检索结果-内蒙古大学图书馆

PAPTAC 91st Annual Meeting

作者： West, Daniel D. Honaker, Darren Barry, Keith Corporate Process Control Sappi Fine Paper North America RR 3 Box 1600 Skowhegan ME 04976 United States IEEE TMEIC-GE Automation Systems 1501 Roanoke Blvd Salem VA 24153 United States GE Engineering Services One Community Drive Augusta ME 04330 United States

This paper will review the successful master controller revamp of Sappi Fine Paper North America's #3 Paper Machine at its Skowhegan, Maine mill. The rebuild project included upgrading the press section and increasing the speed of the paper machine by 500 FPM (150 MPM). The existing original drive system had been installed with sectional AC drives. The original drive system was becoming more difficult to maintain due to unavailability of parts and the out-of-date diagnostic system. The revamp involved the re-use of 76 existing drives and the installation of 8 new AC sectional drives. A new master controller was added with an enhanced diagnostic HMI. The new master controller architecture communicated with, controlled and diagnosed the old drives as well as the new drives. The unique combination of existing drives and new drives formed a cohesive system with all of the advantages of a new drive system. A staged installation was performed to reduce the outage time impact. The paper machine rebuild project was completed in March 2003 and has met the expectations of a successful revamp. © 2004 IEEE.

关键词： Papermaking machinery

来源：评论

学校读者我要写书评

暂无评论

A novel approach to proactive human-robot cooperation

A novel approach to proactive human-robot cooperation

引用

IEEE International Workshop on Robot and Human Communication (ROMAN)

作者： O.C. Schrempf U.D. Hanebeck A.J. Schmid H. Worn Intelligent Sensor-Actuator-Systems Laboratory Institute of Computer Science and Engineering Universität Karlsruhe Karlsruhe Germany Institute for Process Control and Robotics Universität Karlsruhe Karlsruhe Germany

This paper introduces the concept of proactive execution of robot tasks in the context of human-robot cooperation with uncertain knowledge of the human's intentions. We present a system architecture that defines the necessary modules of the robot and their interactions with each other. The two key modules are the intention recognition that determines the human user's intentions and the planner that executes the appropriate tasks based on those intentions. We show how planning conflicts due to the uncertainty of the intention information are resolved by proactive execution of the corresponding task that optimally reduces the system's uncertainly. Finally, we present an algorithm for selecting this task and suggest a benchmark scenario.

关键词： Robot sensing systems Intelligent robots Uncertainty Application software Humanoid robots Human robot interaction Bayesian methods Intelligent sensors Laboratories Computer science

来源：评论

学校读者我要写书评

暂无评论

APPLICATION OF GENEALOGICAL DECISION TREES FOR OPEN-LOOP TRACKING control

引用

IFAC Proceedings Volumes 2005年第1期38卷 288-293页

作者： Enso Ikonen Kaddour Najim Pierre Del Moral Systems Engineering Laboratory Department of Process and Environmental Engineering P.O.Box 4300 FIN-90014 University of Oulu Finland fax. 358-8 553 2439 Process Control Laboratory E.N.S.I.A.C.E.T. 118 route de Narbonne 31077 Toulouse cedex 4 France Fax: (+33) 5 6288 5600 Phone: (+33) 5 6288 5847 Laboratoire de Statistiques et Probabilites Toulouse France

A new approach based on a genealogical decision tree is suggested for solving an open-loop tracking problem. The algorithm associates Gaussian distributions to both the norms of the control actions and the tracking errors. It solves the optimization problem sequentially, using random resampling from a population of solutions. This stochastic search model can be interpreted as a simple genetic particle evolution model with a natural birth and death interpretation. It converges in probability. Two numerical examples, dealing with rapid thermal processing and robotics, illustrate the feasibility and the performance of this control algorithm.

关键词： Monte Carlo method optimal control optimization problems population-based search

来源：评论

学校读者我要写书评

暂无评论

MICRON: Small Autonomous Robot for Cell Manipulation Applications

MICRON: Small Autonomous Robot for Cell Manipulation Applica...

