By Filipe de Carvalho Moutinho, Luís Filipe Santos Gomes
This publication describes a model-based improvement strategy for globally-asynchronous locally-synchronous dispensed embedded controllers. This method makes use of Petri nets as modeling formalism to create platform and community autonomous types aiding using layout automation instruments. To aid this improvement technique, the Petri nets type in use is prolonged with time-domains and asynchronous-channels. The authors’ strategy makes use of versions not just offering a greater knowing of the allotted controller and bettering the verbal exchange one of the stakeholders, but additionally to manage to help the complete lifecycle, together with the simulation, the verification (using model-checking tools), the implementation (relying on automated code generators), and the deployment of the dispensed controller into particular platforms.
- Uses a graphical and intuitive modeling formalism supported by way of layout automation tools;
- Enables verification, making sure that the disbursed controller used to be properly specified;
- Provides flexibility within the implementation and upkeep levels to accomplish wanted constraints (high functionality, low strength intake, decreased costs), permitting porting to various structures utilizing diverse verbal exchange nodes, with no altering the underlying behavioral model.
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Additional resources for Distributed Embedded Controller Development with Petri Nets: Application to Globally-Asynchronous Locally-Synchronous Systems
This model-checking tool enables the visualization of small state-spaces, such as the one presented in Fig. 6. Given that the model has 160 states, it is too big to be presented in a readable single page, and therefore an incomplete state-space is presented. To analyze state-spaces of arbitrary magnitude (small and large), this model-checking tool relies on a query engine, which enables the creation of queries that will be answered during the state-space generation, allowing the verification of additional proprieties.
2007b; Pereira and Gomes 2013). To create the sub-models of each component (with a specific time-domain), the algorithm: • reads the PNML file of the global GALS-DEC model; • removes the nodes (places and transitions) that do not have the time-domain of that component; • removes the arcs that were connected to the removed nodes; • removes the asynchronous-channels and introduces: (1) additional sub-models; and (2) additional input events and output events (to specify the interaction between the components and the communication nodes); • saves the resulting sub-models into a new PNML file.
2006), proposed to model and analyze GALS systems, propose the use of (buffer) places to specify the interaction among synchronous components. Such as with shared places, the use of buffer places specify the asynchronous communication among components. To conclude, it is important to note that none of the mentioned channel mechanisms support the network-independent specification of distributed GALS controllers. Synchronous channels (symmetrical or asymmetrical/directed) specify communication in zero time delay, not supporting the asynchronous interaction among distributed controllers (with communication time different from zero).
Distributed Embedded Controller Development with Petri Nets: Application to Globally-Asynchronous Locally-Synchronous Systems by Filipe de Carvalho Moutinho, Luís Filipe Santos Gomes