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2010 49th IEEE Conference on Decision and control

作者： B. Boulkroune M. Galvez-Carrillo M. Kinnaert Dept. of Control Engineering and System Analysis Universite Libre de Bruxelles (ULB) CP 165/55 50 Av. F.D. Roosevelt 1050 Brussels Belgium

ISBN: (纸本)9781424477456

The problem of multiplicative fault detection and isolation (FDI) in the current sensors of a doubly-fed induction generator (DFIG) is considered in the presence of model uncertainty. A residual generator based on the DFIG model is proposed using the structure of the classical generalized observer scheme (GOS). However, each observer in this scheme is replaced by a robust H_(-)/H_(infinity) fault detection filter followed by a Kalman-like observer. It turns out that the fault detection/isolation problem then amounts to detecting the appearance of sine waves superimposed to specific components of a white noise vector. A Generalized Likelihood Ratio Test (GLRT) is developed to solve the problem. The complete FDI system is validated through simulations on a controlled DFIG.

关键词： Defect detection Induction generators model uncertainty doubly-fed double-fed induction generator Current sensors

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Robust Sliding Mode control for a Wind Turbine system

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IFAC Proceedings Volumes 2010年第1期43卷 7-12页

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

The actual wind turbines are provided with adjustable speed generators, like the double feed induction generator, that are capable to work in variable speed operations. One of the main advantage of adjustable speed generators is that they improve the system efficiency compared to fixed speed generators because turbine speed is adjusted as a function of wind speed to maximize output power. However this systems requires a suitable speed controller in order to track the optimal wind turbine speed reference. In this work, it is proposed a sliding mode control for variable speed wind turbines. The robustness analysis of the proposed controller under disturbances and parameter uncertainties is provided using the Lyapunov stability theory and simulated results show that the proposed controller provides a good performance.

关键词： Variable Structure control Wind Turbine Double Feed Induction Generator Robust control.

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Design of Sliding Mode Observers for TS Fuzzy systems with Application to Disturbance and Actuator Fault Estimation

Design of Sliding Mode Observers for TS Fuzzy Systems with A...

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2010 49th IEEE Conference on Decision and control

作者： Patrick Gerland Dominic Gross Horst Schulte Andreas Kroll Institute of Measurement and Control Dept. of Mechanical Engineering University of Kassel (Germany) Institute of Control and System Theory Dept. of Electrical Engineering University of Kassel (Germany) Faculty of Electrical Engineering and Automation University of Applied Science Berlin (Germany)

ISBN: (纸本)9781424477456

In this paper an observer-based fault detection approach for a class of nonlinear systems, which can be modeled by Takagi-Sugeno (TS) fuzzy models, is presented. We propose a sliding mode fuzzy observer that deals with unmeasurable premise variables, bounded uncertainties in the plant and allows fault estimation based on an equivalent output error injection approach. Necessary conditions for the existence of the robust observer are derived from sliding mode theory [10]. Stability is ensured by linear matrix inequality (LMI) based sufficient conditions. An illustrative example demonstrates the effectiveness of the proposed scheme.

关键词： sliding mode observer Sliding mode disturbance Fuzzy systems Defect detection transport stream actuators fuzzy observer

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Assessment to application of 4S nuclear design methodology through physics benchmark analyses for leakage dominant cores

Assessment to application of 4S nuclear design methodology t...

