检索结果-内蒙古大学图书馆

Input Design for Nonlinear Stochastic Dynamic Systems – A Particle Filter Approach

IFAC Proceedings Volumes 2011年第1期44卷 13191-13196页

作者： R. Bhushan Gopaluni Thomas B. Schön Adrian G. Wills Department of Chemical and Biological Engineering University of British Columbia Vancouver Canada V6T 1Z3 (Tel: 604 827 5668) Division of Automatic Control Linköping University SE-581 83 Linköping Sweden School of Electrical Engineering and Computer Science University of Newcastle Callaghan NSW 2308 Australia

Abstract We propose an algorithm for optimal input design in nonlinear stochastic dynamic systems. The approach relies on minimizing a function of the covariance of the parameter estimates of the system with respect to the input. The covariance matrix is approximated using a joint likelihood function of hidden states and measurements, and a combination of state filters and smoothers. The input is parametrized using an autoregressive model. The proposed approach is illustrated through a simulation example.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Wireless MIMO switching with zero-forcing relaying

Wireless MIMO switching with zero-forcing relaying

引用

Annual Allerton Conference on Communication, control, and Computing

作者： Fanggang Wang Soung Chang Liew Dongning Guo Institute of Network Coding The Chinese University of Hong Kong Hong Kong China State Key Laboratory of Rail Traffic Control and Safety EIE Beijing Jiaotong University China Department of Electrical Engineering & Computer Science Northwestern University USA

A wireless relay with multiple antennas is called a multiple-input-multiple-output (MIMO) switch if it forms a one-to-one mapping from the inputs (uplinks) to the outputs (downlinks). This paper studies the case with N source stations and N destination stations (which may be the same set), so that the mapping is any permutation of the N inputs. Moreover, the switching is achieved by "precode-and-forward", i.e., the relay precedes the received vector signal by a zero-forcing matrix and transmits it, so that each destination station receives only its desired signal with enhanced noise but no interference. Assuming full channel state information is available at the switch, the design of the zero-forcing precoder for maximizing some performance metric based on the received signal-to-noise ratios is investigated. The problem with two stations is completely solved in closed form in certain cases. In other cases, heuristic algorithms are proposed to optimize the precoder. These algorithms are shown to be near-optimal.

关键词： Relays Switches MIMO Signal to noise ratio Downlink Throughput

来源：评论

学校读者我要写书评

暂无评论

Trajectory Tracking and Consensus of Networks of Euler—Lagrange Systems

引用

IFAC Proceedings Volumes 2011年第1期44卷 938-943页

作者： Emmanuel Nuño Romeo Ortega Luis Basañez David Hill Department of Computer Science. University of Guadalajara. Guadalajara Mexico Institute of Industrial and Control Engineering. Technical University of Catalonia. Barcelona Spain Laboratoire des Signaux et Systèmes. SUPÉLEC. Gif-sur- Yvette France School of Electrical and Information Engineering. The University of Sydney. Sydney Australia

Abstract This paper addresses the problem of synchronizing networks of nonidentical, nonlinear dynamical systems described by Euler–Lagrange equations. It is assumed that the communication graph is simply connected and that the systems are fully actuated, with their states available for measurement. The communications can be subject to constant time-delays. The main result of the paper is a controller for each system in the network, capable of tracking a desired trajectory and, if such trajectory does not exist, capable of reaching a network consensus. Moreover, it is proved that, if there are no time-delays and the graph is balanced each system reaches a consensus arbitrarily near the average of the initial conditions of all the systems in the network. Simulations using a ten robot manipulator network with different time-delays are provided.

关键词： Euler-Lagrange Systems Synchronization Consensus Time-delays

来源：评论

学校读者我要写书评

暂无评论

Spectral analysis of sEMG signals to investigate skeletal muscle fatigue

Spectral analysis of sEMG signals to investigate skeletal mu...

引用

IEEE Conference on Decision and control

作者： Parmod Kumar Anish Sebastian Chandrasekhar Potluri Yimesker Yihun Madhavi Anugolu Jim Creelman Alex Urfer D. Subbaram Naidu Marco P. Schoen Measurement and Control Engineering Research Center (MCERC) School of Engineering Idaho State University Pocatello ID USA MCERC School of Engineering Idaho State University Pocatello ID USA Department of Physical and Occupational Therapy Idaho State University Pocatello ID USA Department of Electrical Engineering and Computer Science MCERC Idaho State University Pocatello ID USA Department of Mechanical Engineering MCERC Idaho State University Pocatello ID USA

