Abstract
Distributed real-time systems (DRTSs), such as avionics and automotive systems, are very hard to design and verify. Besides the difficulties of asynchrony, clock skews, and network delays, an additional source of complexity comes from the multirate nature of many such systems, which must implement several levels of hierarchical control at different rates. In this work we present several simple model transformations and a multirate extension of the PALS pattern which can be combined to reduce the design and verification of a virtually synchronous multirate DRTS to the much simpler task of specifying and verifying a single synchronous system. We illustrate the ideas with a multirate hierarchical control system where a central controller orchestrates control systems in the ailerons and tail of an airplane to perform turning maneuvers.
This work was partially supported by Boeing Corporation Grant C8088 and NSF Grant CCF 09-05584.
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Bae, K., Meseguer, J., Ölveczky, P.C. (2013). Formal Patterns for Multi-rate Distributed Real-Time Systems. In: Păsăreanu, C.S., Salaün, G. (eds) Formal Aspects of Component Software. FACS 2012. Lecture Notes in Computer Science, vol 7684. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-35861-6_1
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DOI: https://doi.org/10.1007/978-3-642-35861-6_1
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