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International Congress on Advances in Nuclear Power Plants 2010, ICAPP 2010

作者： Kawashima, M. Tsuboi, Y. Nagata, A. Moriki, Y. Nuclear Technology Application Dept. Toshiba Nuclear Engineering Services Corporation 8 Shinsugita-Cho Isogo-Ku Yokohama 235-8523 Japan Advanced Energy Design and Engineering Dep. Toshiba Corporation 8 Shinsugita-Cho Isogo-Ku Yokohama 235-8523 Japan Nuclear System Analysis Technology R and D Dept. Power and Industrial Systems R and D Center Toshiba Corporation 8 Shinsugita-Cho Isogo-Ku Yokohama 235-8523 Japan

ISBN: (纸本)9781617386435

This paper discussed neutronic similarity for reflector worth and sodium void worth between the 4S core and one of physics benchmark core FCA XXIII from macroscopic and microscopic view points using perturbation theory. The comparison showed that similarities of reactivity components for reflector worth and sodium void worth mostly maintained although some differences exist in core size and compositions between the two cores. Adequacy of the 4S nuclear design methodology is also confirmed through assessment of the analysis results of the FCA-XXIII cores. The confirmed methodology will be further applied in the 4S core design.

关键词： Sodium

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Hybridization approach of plant models for enhancing ship electrical system analysis

Hybridization approach of plant models for enhancing ship el...

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Electrical systems for Aircraft, Railway and Ship Propulsion

作者： R. Iza E. Irigoyen V. Gómez F. Artaza H. Etxebeste INGETEAM MARINE Zamudio Spain System Engineering and Automation Department Control Intelligent Research Group University of Basque Country (UPV-EHU) Bilbao Spain System Engineering and Automation Dept. University of the Basque Country Bilbao Spain

This work presents a Hybrid Model Library (HML) for enhancing the analysis of ship electrical systems. Lots of studies were made in order to select the most appropriated software platform to test the new models developed. This work shows examples of models developed in Simulink-MATLAB and PSIM platforms. Later on, we present a research methodology based on modeling techniques by hybridization. Several modeling stages will be presented in order to clarify what kind of difficulties has been solved during marine plant models designing. Finally, we present some conclusions about the HML developed and the chances to improve its core.

关键词： Load modeling Analytical models Marine vehicles Libraries Propulsion Software control systems

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Single channel speech separation with a frame-based pitch range estimation method in modulation frequency

2010 5th International Symposium on Telecommunications, IST ...

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2010 5th International Symposium on Telecommunications, IST 2010 2010年 609-613页

作者： Mahmoodzadeh, A. Abutalebi, H.R. Soltanian-Zadeh, H. Sheikhzadeh, H. Speech Proc. Research Lab. ECE Dept. Yazd University Iran Control and Intelligent Processing Center of Excellence University of Tehran Iran EE Dept. Amirkabir University of Technology Tehran Iran Idiap Research Institute Martigny Switzerland Image Analysis Lab. Henry Ford Health System Detroit United States

ISBN: (纸本)9781424481835

Computational Auditory Scene analysis (CASA) has attracted a lot of interest in segregating speech from monaural mixtures. In this paper, we propose a new method for single channel speech separation with frame-based pitch range estimation in modulation frequency domain. This range is estimated in each frame of modulation spectrum of speech by analyzing onsets and offsets. In the proposed method, target speaker is separated from interfering speaker by filtering the mixture signal with a mask extracted from the modulation spectrogram of mixture signal. systematic evaluation shows an acceptable level of separation comparing with classic methods. © 2010 IEEE.

关键词： Frequency estimation

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Determination of pitch range based on onset and offset analysis in modulation frequency domain

2010 5th International Symposium on Telecommunications, IST ...

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2010 5th International Symposium on Telecommunications, IST 2010 2010年 604-608页

作者： Mahmoodzadeh, A. Abutalebi, H.R. Soltanian-Zadeh, H. Sheikhzadeh, H. Speech Proc. Research Lab. ECE Dept. Yazd University Yazd Iran Control and Intelligent Processing Center of Excellence University of Tehran Tehran Iran EE Dept. Amirkabir University of Technology Tehran Iran Idiap Research Institute Martigny Switzerland Image Analysis Lab. Henry Ford Health System Detroit United States

ISBN: (纸本)9781424481835

Auditory scene in a natural environment contains multiple sources. Auditory scene analysis (ASA) is the process in which the auditory system segregates a scene into streams corresponding to different sources. The determination of range of pitch frequency is necessary for segmentation. We propose a system to determine the range of pitch frequency by analyzing onsets and offsets in modulation frequency domain. In the proposed system, first the modulation spectrum of speech is calculated and then, in each subband onsets and offsets will be detected. Thereafter, the segments are generated by matching corresponding onset and offset front. Finally, by choosing the desired segments, the rage of pitch frequency is determined. systematic evaluation shows that the range of pitch frequency is estimated with good accuracy. © 2010 IEEE.

