检索结果-内蒙古大学图书馆

IEEE International Symposium on Intelligent control (ISIC)

作者： P. Carbonell Z.P. Jiang D.W. Repperger Department of Systems Engineering and Control Polytechnic University of Valencia Alcoy Spain Department of Electrical and Computer Engineering Brooklyn Metrotech Center Polytechnic University Brooklyn NY USA HECP Air Force Research Laboratory OH USA

A nonlinear fuzzy backstepping controller is presented for set-point regulation of a pneumatic muscle actuator. Inflation and deflation are the two possible modes of operation of this actuator. Three fuzzy sets, one for each of both modes and one for the transition region, are considered. Each fuzzy set is associated with a local backstepping controller. At the inflation and deflation regimes, the associated controllers are exact backstepping controllers, whereas a robust nonlinear backstepping controller is used at the transition regime and deals with regime uncertainty. The use of fuzzy membership functions provides a smooth controller. The closed-loop system is globally and ultimately bounded.

关键词： Fuzzy control Fuzzy systems Backstepping control systems Muscles Pneumatic actuators Sliding mode control Nonlinear control systems Robust control Nonlinear dynamical systems

来源：评论

学校读者我要写书评

暂无评论

A resettable Kalman filter based on numerical differentiation 6

A resettable Kalman filter based on numerical differentiatio...

引用

6th European control Conference, ECC 2001

作者： Diop, S. Fromion, V. Grizzle, J.W. Laboratoire des Signaux and Systèmes Suéelec Gif sur Yvette Cedex91192 France Laboratoire d'Analyse des Systèmes et de Biométrie INRA Montpellier Cedex 134060 France Control Systems Laboratory Electrical Engineering and Computer Science Department University of Michigan Ann ArborMI48109-2122 United States

ISBN: (纸本)9783952417362

The extended Kalman filter is known to have excellent filtering characteristics, but its convergence is guaranteed only if it is initialized close enough to the true state value. Numerical differentiation based observers, on the other hand, may be designed to be globally convergent to a neighborhood of the true state value, but when the measurements are corrupted by uncertain signals their state estimates are delayed. We propose, in this Communication, an observer design scheme for nonlinear systems which combines these two techniques to yield a globally exponentially converging observer. © 2001 EUCA.

关键词： Nonlinear systems

来源：评论

学校读者我要写书评

暂无评论

A novel single-phase switched reluctance motor drive system

A novel single-phase switched reluctance motor drive system

引用

Annual Conference of Industrial Electronics Society

作者： R. Krishnan A.M. Staley K. Sitapati Motion Control Systems Research Group The Bradley Department of Electrical and Computer Engineering Virginia Polytechnic Institute and State University Blacksburg VA USA Custom Motor Solutions Group Kollmorgen Radford VA USA

Single phase switched reluctance machines (SRMs) have a special place in the emerging high-volume, low-cost and low-performance applications in appliances and also in high-speed low-power motor drives in various industrial applications. Single phase SRMs have a number of drawbacks: low power density as they have only 50% utilization of windings, lack of self-starting feature unless otherwise built in to the machine, most of the time with permanent magnets or sometimes with distinct and special machine rotor configurations or additional mechanisms. Many of these approaches are expensive or make the manufacturing process more difficult. In order to overcome such disadvantages, a method involving interpoles and windings is proposed in this paper. The proposed structure also provides four-quadrant operational capability with an appropriate converter. In addition to the proposed single phase SRM topology, a new and novel converter topology requiring only a single switch and a single diode is proposed. This enables for the first time a compact and low-cost single phase SRM. The present configuration, in addition, enables rotor position sensorless operation of the proposed single SRM drive system. Experimental results of the proposed SRM drive system are included.

关键词： Reluctance motors Reluctance machines Topology Switches Home appliances Motor drives Machine windings Permanent magnets Rotors Manufacturing processes

来源：评论

学校读者我要写书评

暂无评论

Abnormal failure mechanism of the asymmetrical emitter turn-off thyristor in high-frequency converters

Abnormal failure mechanism of the asymmetrical emitter turn-...

