检索结果-内蒙古大学图书馆

5th IFAC Symposium on Fault Detection, Supervision and Safety of Technical processes, Safeprocess 2003

作者： Albert, Martin Längle, Thomas Wörn, Heinz Capobianco, Michele Brighenti, Attilio Institute for Process Control and Robotics University of Karlsruhe KarlsruheD-76128 Germany S.A.T.E Srl. Systems and Advanced Technologies Engineering S.r.l Santa Croce 664/a 30135 Germany

Industrial diagnostic systems aim at anticipating the occurrence of failures or, should failures have occurred, at detecting them and identifying their cause. Similar to a process control system, a diagnostic system is closely connected with a specific industrial application. In case of large and complex industrial systems, such intimate link translates into the need to satisfy requirements for modularity, flexibility, and adaptability. This paper introduces a multi-agent software architecture as a possible solution to better tackle the variety of problems connected with building diagnostic systems, based at the requirements connected with modem industrial applications. © 2003 International Federation of Automatic control.

关键词： Multi agent systems

来源：评论

学校读者我要写书评

暂无评论

An Improved Human Machine Interface Modernization for a Combined Cycle Power Plant

引用

IFAC Proceedings Volumes 2003年第20期36卷 231-236页

作者： Alfonso Rivas-Suarez Carlos E. Uribe-Blanco Víctor Alvarez-Cortés Marino Sanchez-Parra Electrical Research Institute Control Systems Division - Process Supervision Department 29-2. P.O. Box 1-425. Cuernavaca Morelos 62001 Mexico

In order to fulfill the Mexican Electric Utility's (CFE) modernization demands, the Electrical Research Institute (IIE) developed at the process Super Vision Department an improved Human Machine Interface (HMI) modernization for a Combined Cycle Power Plant (CCPP) to replace the old one based on VAX workstations with a microcomputer base system using personal computers(pc), maintaining the same functionali1y and integrating management capabilities as well as processing functions currently performed by a proprietary system. The HMI modernization provided to CFE an integral solution through a single interface allowing the system tointerface not only to current proprietary controllers but also to commercial controllers, PLCs or other Intelligent Electronic Device by integrating opc technology. Data analysis is possible in the improved HMI due to a powerful database back-end engine added to the system. Integrating new technology to legacy systems in order to preserve its life span and be able to integrate modem devices represented a challenge to be resolved. This paperalsodescribes how suitable these new technologies promises were accomplished in the IHM modernization. Improvements to the HMI also included an intuitive color-base navigation in a multi-level model. Improvements in communications involved the replacement of the current PC-based communication concentrators with a pair of high performance servers to improve the overall system flexibility and robustness. Among the more challenging tasks was the integration of a modem commercial redundancy system to work with current proprietary controllers.

关键词： man/machine interface microcomputer based system distributed control technology transfer tests

来源：评论

学校读者我要写书评

暂无评论

Application of a Strip Speed Measurement System for Hot Strip Rolling

引用

IFAC Proceedings Volumes 2003年第24期36卷 137-140页

作者： Seong-Cheol Hong Young-Kow Lee Rolling Technology & Process Control Research Group Technical Research Laboratories POSCO Tel: +82-54-220-6316 Electrical and Cumputer Engineering Division POSTECH

To enhance strip thickness accuracy and to improve the mass flow of the head end part of a strip in the 7-stand finishing mill using a hot strip measurement system, this study is being performed. In this paper, the speed measurement system layout and the applications of measured strip speed incluing a neural network for predicting a forward slip and a feed forward automatic control(FF AGC) are given.

关键词： hot rolling mill strip speed measurement system forward slip automatic gage control

来源：评论

学校读者我要写书评

暂无评论

Synthesis of geometric tolerances of a gearbox using a deviation-based tolerance synthesis scheme

Synthesis of geometric tolerances of a gearbox using a devia...

