Abstract
A hybrid system is a system containing both of time-evolving components and event-driven components. A formal approach is explored in this paper, based on Extended Duration Calculus (EDC), for the development of hybrid systems. A typical example of hybrid system from modern control theory, a two-level adaptive control system, is used for illustrating our approach. Its high level consists of an event-driven supervisor which reacts to the change of plant structure, and its time-evolving low level consists of adaptive controllers and other components. Firstly performance specifications and system specification of the case are formulated in EDC; then they are refined stepwise into specifications of the supervisor and the low level components. Our approach emphasizes the interface between the two kinds of components in the hybrid system.
This research is supported by DeTfoRS Project funded by The National Hi-Tech R & D Programme of China and UNU/IIST.
On leave from Department of Automatic Control, Beijing University of Aeronautics and Astronautics, Beijing 100083, China.
On leave from Department of Computer Science, Changsha Institute of Technology, Changsha 4100T3, China.
On leave from Computer Science Group, Tata Institute of Fundamental Research, Homi Bhabha Road, Bombay 400005, India.
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Xinyao, Y., Ji, W., Chaochen, Z., Pandya, P.K. (1994). Formal design of hybrid systems. In: Langmaack, H., de Roever, WP., Vytopil, J. (eds) Formal Techniques in Real-Time and Fault-Tolerant Systems. FTRTFT ProCoS 1994 1994. Lecture Notes in Computer Science, vol 863. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-58468-4_193
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DOI: https://doi.org/10.1007/3-540-58468-4_193
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