Hybrid Multirate PALS
Multirate PALS reduces the design and verification of a virtually synchronous distributed real-time system to the design and verification of the underlying synchronous model. This paper introduces Hybrid Multirate PALS, which extends Multirate PALS to virtually synchronous distributed multirate hybrid systems, such as aircraft and power plant control systems. Such a system may have interrelated local physical environments, each of whose continuous behaviors may periodically change due to actuator commands. We define continuous interrelated local physical environments, and the synchronous and asynchronous Hybrid Multirate PALS models, and give a trace equivalence result relating a synchronous and an asynchronous model. Finally, we illustrate by an example how invariants can be verified using SMT solving.
José Meseguer has been a mentor and role model for both of us. We would like to thank you, José, for showing us how beautiful, and at the same time practical, theoretical computer science can be. We thank you for your exemplary guidance and your support throughout our research careers. But first and foremost, we thank you for many years of true friendship.
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