检索结果-内蒙古大学图书馆

American control Conference (ACC)

作者： K. Patan T. Parisini Institute of Control and Computation Engineering University of Zielona Góra Poland Department of Electrical Electronic and Computer Engineering University of Trieste Trieste Italy

In the paper some stochastic methods for dynamic neural network training are presented and compared. The considered network is composed of dynamic neurons, which contain inner feedbacks. This network can be used as a part of fault diagnosis system to generate residuals. Classical optimisation techniques, based on back propagation idea, suffer from many well-known drawbacks. Two stochastic algorithms are tested as training algorithms to overcome these difficulties. Efficiency of proposed learning methods is checked on two examples: modelling of an unknown linear dynamic system basing on simulated data and modelling of the actuator behaviour in the first section of the evaporation station in the Sugar Factory, Lublin using real data measurements. In these two significant examples, the stochastic learning algorithms are extensively compared from many different perspectives.

关键词： Stochastic processes Learning systems Neural networks Neurons Fault detection Mathematical model Nonlinear dynamical systems Fault diagnosis Neurofeedback Production facilities

来源：评论

学校读者我要写书评

暂无评论

DELAY-DEPENDENT ROBUST STABILIZATION OF UNCERTAIN DISCRETE-TIME STATE-DELAYED SYSTEMS

引用

IFAC Proceedings Volumes 2002年第1期35卷 261-266页

作者： Young Sam Lee Wook Hyun Kwon Engineering Research Center for Advanced Control and Instrumentation School of Electrical Engineering and Computer Science Seoul National Univ. Seoul 151-742 Korea

This paper concerns a problem of robust stabilization of a class of discrete-time systems with norm-bounded parameter uncertainty and unknown constant delay. A new delay-dependent stabilization condition using a memoryless controller is formulated in terms of matrix inequalities. An algorithm involving convex optimization is proposed to design a controller guaranteeing a suboptimal maximal delay such that the system can be stabilized for all admissible uncertainties. Numerical examples are given to illustrate the proposed results.

关键词： Delay-dependent Discrete system Time-delay Norm-bounded uncertainty

来源：评论

学校读者我要写书评

暂无评论

Positive realness and the analysis of a class of 2D linear systems 15th

Positive realness and the analysis of a class of 2D linear s...

引用

15th World Congress of the International Federation of Automatic control, 2002

作者： Galkowski, K. Paszke, W. Sulikowski, B. Rogers, E. Xu, S. Lam, J. Lin, Z. Owens, D.H. Institute of Control and Computation Engineering University of Zielona Gora Poland Department of Electronics and Computer Science University of Southampton SouthamptonSO17 1BJ United Kingdom Departament of Electrical and Computer Engineering University of Alberta EdmontonABT6G 2V4 Canada Department of Mechanical Engineering University of Hong Kong Hong Kong School of EEE Nanyang Technological University Nanyang Ave. Singapore639798 Singapore Department of Automatic Control and Systems Engineering University of Sheffield SheffieldS1 3JD United Kingdom

ISBN: (纸本)9783902661746

Repetitive processes are a distinct class of 2D linear systems with applications in areas ranging from long-wall coal cutting and metal rolling operations 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 independent directions only occurs over a finite duration. This, in turn, means that a distinct systems theory must be developed for them, which can then be translated into efficient routinely applicable controller design algorithms for applications domains. In this paper, we give the first significant results on a positive realness based approach to the analysis of these processes. Copyright © 2002 IFAC.

关键词： Linear systems

来源：评论

学校读者我要写书评

暂无评论

Implementation of virtual factory using MMS companion standard

Implementation of virtual factory using MMS companion standa...

引用

IEEE International Workshop on Factory Communication Systems (WFCS)

作者： Kwan-Joo Myoung Dong-Sung Kim Wook Hyun Kwon Engineering Research Center for Advanced Control Instrument Control Information Systems Laboratory School of Electrical Engineering and Computer Science Seoul National University Seoul South Korea

In this paper, a virtual factory using the manufacturing message specification (MMS) companion standard is implemented. The MMS companion standard (9506-3/spl sim/9506-7) and virtual machines are designed and implemented for robot, numerical controller (NC), programmable logic controller (PLC), and process control (PC). Finally, the MMS Internet monitoring system (MIMS) is developed for the testing system.

