检索结果-内蒙古大学图书馆

Mediterranean Conference on control and Automation (MED)

作者： Tomislav Sijak Ognjen Kuljaca Ljubomir Kuljaca Brodarski Institute/Control Engineering Dept Zagreb Croatia Alcorn State University/Systems Research Institute Alcorn State USA Faculty of El. Eng. and Computing/Dept. of Control and Computer Zagreb Croatia

eng.neering procedure for approximate analytical determination of describing function of nonlinear systems with odd static characteristics is presented in the paper. Generalized mathematical expressions for determining such describing function with error estimation are given. The procedure is illustrated on determination of describing function, and corresponding error estimation, of nonlinear structure consisting of fuzzy element and typical nonlinear element.

关键词： Fuzzy control Power harmonic filters Fuzzy systems Nonlinear systems control systems Nonlinear control systems Error analysis Frequency control eng.neering Signal synthesis

来源：评论

学校读者我要写书评

暂无评论

Fault-tolerant control of Uncertain Time-delay Discrete-time Systems Using T-S Model

Fault-tolerant Control of Uncertain Time-delay Discrete-time...

引用

IEEE International Conference on Fuzzy Systems (FUZZ-IEEE)

作者： Le Zhang Yuan-Wei Jing Rong-Zhen Chen Honghai Liu Georgi M. Dimirovski Control Science Institute of the School of Information Science and Engineering Northeastern University Shenyang China Institute of Industrial Research University of Portsmouth Portsmouth UK SS Cyril and Methodius Faculty of Electrical & Computer Engineering University of Skopje Skopje Macedonia Computer Eng. Department Dogus University Istanbul Turkey

The investigated control problem of nonlinear time-delay discrete-time systems is addressed using Takagi-Sugeno model. Parametric uncertainty and time-delay terms are employed in building the Takagi-Sugeno model for the controlled plant for the purpose of close representation of the original plant system. The integrity and robustness are guaranteed for the closed-loop fuzzy system in sense of Lyapunov stability method via fuzzy state observers. Sufficient conditions for the fuzzy system to possess integrity against actuator failures and sensor failures in the closed-loop are derived in terms of linear matrix inequalities under assumption of known bounds on uncertainties. The results for trailer-truck example are used to illustrate the effectiveness of the method.

关键词： Fault tolerant systems Fuzzy systems Takagi-Sugeno model Uncertainty Nonlinear control systems Robust stability Lyapunov method Sufficient conditions Hydraulic actuators Sensor systems

来源：评论

学校读者我要写书评

暂无评论

LANDING AN UNMANNED AIR VEHICLE: VISION BASED MOTION ESTIMATION AND NONLINEAR control

引用

Asian Journal of control 2008年第3期1卷

作者： Omid Shakernia Yi Ma T. John Koo Shankar Sastry Dept. of Electrical Engineering & Computer Science University of California at Berkeley Berkeley CA94720-1774 U.S.A. Tak-Kuen John Koo received the B.Eng. degree in 1992 in Electronic Engineering and the M.Phil. in 1994 in Information Engineering both from the Chinese University of Hong Kong. From 1994 to 1995 he was a graduate student in Signal and Image Processing Institute at the University of Southern California. He is currently a Ph.D. Candidate in Electrical Engineering and Computer Sciences at the University of California at Berkeley. His research interests include nonlinear control theory hybrid systems inertial navigation systems with applications to unmanned aerial vehicles. He received the Distinguished M.Phil. Thesis Award of the Faculty of Engineering The Chinese University of Hong Kong in 1994. He was a consultant of SRI International in 1998. Currently he is the team leader of the Berkeley AeRobot Team and a delegate of The Graduate Assembly University of California at Berkeley. He is a student member of IEEE and SIAM. S. Shankar Sastry received his Ph.D. degree in 1981 from the University of California Berkeley. He was on the faculty of MIT from 1980-82 and Harvard University as a Gordon McKay professor in 1994. He is currently a Professor of Electrical Engineering and Computer Sciences and Bioengineering and Director of the Electronics Research Laboratory at Berkeley. He has held visiting appointments at the Australian National University Canberra the University of Rome Scuola Normale and University of Pisa the CNRS laboratory LAAS in Toulouse (poste rouge) and as a Vinton Hayes Visiting fellow at the Center for Intelligent Control Systems at MIT. His areas of research are nonlinear and adaptive control robotic telesurgery control of hybrid systems and biological motor control. He is a coauthor (with M. Bodson) of “Adaptive Control: Stability Convergence and Robustness Prentice Hall 1989.” and (with R. Murray and Z. Li) of “A Mathematical Introduction to Robotic Manipulati

