检索结果-内蒙古大学图书馆

Organizational architectures and mission requirements: A model to determine congruence

systems engineering 2003年第3期6卷 184-194页

作者： Handley, Holly A.H. Levis, Alexander H. Systems Architectures Laboratory C3I Center George Mason University Fairfax VA 22030 George Mason University Systems Architecture Laboratory Department of Electrical Computer and Systems Engineering C3I Center System Architectures Laboratory

In order to determine congruence between proposed organizational architectures and evolving mission requirements, an executable model was developed in support of a subject experiment testing the hypothesis that an organization congruent with an expected mission results in better performance than a noncongruent organization. The model is based on the task process, the sequence of stages that occur in order to complete a task, where the delays of each stage are based on the interactions of the task with decision-makers and resources;in this case, tasks are limited to simple tasks completed by a single decision-maker with a single resource. The model is configured to a particular organizational design and simulated with a scenario, a list of tasks and their parameters that characterize the mission. Congruence is determined by using regression analysis to fit a linear equation to the output of the simulation and computing the coefficient of determination to evaluate the fit. The model was developed with trial experiment data and validated with post-experimental results. This model provides the foundation for a future, second order model that will include multiple decision-makers interacting with multiple resources to complete complex tasks. © 2003 Wiley Periodicals, Inc.

关键词： Architectural design

来源：评论

学校读者我要写书评

暂无评论

Plant Uncertainty Contribution to QFT Tracking control Design

引用

IFAC Proceedings Volumes 2003年第11期36卷 517-522页

作者： M. Gil-Martínez M. García-Sanz System Engineering and Automation Group Electrical Engineering Department University of La Rioja. Luis de Ulloa 20 26004 Logroño SPAIN. Tf.:+34 941 299496 Automatic Control and Computer Science Department Public University of Navarra. Campus Arrosadía s/n 31006 Pamplona SPAIN Tf.:+34 948 16938

Tracking feedback control trade-offs increase dangerously with arbitrarily large uncertainties in the process model. This is shown by the bounds in the QFT domain. In this context, the paper develops a theory on the contribution of the plant uncertainty to the tracking QFT bounds through a serious study of tracking bound formulas. From this, a methodology for uncertainty fragmentation is developed. It hopes to loosen the bound toughness, or the control design trade-offs. Better feedback benefits can be achieved while reducing the high-frequency amplification of noises and disturbances at the plant input at the same time. Different QFT controllers in a controller-scheduler structure should drive different uncertainty boundaries.

关键词： Quantitative Feedback Theory Robust control Uncertain Dynamical systems

来源：评论

学校读者我要写书评

暂无评论

Human systems integration and advanced technology in engineering department workload and manpower reduction

引用

NAVAL ENGINEERS JOURNAL 2003年第1期115卷 57-65页

作者： Lively, KA Seman, AJ Kirkpatrick, M KENNETH A. LIVELY graduated from the University of Colorado with a BS in applied mathematics and an MS in mathematics in 1976 and from the Massachusetts Institute of Technology with an MS in electrical engineering and the degree ocean engineer in naval architecture and marine engineering in 1984. He retired from the U.S. Navy in 1989 after 23 years of service. Assignments included electrical officer on the USS Constellation (CV 64) project engineer for the DDG 51 machinery control system (NAVSEA) and DDG 51 Technical Director (NAVSEA). He was vice president of the PDI Division of Bird-Johnson Company from July 1989 to November 1998 where he managed various gas turbine and machinery controls related development projects. He joined Anteon Corporation's Systems Engineering Group as senior controls engineer in December 1998 where he provided technical support to the integrated power systems program (NAVSEA PMS 510) and managed the Office of Naval Research Afloat Laboratory. DR. MARK KIRKPATRICK is currently an independent consultant in human factors and work-load/manning analysis and modeling. He holds a Ph.D. degree in experimental psychology from The Ohio State University and has 34 years of experience in applied human factors. From 1982 through 2000 Dr. Kirkpatrick served as the senior vice president of Carlow International. Prior to joining Carlow in 1982 Dr. Kirkpatrick served as a member of the technical staff at North American Rockwell's Missiles Division and as a project director and vice president for Essex Corporation. His areas of expertise include workload simulation task analysis operator-in-the-loop simulation human performance experimentation statistical analysis and human factors T&E. He has directed and/or participated in human factors projects for the U.S. Navy U.S. Army NASA Department of Transportation the U.S. Nuclear Regulatory Commission and private industry. ANTHONY J. SEMAN III is the technical manager for the reduced ship's crew by virtual presence (RSVP) advanced technology d

