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9th IEEE International Conference on Emerging Technologies and Factory Automation

作者： Sanz, R Galán, S Rodríguez, M García, C Chinchilla, R Yela, A Univ Politecn Madrid Madrid 28006 Spain

ISBN: (纸本)0780379373

Control systems for process plants are complex applications running in several interacting computers with varying degrees of integration. The construction, deployment and maintenance of the software system is a difficult problem and distributed object oriented technology offers a good way to deal with it. The open standard CORBA provides flexible middleware capable of integrating complex applications in heterogeneous environments, but was originally designed with large business applications in mind and is not perfectly suited for the construction of control systems. Even with recent advances in the real-time specification for CORBA, it is only suitable for soft real-time applications and does not deal with the tight requirements of closed control loops. This paper describes the HRTC project, an experiment of CORBA-based control systems. This project addresses the analysis of the technology and the implementation of two testbeds, one in process control and another one in robot control. The benefits of such technology are discussed.

关键词： distributed process control distributed object computing CORBA transport predictability

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THE USE OF CORBA IN PROCESS CONTROL

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IFAC Proceedings Volumes 2005年第1期38卷 67-72页

作者： Santos Galán Manuel Rodríguez Ricardo Sanz Carlos García Rafael Chinchílla Adolfo Yela ASLAB Universidad Politécnica de Madrid Spain

Present-day control systems in a process plant are composed by a heterogeneous collection of hardware and software entities scattered over a set of heterogeneous platforms. This HW/SW heterogeneity is a source of extreme complexity in the control system regarded as a whole. To implement the new complex control systems distributed object computing (DOC) seems the adequate technology. In the global DOC landscape, CORBA is a well known framework for the construction of modularised, object oriented, distributed applications. The use of CORBA-based control systems (CCS) has been investigated recently with promising results demonstrating the use of CORBA for Process Control Systems.

关键词： Real-Time CORBA Process Control distributed object computing

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Hard Real-Time CORBA (HRTC) for Process Control Systems 2

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IFAC Proceedings Volumes 2004年第1期37卷 719-724页

作者： Santos Galán Manuel Rodríguez Ricardo Sanz ASLAB Universidad Politécnica de Madrid Spain

Control systems for process plants are complex applications running in several interacting computers with varying degrees of integration. The construction, deployment and maintenance of the software system is a difficult problem and distributed object oriented technology offers a good way to deal with it. The open standard CORBA provides flexible middleware capable of integrating complex applications in heterogeneous environments, but was originally designed with large business applications in mind and is not perfectly suited for the construction of control systems. Even with recent advances in the real-time specification for CORBA. it is only suitable for soft real-time applications and do not deal with the tight requirements of closed control loops. In this paper, the building of a process control testbed to identify requirements for CORBA control systems, with both predictable and event-driven transports, is presented. The benefits of such technology are discussed.

关键词： Real-Time CORBA Process Control distributed object computing

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Embedded Component Technology for Complex Control Systems

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IFAC Proceedings Volumes 2008年第2期41卷 6897-6902页

作者： Ricardo Sanz Carlos Martínez Manuel Rodríguez Adolfo Hernando Autonomous Systems Laboratory Universidad Politécnica de Madrid José Gutierrez Abascal 2 28006 Madrid Spain

The question of finding the best technology for software-based controller deployment is still open. One of the main problems is that computing infrastructures for controllers are composed by heterogeneous hardware and software platforms scattered over a set of heterogeneous networkig infrastructures. The standardised object-oriented efforts done around the the OMG specifications try to overcome some of the difficulties raised by this heterogeneity. Inside the distributed object computing (DOC) landscape, CORBA is a well known framework for the construction of modularised, object oriented, distributed applications. The CORBA object model, however, is not enough when confronting the problems related to deplyment, configuration and evolutionary maintenance of systems. This paper describes the ECF component technology specifically built for the construction of component-based, distributed embedded systems.

关键词： Components Real-Time Embedded CORBA CCM distributed object computing

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distributed VIRTUAL MANUFACTURING FOR DEVELOPMENT OF MODULAR MACHINE SYSTEMS

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Journal of Advanced Manufacturing Systems 2002年第2期1卷 141-158页

作者： PETTER OLOFSGÅRD AMOS NG PHILIP MOORE JUNSHENG PU CHI BUI WONG LEO DE VIN Centre for Intelligent Automation Department of Engineering Science Hogskolevägen University of Skövde S-541 28 Skövde Sweden Tel: 0046-500-44-85-19 Fax: +46-500-448598. Mechatronics Research Group Faculty of Computing Sciences and Engineering De Montfort University Leicester LE1 9BH UK

To support all phases of an agile modular manufacturing machine life cycle with CAE and Virtual Manufacturing tools, a number of different engineering applications (e.g. specialist software based tools) are typically used for design, simulation, analysis, programming, control and monitoring of a machine. These applications mainly exist today as small applications islands where each of them manages their own data. When a manufacturing machine is designed, simulated, programmed, analyzed, tested, or operated, the information, connected to that specific machine, used and generated by each application island is stored separately by each application. These application islands often use different storage technologies. Each one of the applications has an information structure to separate the information connected to each machine; however, they do not necessarily use the same information structure. Another issue concerning these applications is the functionality that is implemented in them to manage information; namely, processes such as store, retrieve, search, permissions, etc. The functionality for one process is the same in all applications that has the process implemented. But the implementation of the process functionality may differ, due to misinterpretation of the functionality specification and regular implementation bugs, which could lead to problem with integrity and consistency of the data. Applications that make use of newer information technologies, such as databases and software development tools can simplify the implementation of the functionality but each application still has to implement their own version of the functionality. This paper presents a research investigation focused on the development of a distributed integration platform that supports the whole life cycle of agile modular machine systems, which includes the design, simulation, programming, analysis, machine operation and re-configuration. The environment supports distributed management and s

关键词： VIR-ENG virtual manufacturing distributed object computing object-oriented database management systems modular manufacturing integration infrastructure integration platform concurrent engineering agility

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Analysis and Comparison between Two distributed object Technologies CORBA and DCOM

Analysis and Comparison between Two Distributed Object Techn...