关键词： Production facilities Virtual manufacturing TCPIP Programmable control Virtual machining Condition monitoring Virtual machine monitors Manufacturing automation computer integrated manufacturing control systems

来源：评论

学校读者我要写书评

暂无评论

STOCHASTIC APPROACHES TO DYNAMIC NEURAL NETWORK TRAINING. ACTUATOR FAULT DIAGNOSIS STUDY

引用

IFAC Proceedings Volumes 2002年第1期35卷 53-58页

作者： Krzysztof Patan Thomas Parisini Institute of Control and Computation Engineering University of Zielona Góra ul. Podgórna 50 65-246 Zielona Góra Poland Dept. of Electrical Electronic and Computer Engineering DEEI-University of Trieste Via Valeno 10 34127 Trieste Italy

A paper deals with application of stochastic methods for dynamic neural network training. The considered network is composed of dynamic neurons, which contain inner feedbacks. This network can be used as a part of a fault diagnosis system to generate residuals. Up-to-date training algorithms, based on the classical back propagation, suffer from entrapment in local minima of an error function. Two stochastic algorithms are tested as training algorithms to overcome these difficulties. Efficiency of the proposed learning methods is checked using data recorded at Lublin Sugar Factory, Poland.

关键词： Actuators dynamic modelling fault detection learning algorithms neural network models

来源：评论

学校读者我要写书评

暂无评论

A vertically integrated approach to graduate control engineering education of ethnic minorities

A vertically integrated approach to graduate control enginee...

引用

Proceedings of the Biannual World Automation Congress

作者： M. Jamshidi Regents Professor of Electrical and Computer Engineering AT&T Professor of Manufacturing Engineering and Director of Autonomous Control Engineering (ACE) Center University of New Mexico Albuquerque NM USA

When representatives of high-technology corporations come to US University campuses to recruit science and engineering graduates, they will be hard pressed to find many ethnic minorities, women or people with disabilities. Is anybody surprised on this? The problem is a deep-rooted one indeed. Science, Mathematics and engineering education is among some of the shrinking majors for USA's graduating high school seniors. The problem is consistently and uniformly spread over the whole population of the United States (including the majority white population), and is even more pronounced among minority population. Some of our major corporations with a dominant role in the international market place are losing grounds to European and Asian competitors, in part, due to lack of vision to ensure for future supply of competent high-tech work force. Here by minority we mean African American, Native American (American Indians), Hispanic American, Alaskans and Pacific Islanders.

关键词： engineering education Educational institutions engineering profession computer aided manufacturing Mathematics Business Physics education control engineering Recruitment control engineering education

来源：评论

学校读者我要写书评

暂无评论

ROBUST CONGESTION control IN HIGH SPEED COMMUNICATION NETWORKS: A MODEL PREDICTIVE control APPROACH

引用

IFAC Proceedings Volumes 2002年第1期35卷 103-108页

作者： Hua O. Wang Yongru Gu Huajing Fang Laboratory for Intelligent and Nonlinear Control (LINC) Department of Electrical and Computer Engineering Duke University Durham NC 27708-0291 USA Center for Nonlinear and Complex Systems Department of Control Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China

In this paper, the design of explicit rate-based congestion control in high speed communication networks is considered. At a bottleneck node, there are multiple best-effort sources competing with other high priority cross traffic sources. The goal of congestion control is to achieve high link utilization, low packet loss, low delay, and fairness among the best-effort sources. In this paper, the high priority traffic is described by an autoregressive integrated moving average (ARIMA) process. To deal with the propagation delays associated with the best-effort sources, model predictive control, particularly, generalized predictive control, techniques are proposed to solve the congestion problem here. It is demonstrated that the proposed controller performs well and is robust to delay uncertainties. In addition, in a multiple-nodes configuration, the controller provides max-min fairness.