引用

Conference Record of the IEEE Industry Applications Society Annual Meeting (IAS)

作者： Z. Xu K. Motto A.Q. Huang Center for Power Electronics System The Bradley Department of Electrical and Computer Engineering Virginia Polytechnic Institute and State University Blacksburg VA USA Power/Control Systems Northrop Grumman Corporation Sykesville MD USA

The emitter turn-off thyristor (ETO) is a new MOS-controlled thyristor that is suitable for use in high-power converters due to its improved switching performance and easy control. This paper analyzes the abnormal failures related to the parasitic diode of the ETO in high-frequency converters for the first time. To prevent this failure, several solutions are proposed and improved ETOs are developed. Experimental results show that the proposed solutions can properly solve this problem.

关键词： Failure analysis Thyristors Anodes P-i-n diodes Switches control systems MOSFETs Tail Switching loss Cathodes

来源：评论

学校读者我要写书评

暂无评论

Representing membership functions as elements in function space

Representing membership functions as elements in function sp...

引用

American control Conference (ACC)

作者： Man Lung Wong Yeung Yam P. Baranyi Intelligent Control Systems Laboratory Department of Automation and Computer-Aided Engineering Chinese University of Hong Kong New Territories Hong Kong China Department of Telecommunications and Telematics Technical University of Budapest Budapest Hungary

This paper generalizes the geometric representation of membership functions comprising a finite number of characteristic points. An extended class of membership functions, satisfying certain monotonicity conditions, can now be expressed as elements in the space of square integrable functions. Specifically, bell-shaped membership functions, which were not possible before, can now be accommodated with this generalized representation. An example interpolation problem, treated using both the finite-dimensional approach and the generalized approach, is included for illustration.

关键词： Interpolation Marine vehicles Fuzzy sets Bismuth Lungs Intelligent control Laboratories Automation Telematics Artificial intelligence

来源：评论

学校读者我要写书评

暂无评论

Hybrid leader-follower and fuzzy-Petri-net traffic rate control and supervision in network systems

Hybrid leader-follower and fuzzy-Petri-net traffic rate cont...

引用

International Conference on Telecommunications in Modern Satellite, Cable and Broadcasting Service (TELSIKS)

作者： G.M. Dimirovski Yuanwei Jing Siying Zhang Institute of Automation & Systems Engg. Faculty of Electical Engineering SS Cyril and Methodius University Skopje Macedonia Department of Computer Engineering Faculty of Engineeing Dogus University Istanbul Turkey Institute of Control Theory School of Information Science & Engineering Northeastern University Shenyang Liaoning China

This paper addresses networking and traffic control problems in network systems along with the potential for introducing soft-computing applications at supervisory control level. The incentive Stackelberg strategy control concept was introduced to the networking model that comprises subsidiary systems of users and of network. A linear strategy is proposed for the elastic traffic problem, and results are demonstrated and illustrated via Kelly's (1997) example. The presented method is extended to the non-elastic traffic problem and results are also illustrated via a slightly modified Kelly example. Ways of employing combined analytical and soft-computing approaches and techniques in a hybrid framework have been investigated. A fuzzy-Petri-net supervisor is proposed to implement the strategic decision and control layer. Insofar obtained results are rather encouraging, and this research continues further towards possible implementation as well as some open theoretical issues.

关键词： Communication system traffic control control systems Intelligent networks Game theory Telecommunication control Traffic control Routing control system synthesis Supervisory control Pricing

来源：评论

学校读者我要写书评

暂无评论

Robust H∞ control for uncertain state-delayed linear systems with Markovian jumping parameters 6

Robust H∞ control for uncertain state-delayed linear system...

引用

6th European control Conference, ECC 2001

作者： Palhares, R.M. De Souza, C.E. Peres, P.L.D. Graduate Program in Electrical Engineering Pontifical Catholic University of Minas Gerais Av. Dom José Gaspar 500 Prédio 4 Belo Horizonte MG30535-610 Brazil Department of Systems and Control Laboratório Nacional de Computação Científica - LNCC Av. Getúlio Vargas 333 Petrópolis RJ25651-070 Brazil School of Electrical and Computer Engineering University of Campinas CP 6101 Campinas SP13081-970 Brazil

ISBN: (纸本)9783952417362

The problem of robust H∞ state-feedback control design for a class of continuous-time linear systems with Markovian jumping parameters and multiple time-varying delays at the states, and subject to uncertain parameters is addressed in this paper. It is assumed that the jumping parameters are available and the uncertain parameter belong to given convex bounded domains (polytope type uncertainty). A delay-independent sufficient condition assuring robust mean square stability and a prescribed level of H∞ disturbance attenuation for the closed-loop system is established in terms of linear matrix inequalities. © 2001 EUCA.