ISBN: (纸本)9781612848006;9781612848013

Our recent investigations are focused to develop dynamic models for skeletal muscle force and finger angles for prosthetic hand control using surface electromyographic sEMG as input. Since sEMG is temporal and spatially distributed and is influenced by various factors, muscle fatigue and its related sEMG becomes of importance. This study is an effort to spectrally analyze the sEMG signal during progression of muscle fatigue. The sEMG is captured from the arms of healthy subjects during muscle fatiguing experiments for dynamic and static force levels. Filtered sEMG signal is segmented in five parts with 75% overlap between adjacent segments. The analysis is done using different classical (fast Fourier transform, Welch's averaged modified periodogram), model-based (Yule-Walker, Burg, Covariance and Modified Covariance autoregressive (AR) method), and eigenvector methods (Multiple Signal Classification (MUSIC) and eigenvector spectral estimation method) in frequency domain. Results show that the classical and eigenvector based methods are more sensitive than the model-based methods to fatigue related changes in sEMG signals.

关键词： Muscles Fatigue Force Multiple signal classification Dynamics Estimation Electromyography

来源：评论

学校读者我要写书评

暂无评论

Guest Editorial

引用

IEEE Transactions on Industrial Electronics 2011年第4期58卷 1074-1080页

作者： Marco Liserre Josep Balcells Thomas Basso Jan T. Bialasiewicz Carlo Cecati Sudipta Chakraborty Josep M. Guerrero Mehrdad Kazerani Friederich Kupzog Adel Nasiri Peter Palensky José Rodriguez Pedro Rodríguez Thilo Sauter Remus Teodorescu Polytechnic University of Bari Bari Italy Universitat Politéchnica de Catalunya Barcelona Spain National Renewable Energy Laboratory (NREL) Golden CO USA Electrical Engineering Department University of Colorado Denver CO USA Department of Electrical and Information Engineering University of L'Aquila L'Aquila Italy National Renewwable Energy Laboratory (NREL) Golden CO USA Department of Automatic Control Systems and Computer Engineering Technical University of Catalonia Barcelona Spain Department of Electrical and Computer Engineering University of Waterloo Waterloo ON Canada Institue of Computer Technology Vienna Technical University Vienna Austria Department of Electrical Engineering and Computer Science University of Wisconsin Milwaukee WI USA Sustainable Building Technologies Austrian Institue of Technology (AIT) Vienna Austria Department of Electronics Engineering Universidad Técnica Federico Santa María Valparaiso Chile Research Group on Renewable Electrical Energy Systems Department of Electrical Engineering Universitat Politécnica de Catalunya (UPC) Barcelona Spain Austrian Academy of Sciences Institute of Integraded Sensor Systems Wiener Neustadt Austria

The 20 papers in this second part of this special section are classified by energy sources (wind, photovoltaic, hydro, etc.), grid-related issues (islanding, synchronization, microgrid, and smart grid), and converters... 详细信息

关键词： Special issues and sections Smart grids Renewable energy resources Photovoltaic systems Power conversion Wind energy Hydroelectric power generation Power grids

来源：评论

学校读者我要写书评

暂无评论

State and unknown input estimation in a CSTR using higher-order sliding mode observer

State and unknown input estimation in a CSTR using higher-or...

引用

IEEE Latin American Robotics Symposium, LARS

作者： Bertulfo Giraldo Osorio Héctor Botero Castro Juan Diego Sánchez Torres Escuela de Mecatrónica Facultad de Minas Grupo de Investigación en Procesos Dinámicos-Kalman Universidad Nacional de Colombia Colombia Department of Electrical Engineering and Computer Science Automatic Control Laboratory CINVESTAV Unidad Guadalajara Mexico

The aim of this paper is to design and analyze an observer based on high-order sliding mode to estimate states and unknown inputs in a continuous stirred tank reactor (CSTR). Additionally, the designed HOSM allows to ... 详细信息

关键词： Observers Chemical reactors Mathematical model Robustness Equations Heating Observability

来源：评论

学校读者我要写书评

暂无评论

Research and implementation on the security scheme of industrial wireless network

Research and implementation on the security scheme of indust...

引用

International Conference on Information Networking

作者： Min Wei Keecheon Kim Ping Wang Jongwon Choe Department of Computer Science and Engineering Konkuk University Seoul South Korea Key Laboratory of Network control & Intelligent Instrument Chongqing University of Posts and Telecommunications Chongqing China Key Laboratory of Network control & Intelligent Instrument Ministry of Education Chongqing University of Posts and Telecommunications Chongqing China Sookmyung Women's University Seoul South Korea

ISBN: (纸本)9781612846613

Industrial Wireless communications is emerging technology after the Fieldbus in industrial field. For industrial control application with wireless industrial technologies, the WIA-PA standard defines the protocol suite, system management, gateway, and security for low-data-rate wireless connectivity with fixed, portable, and moving devices supporting the limited power consumption requirements. In this paper we summary the security provision in the current standards. Then we present a new security architecture and security protocol based on WIA-PA standard. Furthermore, we design and implement the security communication services. Finally, the security test results illustrate that these security scheme may enhance the security reliability of the WIA-PA network communication.

