检索结果-内蒙古大学图书馆

2007 International Conference on Power electronics and Drive Systems (PEDS 2007), vol.2

作者： P. Somsiri P. Champa P. Wipasuramonton K. Tungpimonrut P. Aree Department or Electrical Engineering Thammasat University Thailland Industrial Control and Automation Lab National Electronics and Computer Technology Center Thailand

This paper presents a simple method to determine the initial rotor position of a three-phase star-connected switched reluctance machine (SRM) at standstill without position and current sensors. The principle of the initial rotor position estimation is based on the stator inductance variation related to the actual rotor position. In the proposed method, only two narrow voltage pulse injections are applied in sequence. In this method the machine parameters and phase current detection are not required. The method is suitable for low-cost SRM-drive applications. The experimental results were carried out on a 6/4 poles three-phase SRM and show the satisfactory accuracy of the proposed initial rotor position estimation.

关键词： Switched reluctance motor Rotor position estimation Standstill

来源：评论

学校读者我要写书评

暂无评论

A Design of 15 kW Switched Reluctance Motor for Electric Vehicle Applications

A Design of 15 kW Switched Reluctance Motor for Electric Veh...

引用

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

作者： P. Jitkreeyarn K. Tungpimolrut S. Kachapornkul P. Somsiri Tadashi Fukao Akira Chiba Industrial Control and Automation Laboratory Section National Electronics and Computer Technology C Department of Electrical Engineering Faculty of Science and Technology Tokyo University of Science

In this paper, a design of the 3-phase, 6-stator-pole and 4-rotor-pole, 15 kW switched reluctance motor for the propulsion system of the electric vehicle is presented. Its performance such as the torque per volume and... 详细信息

关键词： Switched reluctance motor motor design electric vehicle

来源：评论

学校读者我要写书评

暂无评论

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

引用

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

来源：评论

学校读者我要写书评

暂无评论

Approximation and Optimization of L1-norm for Continuous-Time Linear Systems

Approximation and Optimization of L1-norm for Continuous-Tim...

引用

World Congress on Intelligent control and automation (WCICA)

作者： Xiajiao Wang Jun Wu Weihua Xu Sheng Chen Xiaoliang Wang National Laboratory of Industrial Control Technology Institute of Advanced Process Control University of Zhejiang Hangzhou China Department of Electronics and Computer Science University of Southampton Southampton UK Department of Electronics College of Information Science and Technology Jinan University Guangzhou China

A method is derived to approximate the L 1 -norm of continuous-time linear time-invariant systems. The optimization problem is then formulated to design fixed-order L 1 -controller. The method of approach and simulate... 详细信息

关键词： Linear systems industrial electronics Simulated annealing Laboratories industrial control Process control Educational institutions Information science Design optimization control system synthesis

来源：评论

学校读者我要写书评

暂无评论

Optimal controller Realisations with the Smallest Dynamic Range

Optimal Controller Realisations with the Smallest Dynamic Ra...

引用

IEEE Conference on Decision and control

作者： Jun Wu Sheng Chen Gang Li Jian Chu National Key Laboratory of Industrial Control Technology Institute of Advanced Process Control University of Zhejiang Hangzhou China School of Electronics and Computer Science University of Southampton UK School of Electrical and Electronic Engineering Nanyang Technological University Singapore

ISBN: (纸本)1424401704;9781424401703

An approach is proposed to design optimal finite word length (FWL) realisations of digital controllers implemented in fixed-point arithmetic. A minimax-based search procedure is first used to obtain an optimal controller realisation that optimises an FWL closed-loop stability measure. Since this FWL closed-loop stability measure is solely linked to the fractional part or precision of fixed-point format, the resulting realisation may not have the smallest dynamic range. A measure is derived to indicate the dynamic range of a realisation. Based on an orthogonal transformation of this dynamic range measure for the optimal precision controller realisation, a numerical optimisation method is developed to make the controller realisation having the smallest dynamic range without sacrificing FWL closed-loop stability robustness

关键词： Optimal control Dynamic range Robust stability Digital control Robust control USA Councils Fixed-point arithmetic Optimization methods Design optimization Laboratories

来源：评论

学校读者我要写书评

暂无评论

Simulation method of transmission-type Radio-Frequency Single-Electron Transistor (RF-SET) by SPICE

Simulation method of transmission-type Radio-Frequency Singl...

引用

IEEE Nanotechnology Materials and Devices Conference (NMDC)

作者： YunSeop Yu Jung Hyun Oh Seung Hun Son Bum Ho Choi SungWoo Hwang Doyeol Ahn Department of Information & Control Engineering Hankyong National University Ansung Gyeonggi South Korea Department of Computer & Electronics Engineering Korea University Seoul South Korea Institute of Quantum Information Processing & Systems University of Seoul Seoul South Korea Gwangju Research Center Korea Institute of Industrial and Technology Gwangju South Korea

An efficient simulation method for transmission-type radio-frequency single-electron transistors (RF-SETs) is developed. By introducing equivalent circuits of propagating microwaves through RF cables, we solve the master equation for RF-SETs self-consistently by using the conventional circuit simulator SPICE including the SET current model. By examining transmitted waves from the transmission-type RF-SET, we show that the developed method successfully reproduces the numerical reference methods (calculated self-consistently). We also show that our method provides simple and fast ways to simulate the RF-SETs even under complicated circuit geometry and in high frequencies over GHz.