In this paper, we use computer vision as a feedback sensor in a control loop for landing an unmanned air vehicle (UAV) on a landing pad. The vision problem we address here is then a special case of the classic ego-motion estimation problem since all feature points lie on a planar surface (the landing pad). We study together the discrete and differential versions of the ego-motion estimation, in order to obtain both position and velocity of the UAV relative to the landing pad. After briefly reviewing existing algorithm for the discrete case, we present, in a unified geometric framework, a new estimation scheme for solving the differential case. We further show how the obtained algorithms enable the vision sensor to be placed in the feedback loop as a state observer for landing control. These algorithms are linear, numerically robust, and computationally inexpensive hence suitable for real-time implementation. We present a thorough performance evaluation of the motion estimation algorithms under varying levels of image measurement noise, altitudes of the camera above the landing pad, and different camera motions relative to the landing pad. A landing controller is then designed for a full dynamic model of the UAV. Using geometric nonlinear control theory, the dynamics of the UAV are decoupled into an inner system and outer system. The proposed control scheme is then based on the differential flatness of the outer system. For the overall closed-loop system, conditions are provided under which exponential stability can be guaranteed. In the closed-loop system, the controller is tightly coupled with the vision based state estimation and the only auxiliary sensor are accelerometers for measuring acceleration of the UAV. Finally, we show through simulation results that the designed vision-in-the-loop controller generates stable landing maneuvers even for large levels of image measurement noise. Experiments on a real UAV will be presented in future work.

关键词： Motion estimation computer vision based control unmanned air vehicle differential flatness

来源：评论

学校读者我要写书评

暂无评论

Special Issue on Variable Structure System control — New Designs and Applications

引用

Asian Journal of control 2008年第4期5卷

作者： Prof. Jian-Xin Xu Prof. Leonid Fridman Department of Electrical and Computer Eng. National University of Singapore 4 Engineering Drive 3 Singapore 117576 Tel +65 6874-2566 Fax +65 6779-1103 Dr Jian-Xin Xu received his Bachelor degree from Zhejiang University China in 1982. He attended the University of Tokyo Japan where he received his Master's and Ph.D. degrees in 1986 and 1989 respectively. All his degrees are in Electrical Engineering. He worked for one year in the Hitachi research Laboratory Japan and for more than one year in Ohio State University U.S.A. as a Visiting Scholar. In 1991 he joined the National University of Singapore and is currently an associate professor in the Department of Electrical Engineering. His research interests lie in the fields of learning control variable structure control fuzzy logic control discontinuous signal processing and applications to motion control and process control problems. He is the associate editor of Asian Journal of Control member of TC on variable structure systems and sliding mode control of IEEE Control Systems Society and a senior member of IEEE. He has produced more than 90 peer-refereed journal papers near 160 technical papers in conference proceedings and authored/edited 4 books. Division de Estudios de Posgrado Facultad de Ingenieria National Autonomous University of Mexico DEP-FI UNAM Edificio “A” Circuito Exterior Ciudad Universitaria A. P. 70–256 C.P.04510 Mexico D.F. Mexico Tel +52 55 56223014 Fax +52 55 56161719 Dr. Leonid M. Fridman received his M.S in mathematics from Kuibyshev (Samara) State University Russia Ph.D. in Applied Mathematics from Institute of Control Science (Moscow) and Dr. of Science degrees in Control Science from Moscow State University of Mathematics and Electronics in 1976 1988 and 1998 respectively. In 1976–1999 Dr. Fridman was with the Department of Mathematics at the Samara State Architecture and Civil Engineering Academy Samara Russia. In 2000–2002 he was with the Department of Postgraduate Study and Investigations at the Chihuahu

来源：评论

学校读者我要写书评

暂无评论

Resonant tunneling through Quantum States of Enhancement Mode an In‐Plane‐Gate Quantum Dot Transistor