Aboard current ships, such as the DDG 51, engineering control and damage control activities are manpower intensive. It is anticipated that, for future combatants, the workload demand arising from operation of systems under conditions of normal steaming and during casualty response will need to be markedly reduced via automated monitoring, autonomous control, and other technology initiatives. Current DDG 51 class ships can be considered as a manpower baseline and under Condition III typical engineering control involves seven to eight watchstanders at manned stations in the Central control Station, the engine rooms and other machinery spaces. In contrast to this manning level, initiatives such as DD 21 and the integrated engineering plant (IEP) envision a partnership between the operator and the automation system, with more and more of the operator's functions being shifted to the automation system as manning levels decrease. This paper describes some human systems integration studies of workload demand reduction and, consequently, manning reduction that can be achieved due to application of several advanced technology concepts. Advanced system concept studies in relation to workload demand are described and reviewed including. Piecemeal applications of diverse automation and remote control technology concepts to selected high driver tasks in current DDG 51 activities. Development of the reduced ship's crew by virtual presence system that will provide automated monitoring and display to operators of machinery health, compartment conditions, and personnel health. The IEP envisions the machinery control system as a provider of resources that are used by various consumers around the ship. Resource needs and consumer priorities are at all times dependent upon the ship's current mission and the availability of equipment pawnbrokers.

关键词： Naval warfare

来源：评论

学校读者我要写书评

暂无评论

A disturbance accommodating controller for roll motion of a ship in irregular seaways

A disturbance accommodating controller for roll motion of a ...

引用

Proceedings of the Fifth 2002 ISOPE Pacific/Asia Offshore Mechanics Symposium

作者： Kim, Sunghoon Rhee, K.P. Lee, Sangmoo Naval Architecture and Ocean Eng. School of Engineering Seoul National Univ. Seoul Korea Republic of Department of Computer Control Dongyang University Youngju Kyungbook Korea Republic of

ISBN: (纸本)1880653591

An adaptive operation of a disturbance accommodating controller(DAC) depending on the seastate number for roll motion of a ship is suggested. DAC suggested in this paper assumes the shape of the disturbance, i. e. the wave slope excitation as a harmonic signal that consists of two sine waves of different frequencies and the dynamic model of this kind of disturbance is adopted in the controller to estimate the disturbance from the measurement of roll and to generate the control force to counteract exactly the estimated disturbance. Frequencies of the disturbance model used in the controller are selected so that the energy of the roll response in each seastate is to be minimized. Pole placement technique is combined to enhance the performance of DAC. A necessity of an adaptation scheme i. e. tuning the suggested DAC according to the varying sea environment is also shown by the results of the performance assessment of DAC's with different sets of design frequencies optimized for each seastate.

关键词： Motion control

来源：评论

学校读者我要写书评

暂无评论

Robust specification influence on feedback control strategies 15th

Robust specification influence on feedback control strategie...

引用

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

作者： Gil-Martínez, M. García-Sanz, M. System Engineering and Automation Group Electrical Engineering Department University of La Rioja Luis de Ulloa 20 Logroño26004 Spain Automatic Control and Computer Science Department Public University of Navarra Campus Arrosadía Pamplona31006 Spain

ISBN: (纸本)9783902661746

The feedback control structures are required in the presence of any kind of uncertainty. The benefits of the feedback are mainly paid with an excessive bandwidth that amplifies the sensor noise, saturating the actuators. This implies the necessity of design tradeoffs highly transparent from the Quantitative Feedback Theory. Supposing a given uncertainty for a plant, the set of performance and stability requirements will condition the problem solution. Taking advantage of the QFT bound typology and formulation, the contribution of the robust specification values to their simultaneous achievement will be analysed and particularly as regards the challenging task of the controller design. Copyright © 2002 IFAC.

关键词： controllers

来源：评论

学校读者我要写书评

暂无评论

Concurrent mapping and localization for mobile robots with segmented local maps

Concurrent mapping and localization for mobile robots with s...