引用

IEEE International Conference on Robotics and Automation (ICRA)

作者： J. Brufau M. Puig-Vidal J. Lopez-Sanchez J. Samitier N. Snis U. Simu S. Johansson W. Driesen J.-M. Breguet J. Gao T. Velten J. Seyfried R. Estana H. Woern Instrumentation and Communication Systems Laboratory Universitat de Barcelona Barcelona Spain Laboratoir de Systèmes Robotiques Swiss Federal Institute of Technology Lausanne Switzerland Department of Engineering Sciences Uppsala University Uppsala Fraunhofer Institute of Biomedical Engineering Saint Ingbert Germany Inst. for Process Control and Robotics Universität Karlsruhe Karlsruhe Germany

Manipulating in the micro- or even nano world still poses a great challenge to robotics. Conventional (stationary) systems suffer from drawbacks regarding integration into process supervision and multi-robot approaches, which become highly relevant to fight scaling effects. This paper describes work currently being carried out which aims to make automated manipulation of micrometer-scaled objects possible by robots with nanometer precision. The goal is to establish a small cluster of (up to five) micro robots equipped with on-board electronics, sensors and wireless power supply. Power autonomy has been reached using inductive energy transmission from an external wireless power supply system or a battery based system. Electronics requirements are fulfilled in the electronic module with the full custom integrated circuit design for the robot locomotion control and the closed loop force control for AFM tool in cell manipulation applications. The maximum velocity obtained is about 0.4 mm/s with a saw tooth voltage signals of 20Vpp and 2500 Hz. In order to keep a AFM tool on micro-robot a specific tip with integrated piezoresistance, instead of the classical laser beam methodology, is validated for force measurement.

关键词： Robotics and automation Robot sensing systems Wireless sensor networks Power supplies Force control Batteries Application specific integrated circuits Robot control Teeth Voltage

来源：评论

学校读者我要写书评

暂无评论

Approximation of surface texture profiles

引用

Journal of Physics: Conference Series 2005年第1期13卷

作者： J K Brennan A Crampton X Jiang R Leach P Harris School of Computing and Engineering University of Huddersfield UK Division of Engineering & Process Control National Physical Laboratory UK Mathematics and Scientific Software Group National Physical Laboratory UK

In this paper we are interested in the approximation of continuous surface texture profiles defined only at discretely obtained points. A continuous representation is required in order to be able to apply filtration methods that assume uniform data spacing to practical data that in general is not uniformly spaced. By reconstructing surface profiles as natural cubic spline interpolants accurately using numerically stable fitting algorithms, we can provide a mathematically sound basis on which to compute surface texture profile parameters. As an important direct benefit, parameters involving the integrals of surface profiles can be calculated directly from the spline interpolant. Examples are given to illustrate the advantages of using this reconstruction method.

关键词：

来源：评论

学校读者我要写书评

暂无评论

A receding optimization control policy for production systems with quadratic inventory costs 7th

A receding optimization control policy for production system...

引用

7th International Symposium on Advanced control of Chemical processes, ADCHEM 2003

作者： Song, Chunyue Wang, Hui Li, Ping Institute of Industrial Process Control Zhejiang University Hangzhou310027 China Institute of Systems Engineering Zhejiang University Hangzhou310027 China

For stochastic disturbance, such as stochastic demands and breakdown of the system, the production systems is presented as a piecewise deterministic process model. At any given time only one type of product can be produced by the system. A setup (with setup time and cost) is required if production is to be switched from one type of product to another. Preventive maintenance activity is performed for reducing the aging of the system, and the jump rates of the system state depend on the aging of the system. The objective of the problem is to minimize the costs of setup, production, maintenance and the quadratic costs of inventory. The decision variables are a sequence of setups and the production and preventive maintenance plan. According to two time horizons, the original problem is decomposed into two sub-problems. The asymptotic optimality solution of the original problem is constructed via receding optimize the sub-problems. Simulation results show the feasibility of the proposed approach in practice. © 2004 IFAC

关键词： Dynamic programming

来源：评论

学校读者我要写书评

暂无评论

Estimation of evolutionary spectrum based on short time Fourier transform and modified group delay

Estimation of evolutionary spectrum based on short time Four...

