control Lab Dept. of Chemical Engineering University of Pisa Pisa Italy Dept. of Chemical Engineering IIT Madras Chennai India Department of Chemical & Materials Engineering - University of Alberta Edmonton Canada

This article focusses on the control loop performance diagnosis of a multivariate system with emphasis on the presence of interactions and poor performance of control loops. The paper provides a data-driven technique to determine if a decentralized PI(D) + controller will suffice or if an advanced controller ( e.g. , MPC) is necessary to handle the control interactions and improve the loop performance. Two different techniques are proposed: the first one, based on the Power Spectrum of the error, analyzes interactions in the frequency domain, while the second one, based on the evaluation of a modified IAE (Integral of Absolute Error), analyzes interactions in the time domain. A performance index for the controller is also proposed for the case of set-point tracking. Simulation and experimental case studies are presented to highlight the applicability of the proposed techniques.

关键词： Interactions MIMO systems frequency domain time domain

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Modified Smith Predictor and controller for time-delay process with uncertainty

Modified Smith Predictor and controller for time-delay proce...

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6th World Congress on Intelligent control and Automation, WCICA 2006

作者： Wang, Shihua Xu, Bugong Wang, Qingyang Liu, Yun-Hui Lab. of Real-Time Control Through Internet and Fieldbuses College of Automation Science and Engineering South China Univ. of Technology Guangzhou 510640 China Dept. of Automation and Computer Aided Engineering Chinese University of Hong Kong Shatin NT Hong Kong

ISBN: (纸本)1424403324

Smith Predictor is very sensitive to uncertain system with variable time-delay. Using dual-locus diagram method, we first analyse the essence of Smith Predictor's sensitivity and present a proposition to illustrate the system stability criteria with relation to system gain and time-delay variation. Then a new modified Smith Predictor is proposed to compensate the variable time-delay system with uncertain model for set-point tracking. After that, we discuss the system internal stability and give two-degree freedom controller self-adaptive to eliminate the impact of system uncertainty with varying time-delay. Examples show the improved performance compared to previous Modified Smith Predictor structures. © 2006 IEEE.

关键词： Uncertain systems

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