引用

AIP Conference Proceedings 2007年第1期893卷 807-808页

作者： S. H. Son S. W. Hwang J. I. Lee Y. J. Park Y. S. Yu D. Ahn 1Dept. of Electronics & Computer Engineering Korea University Sungbuk Anam Seoul 136‐075 Korea 2Nano Device Research Center Korea Institute of Science and Technology P. O. Box 131 Cheongryang Seoul 130‐650 Korea 4Institute of Quantum Information Processing and Systems University of Seoul 90 Jeonnong Dongdaemun Seoul 130‐743 Korea 3Dept. of Information & Control Eng. Hankyong National university 67 Seokjeong Anseong Kyeonggi Korea

We demonstrate electron transport in an enhancement mode in‐plane‐gate quantum dot transistor (IPGQDT). Deeply etched trenches allow large positive biases on the IPG with negligible leakage current Strong negative differential resistance (NDR) peaks and single electron tunneling are observed in a wide gate bias window. The position of the NDR peaks systematically moves with the change of the gate bias, suggesting that they originate from resonant tunneling through QD quantum states.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Body localization in still images using hierarchical models and hybrid search

Body localization in still images using hierarchical models ...

引用

2006 IEEE computer Society Conference on computer Vision and Pattern Recognition, CVPR 2006

作者： Zhang, Jiayong Luo, Jiebo Collins, Robert Liu, Yanxi Robotics Institute Carnegie Mellon Univ. PA Kodak Research Lab. Eastman Kodak Co. NY Dept. of Computer Science and Eng. Pennsylvania State Univ. PA

ISBN: (纸本)0769525970

We present a 3-level hierarchical model for localizing human bodies in still images from arbitrary viewpoints. We first fit a simple tree-structured model defined on a small landmark set along the body contours by Dynamic Programming (DP). The output is a series of proposal maps that encode the probabilities of partial body configurations. Next, we fit a mixture of view-dependent models by Sequential Monte Carlo (SMC), which handles self-occlusion, anthropometric constraints, and large viewpoint changes. DP and SMC are designed to search in opposite directions such that the DP proposals are utilized effectively to initialize and guide the SMC inference. This hybrid strategy of combining deterministic and stochastic search ensures both the robustness and efficiency of DP, and the accuracy of SMC. Finally, we fit an expanded mixture model with increased landmark density through local optimization. The model hierarchy is trained on a large number of gait images. Extensive tests on cluttered images with varying poses including walking, dancing and various types of sports activities demonstrate the feasibility of the proposed approach. © 2006 IEEE.

关键词： Imaging systems

来源：评论

学校读者我要写书评

暂无评论

Miniature endoscopie capsule robot using biomimetic micro-patterned adhesives

Miniature endoscopie capsule robot using biomimetic micro-pa...

引用

1st IEEE/RAS-EMBS International Conference on Biomedical robotics and Biomechatronics, 2006, BioRob 2006

作者： Karagozler, Mustafa Emre Cheung, Eugene Kwon, Jiwoon Sitti, Metin Dept. of Electrical and Computer Eng. Carnegie Mellon University Pittsburgh PA 15213 United States Dept. of Mechanical Eng. Carnegie Mellon University Pittsburgh PA 15213 United States Robotics Institute Carnegie Mellon University Pittsburgh PA 15213 United States Intelligent Microsystem Center KIST Seoul Korea Republic of

ISBN: (纸本)1424400406

This paper presents a stopping and a locomotion mechanism to be used with an endoscopic microcapsule robot. In the diagnosis of gastrointestinal diseases, microcapsules have been developed recently as alternatives to conventional endoscopy. However, they have less accuracy and functionality in diagnosis as they lack the ability to control their position. We propose mechanisms to be used with such microcapsules that would enable them to anchor and crawl in any position inside the small intestines. The stopping mechanism, actuated by coil type shape memory alloys, makes use of dry and wet elastomer (PDMS) micro-patterned adhesives inspired by beetles to attach to the intestinal tract. The locomotion mechanism, inspired by the locomotion principles of inchworms, is a modular expansion of the stopping mechanism. Both the stopping and the crawling locomotion mechanisms have been built and successfully tested inside a flexible vinyl tube. Results showed stopping with high repeatability and 0.5 mm/sec locomotion speed. The stopping mechanism was also integrated to a tethered camera for testing.