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2004 International Symposium on distributed computing and Applications to Business, Engineering and Science

作者： He keyou,Zhang weilin Department of Computer Science,Wuhan University of Technology, Wuhan,Hubei Provience,China

distributed object computing is the development direction of distributed computing,CORBA and DCOM are two most important distributed object computing *** paper made a deep research on the structure and characteristic of the two technologies,and summarized their advantages and *** also compared the aspects of the structure and regulatory,the ability of astride-platform and integrating different language,the problem of security,invoking method, the degree of separation between Client and Server,the communication protocol and the ***,the two distributed object technologies CORBA and DCOM can be fully understood and their applications can be grasped through comparative study of their similarities and *** a whole,the performance of CORBA is better than DCOM,but DCOM has its advantages,hence, DCOM will exist with CORBA for a long time,and they will cooperate even tightly in the future.

关键词： distributed object computing object- Request Broker COM CORBA DCOM

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QuO's runtime support for quality of service in distributed objects 98

QuO's runtime support for quality of service in distributed ...

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Proceedings of the IFIP International Conference on distributed Systems Platforms and Open distributed Processing

作者： Rodrigo Vanegas John A. Zinky Joseph P. Loyall David Karr Richard E. Schantz David E. Bakken BBN Technologies Cambridge Massachusetts

ISBN: (纸本)9781852330880

Most distributed applications are brittle; they work in a limited environment and cannot adapt to changes in this environment. Making these applications less brittle is a complex engineering task that is hard for specific application areas and even harder to generalize. The Quality objects (QuO) project offers a framework for creating applications that adapt to different Quality of Services (QoS) offered by the underlying resources. QuO offers several layers of tools for creating adaptive distributed applications using the familiar CORBA development process of code generators and runtime support libraries. In this paper we describe the QuO Runtime and the components it uses to maintain and adapt to QoS. The QuO Runtime is the base functionality on which QuO code generators specialize for a specific adaptive application. The QuO Runtime handles much of the complexity of collecting, organizing, and acting on changing QoS, thus reducing the burden for application developers.

关键词： QoS CORBA adaptive programming quality of service distributed object computing

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Addressing the Challenges of HTTP-based Mobile/Cloud Interaction

Addressing the Challenges of HTTP-based Mobile/Cloud Interac...

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IEEE International Conference on Mobile Cloud computing, Services, and Engineering

作者： Jules White Yao Pan Zach McCormick Vanderbilt University

ISBN: (纸本)9781479944248

A new trend is the construction of mobile cyber-physical applications that rely on sensor measurements from multiple mobile devices and back-end processing power in the cloud. Most of these applications use HTTP for network communication, which adds significant data marshaling, threading, synchronization, and other complexities to the device-cloud interactions. This paper presents an architectural approach for using distributed object computing concepts and web sockets to address the key challenges of simultaneously supporting legacy HTTP-based infrastructure and providing simplified mobile/cloud interactions.

关键词： Mobile computing Cloud computing distributed object computing

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The implementation and evaluation of the use of CORBA in an engineering design application

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SOFTWARE-PRACTICE & EXPERIENCE 1999年第14期29卷 1313-1338页

作者： Urban, SD Fu, L Shah, JJ Arizona State Univ Dept Comp Sci & Engn Tempe AZ 85287 USA Arizona State Univ Dept Mech & Aerosp Engn Tempe AZ 85287 USA

Many computer applications today require some form of distributed computing to allow different software components to communicate. Several different commercial products now exist based on the Common object Request Broker Architecture (CORBA) of the object Management Group. The use of such tools, however, often requires the modification of existing systems, rather than the development of new applications. The objective of this research has been to integrate the use of a CORBA tool into an existing engineering design application for the purpose of (1) evaluating the amount of re-engineering that is involved to effectively integrate distributed object computing into an existing application, and (2) evaluating the use and performance of distributed object computing in an engineering domain, which often requires the transfer of large amounts of information. The results of this work demonstrate that CORBA technology can be easily integrated into existing applications. The ease of the integration as well as the efficiency of the resulting system, however, depends upon the degree of modification that developers are willing to consider in the re-engineering process. The most transparent approach to the use of CORBA requires less modification and generally produces less efficient performance. The less transparent approach to the use of CORBA can potentially require significant system modification but produce greater performance gains. This work outlines issues that must be considered for the partitioning of functionality between the client and the server, development of an IDL interface, development of client and server-side wrappers, and support for concurrent, multi-user access. In addition, this work also provides performance and implementation comparisons of different techniques for the use of wrappers and for the transfer of large data files between the client and the server. Performance comparisons for the incorporation of concurrent access are also presented. Copyright

关键词： distributed object computing engineering design software re-engineering efficient file transfer client/server performance analysis

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