引用

2003 ASME Design engineering Technical Conferences and Computer and Information in engineering Conference

作者： Pramanik, N. Roy, U. Sudarsan, R. Sriram, R.D. Lyons, K.W. Knowledge Based Eng. Laboratory Dept. of Mech. Engineering Syracuse University Syracuse NY 13244 United States Design and Process Group Systems Integration Division Natl. Inst. of Std. and Technology Gaithersburg MD 20899 United States

In this paper a step-by-step procedure for carrying out synthesis of geometric tolerances of a planetary gearbox using a deviation-based tolerance synthesis (TS) scheme has been presented. The TS scheme uses an optimization for minimizing total cost of manufacturing, subject to constraints for assemblability of parts and constraints for functional requirements. The TS work is carried out in several stages. First the gearbox with its nominal dimensions is converted into a model that could serve as input to the synthesis module. Cost functions and constraints equations are then generated using deviation parameters of features. The optimization is carried out using these equations in standard non-linear minimization tools (Matlab) and the optimal deviation parameters are subsequently mapped into suitable tolerance specifications or tolerance zones as per ANSI Y14.5 tolerancing standards.

关键词： Gears

来源：评论

学校读者我要写书评

暂无评论

Near minimax robust control of flexible structures

Near minimax robust control of flexible structures

引用

American control Conference (ACC)

作者： M. Muenchhof T. Singh Department of Mechanical and Aerospace Engineering SUNY at Buffalo Buffalo NY USA Institute of Automatic Control Laboratory of Control Systems and Process Automation Darmstadt University of Technology Darmstadt Germany

This paper presents an approach to calculate prefilters that are insensitive to parameter deviations. The cost function chosen for this approach is the magnitude of the time-delay filter transfer function. By approximating the cost function with a polynomial, the effort of calculating minimax robust profiles can be reduced. The resulting control profiles yield a performance similar to the minimax robust controller. This is verified by the numerical results included in this paper.

关键词： Minimax techniques Robust control Flexible structures Filters Uncertainty Frequency Cost function Vibrations control systems Delay effects

来源：评论

学校读者我要写书评

暂无评论

New in situ sensor modeling approach to measurement validation

New in situ sensor modeling approach to measurement validati...

引用

作者： Srinivasagupta, Deepak Joseph, Babu Morley, Robert E. Process Control Systems Laboratory Department of Chemical Engineering Washington University One Brookings Drive St. Louis MO 63130 United States Electronic Systems Laboratory Department of Electrical Engineering Washington University One Brookings Drive St. Louis MO 63130 United States Department of Chemical Engineering University of South Florida ENB 118 4202 E. Fowler Avenue Tampa FL 33260 United States

Measurement error due to sensor degradation (fouling, miscalibration, etc.) is more difficult to identify compared to catastrophic sensor failure. Passive methods previously proposed for sensor-level monitoring are based on power spectrum or multiscale analysis of sensor data. These methods have limitations caused by not accounting for various noise sources and assumptions about sensor noise characteristics, thus resulting in false and missed alarms. In this paper, an online sensor fault detection scheme based on the identification of sensor response characteristics is proposed and evaluated. We develop both robust passive and active in situ techniques to identify sensor response characteristics that relate directly to its health. Using the identified sensor model, various kinds of sensor faults are quantified and mapped into the model parameters. A dynamic model-based estimator is proposed for data reconciliation. These ideas were experimentally validated using thermocouples, flowmeters, and resistance thermometric devices on laboratory-scale processes. The proposed approach was seen to accurately quantify the sensor model parameters and aid in measurement reconstruction.