关键词： Modular robots

来源：评论

学校读者我要写书评

暂无评论

Multimedia transfer over the internet: A control based improvement of AIMD algorithm 2

Multimedia transfer over the internet: A control based impro...

引用

2nd International Conference on Information and Communication Technologies: From Theory to Applications, ICTTA 2006

作者： Jing, Yuanwei Dimirovski, Georgi M. Institute of Control Science School of Information Science and Engineering Northeastern University Shenyang Liaoning110004 China Department of Computer Engineering Faculty of Engg. Dogus University Istanbul34722 Turkey Faculty of Electrical Eng. Institute of ASE SS Cyril and Methodius University Skopje MK-1000 Macedonia

ISBN: (纸本)0780395212

The known Additive Increase Multiplicative Decrease algorithm has been further investigated and a novel, improved TCP-friendly flow control algorithm derived. This algorithm provides basic flow congestion control for multimedia data traffic over Internet, and also fulfils the fairness between RTP flows and TCP flows while retaining essential characteristics of this algorithm. Important parameters that are involved in network's communication process have been thoroughly studied and properly introduced into the novel algorithm. Innovation work done to this known algorithm helps smoothing the multimedia transfer and guarantees the fairness among TCP flows and RTP flows. © 2006 IEEE.

关键词： Transmission control protocol

来源：评论

学校读者我要写书评

暂无评论

A Parallel-based Lifting Algorithm and VLSI Architecture for DWT

引用

Journal of Electronics(China) 2006年第2期23卷 244-248页

作者： Xiong Cheng.i Tian Jinwen Liu Jian Gao Zhirong The State Key Lab of Education Commission for Image Processing and Intelligent Control Institute of Pattern Recognition ＆ Artificial Intelligence Huazhong Univ. of Science ＆ Tech. Wuhan 430074 China College of Electronic Info. Eng. South- Center Univ. for Nationalities Wuhan 430074 China Dept of Computer Science Wuhan Univ. of Science ＆ Eng. Wuhan 430074 China

A novel Parallel-Based Lifting Algorithm （PBLA） for Discrete Wavelet Transform （DWT）, exploiting the parallelism of arithmetic operations in all lifting steps, is proposed in this paper. It leads to reduce the critical path latency of computation, and to reduce the complexity of hardware implementation as well. The detailed derivation on the proposed algorithm, as well as the resulting Very Large Scale Integration （VLSI） architecture, is introduced, taking the 9/7 DWT as an example but without loss of generality. In comparison with the Conventional Lifting Algorithm Based Implementation （CLABI）, the critical path latency of the proposed architecture is reduced by more than half from （4Tm ＋ 8Ta）to Tm ＋ 4Ta, and is competitive to that of Convolution-Based Implementation （CBI）, but the new implementation will save significantly in hardware. The experimental results demonstrate that the proposed architecture has good performance in both increasing working frequency and reducing area.

关键词： Discrete Wavelet Transform （DFT） Lifting scheme Parallel Very Large Scale Integration（VLSI）

来源：评论

学校读者我要写书评

暂无评论

Switched Fuzzy Systems: Representation Modelling, Stability Analysis, and control Design

Switched Fuzzy Systems: Representation Modelling, Stability ...

引用

International IEEE Conference on Intelligent Systems, IS

作者： Hong Yang Georgi M. Dimirovski Jun Zhao Control Science Institute of the School of Information Science and Engineering Northeastern University Shenyang Liaoning China ASE Institute of the Faculty of Electrical Engineering Saints Cyril and Methodius University슠of슠Skopje Skopje Macedonia Computer Eng. Department of the Faculty of Engineering Dogus University Kadikoy Istanbul Turkey

Stability issues for switched systems whose subsystems are all fuzzy systems, either continuous-time or discrete-time, are studied and new results derived. Innovated representation models for switched fuzzy systems are proposed. The single Lyapunov function method has been adopted to study the stability of this class of switched fuzzy systems. Sufficient conditions for quadratic asymptotic stability are presented and stabilizing switching laws of the state-dependent form are designed. The elaborated illustrative examples and the respective simulation experiments demonstrate the effectiveness of the proposed method

关键词： Fuzzy systems Stability analysis control design Fuzzy control Switched systems Lyapunov method Sufficient conditions Asymptotic stability control system synthesis Intelligent systems

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：