引用

作者： Narasimhan, S.V. Pavanalatha, S. Digit. Sign. Process./Systems Group Aerospace Electronics Division National Aerospace Laboratories Bangalore 560017 India Dept. of Electronics Engineering National Institute of Technology Karnataka Surathkal 575025 India Digit. Sign. Process./Telemetry Grp. Aerospace Electronics Division National Aerospace Laboratories Bangalore 560017 India

This paper proposes a new estimator for evolutionary spectrum (ES) based on short time Fourier transform (STFT) and modified group delay function (GDFM). The STFT due to its built-in averaging suppresses the crossterms and the GDFM preserves the frequency resolution of the rectangular window as it reduces the Gibbs ripple without using any window function. The new estimator is applicable to random signals as the GDFM removes the effect of the zeros due to input noise driving the time-varying system and provides the system information effectively. The GDFM also provides signal-to-noise ratio enhancement as it removes the zeros due to the associated noise. The performance of the method is illustrated for linear chirp signals, frequency shift keying and for time-varying random process which indicate that its frequency resolution is better than evolutionary periodogram (EP) and STFT and nearer to that of Wigner Ville distribution. Further, its noise immunity is better than those of EP and STFT. © 2004 Elsevier B.V. All rights reserved.

关键词： Fourier transforms

来源：评论

学校读者我要写书评

暂无评论

A Receding Optimization control Policy for Production systems with Quadratic Inventory Costs

引用

IFAC Proceedings Volumes 2004年第1期37卷 713-717页

作者： Chunyue Song Hui Wang Ping Li Institute of Industrial Process Control Zhejiang University Hangzhou 310027 Institute of Systems Engineering Zhejiang University Hangzhou 310027

关键词： Optimal paroduction Equipment aging Dynamic programming Receding optimization

来源：评论

学校读者我要写书评

暂无评论

A numerical method in optimal production of hybrid stochastic production systems via multi-time scales

A numerical method in optimal production of hybrid stochasti...

引用

WCICA 2004 - Fifth World Congress on Intelligent control and Automation, Conference Proceedings

作者： Song, Chunyue Wang, Hui Li, Ping Natl. Lab. Indust. Contr. Technol. Inst. of Industrial Process Control Zhejiang University Hangzhou 310027 China Institute of Systems Engineering Zhejiang University Hangzhou 310027 China

ISBN: (纸本)0780382730

A hybrid stochastic production system involving fast model and slow model is formulated with multi-time scales. One time scale is 1, the processing time scale, which is frequency and represents fast model. The other time scale is Ε-1, system failure time scale, which is infrequency and indicates slow model of the system. On different time scale, the original system is decomposed into two subsystems. Based on the two subsystems, the optimal control policy of the system is gotten by using approximation numerical technique. Simulation illustrates and confirms the method.

关键词： Production control

来源：评论

学校读者我要写书评

暂无评论

Roll speed and roll gap modelling – A case study for an experimental rolling mill

引用

IFAC Proceedings Volumes 2004年第15期37卷 5-10页

作者： M. Mahfouf Y Y Yang D A Linkens IMMPETUS (Institute for Microstructural and Mechanical Process Engineering: The University of Sheffield) Department of Automatic Control and Systems Engineering University of Sheffield Sheffield SI 3JD UK

In this paper the detailed procedure of model development for a laboratory scale rolling mill (the Hille mill) is given. The main framework of the roll speed and gap model is based on the classic Newton motion equation, with the critical model parameters, such as the inertia of the different rotational parts, the frictions, the stiffness, etc. to be determined by different approaches ranging from analytical to experimental approaches as well as know-how. The developed models have been incorporated into a mill simulation package, and computer simulation results show a good agreement with the actual rolling process. The final goal of the models will be two-fold: to generate a decision support for the upgrading and modernisation of the Hille mill, and to develop advanced model-based rolling control strategies.

关键词： Hot rolling roll speed roll gap modelling simulation mill upgrading

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：