On the use of Bio-PEPA for modelling and analysing collective behaviours in swarm robotics
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In this paper we analyse a swarm robotics system using Bio-PEPA. Bio-PEPA is a process algebra language originally developed to analyse biochemical systems. A swarm robotics system can be analysed at two levels: the macroscopic level, to study the collective behaviour of the system, and the microscopic level, to study the robot-to-robot and robot-to-environment interactions. In general, multiple models are necessary to analyse a system at different levels. However, developing multiple models increases the effort needed to analyse a system and raises issues about the consistency of the results. Bio-PEPA, instead, allows the researcher to perform stochastic simulation, fluid flow (ODE) analysis and statistical model checking using a single description, reducing the effort necessary to perform the analysis and ensuring consistency between the results. Bio-PEPA is well suited for swarm robotics systems: by using Bio-PEPA it is possible to model distributed systems and their space-time characteristics in a natural way. We validate our approach by modelling a collective decision-making behaviour.
KeywordsSwarm robotics Modelling Bio-PEPA Fluid flow analysis Statistical model checking
The research leading to the results presented in this paper has received funding from the European Research Council under the European Union’s Seventh Framework Programme (FP7/2007–2013)/ERC grant agreement no. 246939, and by the EU project ASCENS, 257414. Manuele Brambilla, Mauro Birattari and Marco Dorigo acknowledge support from the F.R.S.-FNRS of Belgium’s Wallonia-Brussels Federation. Diego Latella has been partially supported by Project TRACE-IT—PAR FAS 2007–2013—Regione Toscana. The authors would like to thank Stephen Gilmore and Allan Clark (Edinburgh University) for their help with the Bio-PEPA tool suite and templates.
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