关键词： Communication control applications Model-based control Predictive control Communication networks Time delay Robustness

来源：评论

学校读者我要写书评

暂无评论

Optimal design and actuator sizing of redundantly actuated omni-directional mobile robots

Optimal design and actuator sizing of redundantly actuated o...

引用

IEEE International Conference on Robotics and Automation (ICRA)

作者： Tae Bum Park Jae Hoon Lee Byung-Ju Yi Whee Kuk Kim Burn Jae You Sang-Rok Oh School of Electrical Engineering and Computer Science Hanyang South Korea Department of Control & Instrumentation Engineering Korea University South Korea Intelligent System Control Research Center KIST South Korea

ISBN: (纸本)0780372727

Despite that omni-directional mobile robots have been employed popularly in several application areas, effort on optimal design of such mobile robots has been few in literature. Thus, this paper investigates the optimal design of omni-directional mobile robots. Particularly, optimal design parameters such as one or double offset distance of wheel mechanism and the wheel radius are identifed with respect to isotropic characteristic of mobile robots. In addition, the force transmission characteristics and actuator-sizing problem of mobile robots are investigated Analysis has been performed for three actuation sets. It is shown that the redundantly acruated mobile robot with three active caster wheels represents the best performance among them.

关键词： Actuators Mobile robots Wheels Angular velocity Optimal control control systems Roads computer science Intelligent systems Intelligent control

来源：评论

学校读者我要写书评

暂无评论

Generalized adaptive output-feedback form with unknown parameters multiplying high output relative-degree states

Generalized adaptive output-feedback form with unknown param...

引用

IEEE Conference on Decision and control

作者： P. Krishnamurthy F. Khorrami Control/Robotics Research Laboratory Department of Electrical and Computer Engineering Six Metrotech Center Polytechnic University Brooklyn NY USA

We propose a global high-gain scaling based observer/controller for systems in the uncertain generalized output-feedback canonical form. Time-varying nonlinear parametric uncertainty is allowed to occur coupled with unmeasured states in the system dynamics. This represents a significant generalization from existing results which allow unknown parameters only in output-dependent terms. This restriction in previous results is mainly owing to the fact that no general solution is known for systems involving bilinear terms in unmeasured states. The design utilizes the dual architecture of a high-gain observer and controller with the underlying state scaling being dynamically output-dependent. The proposed observer/controller structure provides a globally asymptotically stabilizing output-feedback solution for the benchmark open problem proposed in our earlier work with the provision that a magnitude bound on the unknown parameter be given.

关键词： Riccati equations control systems Linear matrix inequalities Differential equations Robot control Laboratories Ear Uncertainty Lyapunov method Linear systems

来源：评论

学校读者我要写书评

暂无评论

Impulse measure based performance analysis of sawing task by dual arm

Impulse measure based performance analysis of sawing task by...

引用

IEEE International Conference on Robotics and Automation (ICRA)

作者： Jae Hoon Lee Byung-Ju Yi Sang-Rok Oh Il Hong Suh School of Electrical Engineering and Computer Science Hanyang University South Korea Intelligent System Control Research Center KIST South Korea

ISBN: (纸本)0780372727

Some of manufacturing tasks such as sawing task often requires continuous impulsive motion. In case of sawing task, such impulsive motions can be observed between the teeth of the saw and the object. The amount of the external impulse exerted on the object has been treated as an important control paramete. Also, the internal impulses experienced at the joints should be simultaneously taken into account to avoid serious damage or injury at the joints. The purpose of this work is to improve the efficacy of sawing task by using dual arm. For this, an external impulse model for sawing task is suggested. Also, the closed-form internal impulse models are proposed for both a single and dual arms. Based on these models, a new measure for internal impulse is proposed. A normalized impulse ellipsoid reflecting the velocity direction is employed to visualize the impact geometry. Finally, the optimal sawing region is identified in which the amount of external impulse is maximized and the amount of the internal impulse is minimized. It is demonstrated through simulation that the dual arm exhibits better sawing performance over a single arm in aspects of external and internal impulses.

关键词： Performance analysis Sawing Robot kinematics Arm Humans Manipulators Injuries Manufacturing Robot control Equations

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：