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Incremental modeling and verification of flexible manufacturing systems

JOURNAL OF INTELLIGENT MANUFACTURING 1999年第6期10卷 485-502页

作者： Wang, JC Deng, Y Florida Int Univ Sch Comp Sci Miami FL 33199 USA

An FMS is a typical real-time concurrent system composed of a number of computer-controlled machine tools, automated material handling and storage systems that operate as an integrated system under the control of host computer(s). The growing demand for higher performance and flexibility in these systems and the interlocking factors of concurrency, deadline-driven activities, and real-time decision making pose a significant challenge to FMS design, especially in terms of control and scheduling. A formal engineering approach that helps handle the complexity and dynamics of FMS modeling, design and analysis is needed. A real-time architectural specification (RAS) model and its application in the modeling of flexible manufacturing system (FMS) are presented. RAS combines mature operational and descriptive formal methods, in particular time Petri nets (TPN) and real-time computational tree logic (RTCTL), to form an integrated system model for architectural specification and analysis of real-time concurrent systems such as FMS. The contribution of RAS is twofold: First, it provides a formal system to systematically maintain a strong correlation between (real-time) requirements and design and to verify the conformance of the design to the requirements, which helps enhance traceability and thus to help us to achieve high assurance in design. Second, it offers better scalability in modeling and analysis, which provides an effective way to deal with complexity in the application of formal methods. These two features together make RAS a suitable model for the design of FMS.

关键词： formal system design real-time systems time Petri nets real-time computational tree logic flexible manufacturing systems

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Introducing software architecture specification and analysis in SAM through an example

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INFORMATION AND SOFTWARE TECHNOLOGY 1999年第7期41卷 451-467页

作者： Wang, J He, X Deng, Y N Dakota State Univ Dept Comp Sci Fargo ND 58105 USA Florida Int Univ Sch Comp Sci Miami FL 33199 USA

Software architecture study has become one of the most active research areas in software engineering in the recent years. Although there have been many published results on specification and analysis method of software architectures, information on sound systematic methodology for modeling and analyzing software architectures is lacking. In this article, we present a formal systematic software architecture specification and analysis methodology called SAM and show how to apply SAM to specify a command control (C2) system and to analyze its real-time constraints. (C) 1999 Elsevier Science B.V. All rights reserved.

关键词： software architecture formal methods real-time concurrent systems time Petri nets real-time computational tree logic command and control systems

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Integrated architectural modeling and analysis for high-assurance command and control system design 3

Integrated architectural modeling and analysis for high-assu...

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3rd IEEE International High-Assurance Systems Engineering Symposium

作者： Deng, Y Wang, JC Florida Int Univ Sch Comp Sci Miami FL 33199 USA

ISBN: (纸本)0818692219

A real-time Architectural Specification (RAS) approach and its application to command and control (C2) systems are presented The objective is to establish a formal foundation that will enable us to integrate existing rich but fragmented formal techniques for system specification and verification into practical and scaleable formal engineering methods to support the design and development of highly reliable real-time distributed systems. The contribution of RAS is twofold: First, it provides a formal system that integrates system's timing requirements and the propagation of the requirements into the process of architectural modeling and design and provides a systematic way to enforce that the requirements are met in every step of the design process. Second, it offers an incremental and more scaleable approach for design modeling. These two features together make RAS a suitable model for the design of C2 systems. Based on these features, we further present an incremental method for verifying timing properties of a RAS model that helps to reduce the complexity of analysis both at a given design level or across different design levels.

关键词： software architecture formal methods realtime concurrent systems time Petri nets real-time computational tree logic command and control systems

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