关键词： Chemical sensors

来源：评论

学校读者我要写书评

暂无评论

Multi-Agent systems for Industrial Diagnostics

引用

IFAC Proceedings Volumes 2003年第5期36卷 459-464页

作者： Martin Albert Thomas Längle Heinz Wörn Michele Capobianco Attilio Brighenti Institute for Process Control and Robotics University of Karlsruhe D-76128 Karlsruhe S.A.T.E Srl. Systems & Advanced Technologies Engineering s.r.l Santa Croce 664/a 30135

关键词： Agents Complex systems Co-operation Co-ordination De-centralised systems Diagnosis System architectures

来源：评论

学校读者我要写书评

暂无评论

Integrated multi-agent-based supply chain management

Integrated multi-agent-based supply chain management

引用

IEEE International Workshop on Enabling Technologies: Infrastructure for Collaborative Enterprises (WET ICE)

作者： D. Frey P.-O. Woelk T. Stockheim R. Zimmermann Institute for Process Control and Robotics Universität Karlsruhe Karlsruhe Germany Institute for Information Systems University of Frankfurt am Main Frankfurt Germany Institute of Production Engineering University of Hannover Hanover Germany Department of Information Systems FAU Erlangen-Nuernberg Nuremberg Germany

Multi-agent systems (MAS) offer new perspectives compared to conventional, centrally organized architectures in the scope of supply chain management (SCM). Their structure inherently meets the requirements of decentralized supply chains, whereas conventional SCM systems are often restricted in terms of dynamic behavior, handling severe disturbances at supplier sites as well as dealing with highly customized or complex products. Since necessary data are not available within the whole supply chain, an integrated approach for production planning and control taking into account all the partners involved is not feasible. In this paper, a MAS architecture integrating various intelligent agent systems is presented to address the problem.

关键词： Supply chain management Supply chains Manufacturing Production planning Logistics Companies process planning Management information systems Multiagent systems Job shop scheduling

来源：评论

学校读者我要写书评

暂无评论

process dependent choice of diagnostic methods 5

Process dependent choice of diagnostic methods

引用

5th IFAC Symposium on Fault Detection, Supervision and Safety of Technical processes, Safeprocess 2003

作者： Atlas, Erkan Lacatusu, Ciprian C. Capobianco, Michele Gentil, Sylviane Albert, Martin Marcu, Teodor Köppen-Seliger, Birgit University of Duisburg-Essen Institute for Automatic Control Bismarckstr. 81 BB DuisburgD-47048 Germany S.A.T.E Srl. Systems and Advanced Technology Engineering Santa Croce 664/A Duisburg30135 Germany CNRS-INPG-UJF Laboratoire d'Automatique de Grenoble BP 46 Saint-Martin-d'Hères-Cedex38402 France University of Karlsruhe Institute for Process Control and Robotics Kaiserstr.12 KarlsruheD-76I28 Germany

In this contribution one of the concepts of the European Commission research project MAGIC is introduced. Focus is placed on the strategy of choosing diagnostic methods in relation with the characteristics of the industrial process being diagnosed. Normally, only a single diagnostic method is applied for each process or subprocess. The MAGIC project aims at different diagnostic methods to set-up a distributed diagnostic system, and at making the proper choice with respect to the industrial process. The present contribution suggests an approach to the stated problem. © 2003 International Federation of Automatic control.

关键词： Decision support systems

来源：评论

学校读者我要写书评

暂无评论

process Dependent Choice of Diagnostic Methods

引用

IFAC Proceedings Volumes 2003年第5期36卷 471-476页

作者： Erkan Atlas Ciprian C. Lacatusu Michele Capobianco Sylviane Gentil Martin Albert Teodor Marcu Birgit Köppen-Seliger University of Duisburg-Essen Institute for Automatic Control Bismarckstr. 81 BB D-47048 Duisburg S.A.T.E Srl.- Systems and Advanced Technology Engineering Santa Croce 664/A 30135 Venezia Italy CNRS-INPG-UJF Laboratoire d'Automatique de Grenoble BP 46 38402 Saint Martin d'Hères Cedex France University of Karlsruhe Institute for Process Control and Robotics Kaiserstr. 12 D-76I28 Karlsruhe

关键词： Complex systems Fault diagnosis Decision support systems Rule-based systems Fuzzy Logic

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：