引用

IEEE International Workshop on Intelligent Robots and systems (IROS)

作者： E. Zalama G. Candela J. Gomez S. Thrun Department of Control System Engineering University of Valladolid Spain Department of Computer Science Carnegie Mellon University Pittsburgh PA USA

A map of the environment map is a model of the surroundings of the robot. In many robot application domains, it is infeasible to obtain a prior map of the environment. It is therefore desirable that robots are able to generate maps by themselves. This problem is challenging, since it involves a simultaneous localization problem of the robot relative to its (incomplete) map. This article presents a new probabilistic algorithm for the simultaneous localization and mapping problem. The algorithm is based on matching of a set of local maps that have been obtained from range data. The main advantage of the proposed method is of computational nature. The use of segmented maps permits to eliminate unnecessary details, leading the method to be very appropriate for dynamical environments.

关键词： Mobile robots Robot kinematics Robot sensing systems Navigation Robot localization Simultaneous localization and mapping Robot control Orbital robotics Extraterrestrial measurements Sensor systems

来源：评论

学校读者我要写书评

暂无评论

Obstacle classification by a line-crawling robot: A rough neurocomputing approach 3rd

Obstacle classification by a line-crawling robot: A rough ne...

引用

3rd International Conference on Rough Sets and Current Trends in Computing, RSCTC 2002

作者： Peters, James F. Ahn, T.C. Borkowski, Maciej Department of Electrical and Computer Engineering University of Manitoba WinnipegMBR3T5V6 Canada Intelligent Information Control ann System Lab School of Electrical and Electronic Engineering Won-Kwang University 344-2 Shinyong-Dong Iksan Chon-Buk570-749 Korea Republic of

ISBN: (纸本)9783540442745

This article considers a rough neurocomputing approach to the design of the classify layer of a Brooks architecture for a robot control system. In the case of the line-crawling robot (LCR) described in this article, rough neurocomputing is used to classify sometimes noisy signals from sensors. The LCR is a robot designed to crawl along high-voltage transmission lines where noisy sensor signals are common because of the electromagnetic field surrounding conductors. In rough neurocomputing, training a network of neurons is defined by algorithms for adjusting parameters in the approximation space of each neuron. Learning in a rough neural network is defined relative to local parameter adjustments. Input to a sensor signal classifier is in the form of clusters of similar sensor signal values. This article gives a very brief description of a LCR that has been developed over the past three years as part of a Manitoba Hydro research project. This robot is useful in solving maintenance problems in power systems. A description of the basic features of the LCR control system and basic architecture of a rough neurocomputing system for robot navigation are given. A sample LCR sensor signal classification experiment is also given. © Springer-Verlag Berlin Heidelberg 2002.

关键词： Electromagnetic fields

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

ROBUST SPECIFICATION INFLUENCE ON FEEDBACK control STRATEGIES

引用

IFAC Proceedings Volumes 2002年第1期35卷 425-430页

作者： M. Gil-Martínez M. García-Sanz System Engineering and Automation Group Electrical Engineering Department University of La Rioja. Luis de Ulloa 20 26004 Logroño SPAIN Automatic Control and Computer Science Department Public University of Navarra. Campus Arrosadía 31006 Pamplona SPAIN

关键词： Robust control Uncertain dynamical systems Quantitative Feedback Theory

来源：评论

学校读者我要写书评

暂无评论

Software quality knowledge discovery: a rough set approach

Software quality knowledge discovery: a rough set approach

引用

IEEE Annual International computer Software and Applications Conference (COMPSAC)

作者： S. Ramanna J.F. Peters T. Ahn Department of Business Computing University of Winnipeg Winnipeg MAN Canada Department of Electrical and Computer Engineering University of Manitoba Winnipeg MAN Canada Intelligent Information Control & System Lab School of Electrical & Electronic Engineering Wonkwang University Iksan South Korea

This paper presents a practical knowledge discovery approach to software quality and resource allocation that incorporated recent advances in rough set theory, parameterized approximation spaces and rough neural computing. In addition, this research utilizes the results of recent studies of software quality measurement and prediction. A software quality measure quantifies the extent, to which some specific attribute is present in a system. Such measurements are considered in the context of rough sets. This research provides a framework for making resource allocation decisions based on evaluation of various measurements of the complexity of software. Knowledge about software quality is gained when preprocessing during which, software measurements are analyzed using discretization techniques, genetic algorithms in deriving reducts, and in the derivation of training and testing sets, especially in the context of the rough sets exploration system (RSES) developed by the logic group at the Institute of Mathematics at Warsaw University. Experiments show that both RSES and rough neural network models are effective in classifying software modules.

关键词： Software quality Software measurement Resource management Rough sets Logic testing Set theory Algorithm design and analysis Genetic algorithms Software testing system testing

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：