关键词： Radio frequency Single electron transistors SPICE Circuit simulation Equivalent circuits Microwave propagation Cables Equations Microwave circuits Solid modeling

来源：评论

学校读者我要写书评

暂无评论

Fabrication and characterization of GaAs/AlGaAs planar resonant tunneling transistor

Fabrication and characterization of GaAs/AlGaAs planar reson...

引用

IEEE Nanotechnology Materials and Devices Conference (NMDC)

作者： SeungHun Son JungIl Lee YongJu Park YunSeop Yu SungWoo Hwang Doyal Ahn Departmentof Electronics & Computer Engineering Korea University Seoul South Korea Semiconductor Materials Laboratory Nano Device Research Center Korea Institute of Science and Technology Seoul South Korea Department of Information & Control Engineering Hankyong National University Anseong Gyeonggi South Korea Institute of Quantum Information Processing & Systems University of Seoul Seoul South Korea

We have demonstrated electron transport in enhancement mode in-plane-gate (IPG) quantum dot (QD) transistors. A deep etched trench allows a large positive bias on the IPG, with negligible leakage current. Such enhancement mode operation has made it possible to populate ultra-small QDs with electrons. Strong NDR peaks and SET are observed in a wide gate bias window. The position of the NDR peaks systematically moves with the change of gate bias until, and also after the SET regime is reached. The size of the QD is estimated from the SET data, giving quantum energy level spacing consistent with the evolved NDR positions.

关键词： Fabrication Gallium arsenide Resonant tunneling devices Capacitance Quantum computing Electrons Etching Transistors Quantum dots Energy states

来源：评论

学校读者我要写书评

暂无评论

Application layer error correction scheme for video header protection on wireless network

Application layer error correction scheme for video header p...

引用

IEEE International Symposium on Multimedia

作者： Chia-Ho Pan I-Hsien Lee Sheng-Chieh Huang Chih-Chi Cheng Chung-Jr Lian Liang-Gee Chen DSP/IC Design Laboratory Graduate Institute of Electronics Engineering and Department of Electrical Engineering National Taiwan University Taipei Taiwan Computer & Communications Research Laboratories Industrial Technology and Research Institute Hsinchu Taiwan Electrical and Control Engineering National Chiao Tung University Hsinchu Taiwan

In wireless video streaming application, video information may be corrupted by a noisy channel. By introducing error resilience and error concealment techniques, many researchers have tried to eliminate quality degradation of reconstructed picture in decoding a corrupted data. On the contrary, there are relatively fewer works discussing the ways to diminish the corruption. Hence, system designers need to use different methods to restrict the error cause by channel within a tolerable extent. In other words, the system will be difficult to be implemented in practical design. In this paper, we propose a way to protect the video header information in application layer without modifying standardized syntax. Beside, we also consider channel condition of wireless transmission and propose a way to reduce redundant bits used in channel coding. By doing this, the bitstream can be simply transmitted over practical wireless network and the reconstructed picture quality outperforms the original one.

关键词： Error correction Protection Wireless networks Decoding Video compression Forward error correction Cyclic redundancy check Wireless personal area networks Streaming media computer errors

来源：评论

学校读者我要写书评

暂无评论

Computing a FWL stability measure for second order digital systems

Computing a FWL stability measure for second order digital s...

引用

International Conference on control, automation, Robotics and Vision (ICARCV)

作者： J. Wu S. Chen J. Chu National Key Laboratory of Industrial Control Technology Institute of Advanced Process Control University of Zhejiang Hangzhou China Department of Electronics and Computer Science University of Southampton Highfield Southampton UK National Key Laboratory of Industrial Control Technology Institute of Advanced Process Control Zhejiang University Hangzhou China

The best measure quantifying FWL (finite word length) stability is the one that bases on the largest stable perturbation hypercube. But the computing of this FWL stability measure has not been solved. For second order digital systems, this paper develops an analytic computing method. Through solving 12 linear equations and 12 quadratic equations, the measure value can be obtained exactly.

关键词： Stability Digital systems control systems industrial control Laboratories Process control Equations Digital filters Digital control Eigenvalues and eigenfunctions

来源：评论

学校读者我要写书评

暂无评论

Optimization of block-floating-point realizations for digital controllers with finite-word-length considerations

引用

Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2003年第6期4卷 30-36页

作者：吴俊胡协和陈生褚健 Department of Electronics and Computer Science Zhejiang University Southampton SO17 1BJ National Key Laboratory of Industrial Control Technology National Key Laboratory of Industrial Control Technology Institute of Advanced Process Control China Hangzhou 310027 UK University of Southampton

The closed loop stability issue of finite precision realizations was investigated for digital controllers implemented in block floating point format. The controller coefficient perturbation was analyzed resulting from using finite word length (FWL) block floating point representation scheme. A block floating point FWL closed loop stability measure was derived which considers both the dynamic range and precision. To facilitate the design of optimal finite precision controller realizations, a computationally tractable block floating point FWL closed loop stability measure was then introduced and the method of computing the value of this measure for a given controller realization was developed. The optimal controller realization is defined as the solution that maximizes the corresponding measure, and a numerical optimization approach was adopted to solve the resulting optimal realization problem. A numerical example was used to illustrate the design procedure and to compare the optimal controller realization with the initial realization.

关键词： Digital controller Finite word length Block floating point Closed loop stability Optimization

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：