关键词： Frequency modulation

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Fundamental modeling of vehicle power network system using VHDL-AMS

Fundamental modeling of vehicle power network system using V...

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2010 International Symposium on Power Electronics, Electrical Drives, Automation and Motion, SPEEDAM 2010

作者： Ueno, Shingo Tsuji, Kimitoshi Abe, Takashi Higuchi, Tsuyoshi Shigematsu, Koichi Dept. of Electrical and Electronic Engineering Nagasaki University 1-14 Bunkyo-machi Nagasaki 852-8521 Japan Advanced Vehicle Control System Eng. Dev. Toyota Motor Corp. 1200 Mishuku Susono Shizuoka 410-1193 Japan Cybernet Systems Co. Ltd. Fujisoft Bldg. 6-26 Nishiki 1-Chome Naka-ku Nagoya 460-0003 Japan

ISBN: (纸本)9781424449873

The vehicle system is a multi-domain system that requires many branches of science and engineering. Therefore the development of the vehicle system requires the use of design methodologies that utilize simulations, which have grown increasingly sophisticated in recent years. This paper describes how VHDL-AMS was used to model the powertrain, alternator and battery system that are the basic elements of the vehicle power network system, and examines the simulation results with the aim of realizing a system simulation whose scope covers the entire vehicle. © 2010 IEEE.

关键词： Electric power transmission networks

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Fault detection based on H_∞ states observer for networked control systems

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Journal of systems engineering and Electronics 2009年第2期20卷 379-387页

作者： Zhu Zhangqing Jiao Xiaocheng Dept. of Control and System Engineering Nanjing Univ. Nanjing 210093 P. R. China

The influence of random short time-delay to networked control systems （NCS） is changed into an unknown bounded uncertain part. Without changing the structure of the system, an Hoo states observer is designed for NCS with short time-delay. Based on the designed states observer, a robust fault detection approach is proposed for NCS. In addition, an optimization method for the selection of the detection threshold is introduced for better tradeoff between the robustness and the sensitivity. Finally, some simulation results demonstrate that the presented states observer is robust and the fault detection for NCS is effective.

关键词： networked control systems fault detection states observers time-delays robustness

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A Carrier Recovery Algorithm for High Order QAM Signals

A Carrier Recovery Algorithm for High Order QAM Signals

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International Conference on Wireless Communications, Networking and Mobile Computing (WiCom)

作者： Wei Xue Xiaoniu Yang Zhaoyang Zhang Department of Information Science and Electronic Engineering Zhejiang Uinversity Hangzhou Zhejiang China National Laboratory of Information Control Technology for Communication System Jiaxing Zhejiang China Dept. of Inf. Sci. & Electron. Eng. Zhejiang Uinversity Hangzhou China

The carrier recovery is one key technique in the demodulation of high order quadrature amplitude modulation (QAM) signals. A carrier recovery algorithm which switches between multi-threshold polarity decision mode and decision directed mode according to the standard deviation of the frequency of numerically controlled oscillator (NCO) is proposed. The proposed algorithm can detect a proper time for the mode switch to yield lower steady state error. The simulation results demonstrate the effectiveness of the proposed algorithm in improving the performance of blind carrier recovery.

关键词： Phase locked loops Quadrature amplitude modulation Steady-state Detectors Signal processing algorithms Constellation diagram Simulation

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