关键词： Linear matrix inequalities

来源：评论

学校读者我要写书评

暂无评论

On the Structure of Singular Discrete Linear Repetitive Processes

引用

IFAC Proceedings Volumes 2001年第13期34卷 555-559页

作者： K. Galkowski E. Rogers D.H. Owens Institute of Control and Computation Enginrering Technical University of Zielona Gora Poland Dept. of Electronics and Computer Science University of Southampton Southampton S017 1BJ U.K. Department of Automatic Control and Systems Engineering University of Sheffield Sheffield S1 3JD U.K.

Repetitive processes are a distinct class of 2D systems of both theoretical and applications interest. They are characterized by a series of sweeps through a set of dynamics with explicit interaction between the outputs, or pass profiles, produced on successive passes. Their essential unique features are that (i) information propagation is over a finite duration in one of the two separate directions of information propagation; and (ii) the explicit interaction between successive pass profiles can lead to oscillations in the sequence of pass profiles that increase in amplitude in the pass to pass direction. In the case of processes with linear dynamics (either differential or discrete) a reasonably rich systems theory is available for models which are standard (or nonsingular). In this paper, we provide the first substantial results on discrete linear repetitive processes described by a singular state space model.

关键词： Repetitive dynamics discrete dynamics singularity 2D linear systems

来源：评论

学校读者我要写书评

暂无评论

Elimination of leakage and ground-bounce effects in ground-penetrating radar data

Elimination of leakage and ground-bounce effects in ground-p...

引用

IEEE/SP Workshop on Statistical Signal Processing (SSP)

作者： R. Abrahamsson E.G. Larsson J. Li J. Habersat G. Maksymonko M. Bradley Department of Systems and Control University of Uppsala Uppsala Sweden Department of Electrical and Computer Engineering University of Florida Gainesville FL USA Electronic Sensor Directorate U.S. Army Night Vision Fort Belvoir VA USA Planning Systems Inc.orporated Slidell USA

We address the problem of removing specular ground surface reflections and leakage/cross-talk from downward looking stepped frequency ground-penetrating radar (GPR) data. A new model for the ground-bounce and the leakage/cross-talk is introduced. An algorithm that jointly estimates these effects from collected data is presented. The algorithm has the sound foundation of a nonlinear least squares (LS) fit to the presented model. The minimization is performed in a cyclic manner where one step is a linear LS minimization and the other step is a non-linear LS minimization where the optimum can efficiently be found using, e.g., the chirp-transform algorithm. The results after applying the algorithm to measured GPR data, collected at a US army test range, are also shown.

关键词： Ground penetrating radar Optical reflection Frequency Radar detection Object detection Antenna measurements Minimization methods Reflector antennas Radar cross section Night vision

来源：评论

学校读者我要写书评

暂无评论

LMI based stability analysis and controller design for a class of 2D discrete linear systems

LMI based stability analysis and controller design for a cla...

引用

IEEE Conference on Decision and control

作者： E. Rogers J. Lam K. Galkowski S. Xu J. Wood D.H. Owens Department of Electronics and Computer Science University of Southampton Southampton UK Department of Mechanical Engineering University of Hong Kong Hong Kong China Institute of Conool and Compuetian Engineering University of Zielona Gora Poland CESAME Catholic University of bumin Belgium Department of Aulamatic Control and Systems Engineering University of Sheffield Sheffield UK

ISBN: (纸本)0780370619

Discrete linear repetitive processes are a distinct class of 2D linear systems with applications in areas ranging from long-wall coal cutting through to iterative learning control schemes. The main feature which makes them distinct from other classes of 2D linear systems is that information propagation in one of the two distinct directions only occurs over a finite duration. We give an LMI based interpretation of stability for the sub-class of so-called discrete linear repetitive processes, both open loop and closed loop under a well defined practically relevant control law, and then apply this theory to solve currently open problems relating to robustness and stability margins for these processes. Also it is shown that the LMI approach to the computation of the stability margins for these processes can be combined with a concept of a pole for them to link these margins to expected performance-a key feature which is missing from the analysis of stability margins currently available in the 2D systems literature.

关键词： Stability analysis control systems Linear systems Robust stability Optimal control System testing Ear Open loop systems Robust control Performance analysis

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：