关键词： Intrusion detection Communication system security Authentication Wireless networks Protocols

来源：评论

学校读者我要写书评

暂无评论

Robust H-infinity fuzzy control for uncertain Markovian jump nonlinear singular systems with wiener process

引用

控制理论与应用（英文版） 2010年第2期8卷 205-210页

作者： Aiqing ZHANG 1 , Huajing FANG 2 (1.College of Mathematics and computer science, Jianghan University, Wuhan Hubei 430056, China 2.department of control science and engineering, Huazhong University of science and Technology, Wuhan Hubei 430074, China) College of Mathematics and Computer Science Jianghan University Wuhan Hubei China Department of Control Science and Engineering Huazhong University of Science and Technology Wuhan Hubei China

This paper deals with the problems of robust stochastic stabilization and H-infinity control for Markovian jump nonlinear singular systems with Wiener process via a fuzzy-control approach. The Takagi-Sugeno (T-S) fuzzy model is employed to represent a nonlinear singular system. The purpose of the robust stochastic stabilization problem is to design a state feedback fuzzy controller such that the closed-loop fuzzy system is robustly stochastically stable for all admissible uncertainties. In the robust H-infinity control problem, in addition to the stochastic stability requirement, a prescribed performance is required to be achieved. Linear matrix inequality (LMI) sufficient conditions are developed to solve these problems, respectively. The expressions of desired state feedback fuzzy controllers are given. Finally, a numerical simulation is given to illustrate the effectiveness of the proposed method.

关键词： Fuzzy control H-infinity control Singular systems Stochastic stability Linear matrix inequality (LMI)

来源：评论

学校读者我要写书评

暂无评论

Effect of polymer thickness on the chemical sensing behavior of polymer-coated mass-sensitive disk resonators

Effect of polymer thickness on the chemical sensing behavior...

引用

IEEE International Conference on Micro Electro Mechanical Systems

作者： S. Truax K.S. Demirci L. Beardslee Y. Luzinova B. Mizaikoff A. Hierlemann O. Brand School of Electrical and Computer Engineering Georgia Institute of Technology Atlanta GA USA Texas Instrumenits Inc. Dallas TX USA Center of Disease Control and Prevention Atlanta GA USA Institute of Analytical and Bioanalytical Chemistry Ulm University Ulm Germany Department of Biosystems Science and Engineering ETH Zurich Basel Switzerland

ISBN: (纸本)9781424496327

The chemical sensing behavior of disk microresonators, as it is affected by the thickness of polymer coatings applied to them, is reported. The disk microresonators were fabricated using a CMOS-compatible silicon bulk micro machining process. The disks were subsequently coated with layers of (poly) isobutylene (PIB) as a sensing film and exposed to gaseous benzene, toluene, and m-xylene. The experimental results agree well with analytical models derived for both the chemical sensitivity and limit of detection (LOD). Minimal LODs measured for benzene, toluene, and m-xylene were 5.3 ppm, 1.2 ppm, and 0.6 ppm, respectively.

关键词： Polymers Resonant frequency Chemicals Sensitivity Sensors Heating Chemical sensors

来源：评论

学校读者我要写书评

暂无评论

RESTful web service composition: Extracting a process model from Linear Logic theorem proving

RESTful web service composition: Extracting a process model ...

引用

International Conference on Next Generation Web Services Practices (NWeSP)

作者： Xia Zhao Enjie Liu Gordon J. Clapworthy Na Ye Yueming Lu Department of Computer Science and Technology University of Bedfordshire Luton UK School of Electronic and Information Engineering Xi'an Jiaotong University Xian China School of Information and Control Engineering Xi'an University of architecture and technology Xian China Key Laboratory of Trustworthy Distributed Computing and Service Ministry of Education Beijing University of Posts and Telecommunications Beijing China

This paper introduces a two-stage Linear Logic based program synthesis approach to automatic RESTful web service composition. The Linear Logic theorem proof is applied at both resource and service invocation method levels, which greatly improves the searching efficiency and guarantees the correctness and completeness of the service composition. Furthermore, the process calculus is used as formalism for the composition process, which enables the approach to be executable at the business management level. The process calculus is attached to the Linear Logic inference rules in the style of type theory, so the process model is extracted directly from the complete proof. An example is given to show the extraction of a process model from a Linear Logic proof search.

关键词： Web services Business Calculus Educational institutions Next generation networking Marine vehicles Electronic mail

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：