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Symbolic State-Space Exploration and Guard Generation in Supervisory Control Theory

Zhennan Fei (Institutionen för signaler och system, Automation) ; Sajed Miremadi (Institutionen för signaler och system, Automation) ; Knut Åkesson (Institutionen för signaler och system, Automation) ; Bengt Lennartson (Institutionen för signaler och system, Automation)
Agents and Artificial Intelligence (Third International Conference, ICAART 2011, Rome, Italy, January, 28-30, 2011. Revised Selected Papers) (1865-0929). Vol. 271 (2013), p. 161-175.
[Konferensbidrag, refereegranskat]

Supervisory Control Theory (SCT) is a model-based framework for automatically synthesizing a supervisor that minimally restricts the behavior of a plant such that given specifications is fulfilled. The main obstacle which prevents SCT from having a major industrial breakthrough is that the supervisory synthesis, consisting of a series of reachability tasks, suffers from the state-space explosion problem. To alleviate this problem, a well-known strategy is to represent and explore the state-space symbolically by using Binary Decision Diagrams. Based on this principle, an alternative symbolic state-space traversal approach, depending on the disjunctive partitioning technique, is presented in this paper. In addition, the approach is adapted to the prior work, the guard generation procedure, to extract compact propositional formulae from a symbolically represented supervisor. These propositional formulae, referred to as guards, are then attached to the original model, resulting in a modular and comprehensible representation of the supervisor.

Nyckelord: Binary decision diagrams, Partitioning techniques, Propositional formulae , State-space exploration , Supervisory control theory



Denna post skapades 2015-05-04.
CPL Pubid: 216220

 

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Institutioner (Chalmers)

Institutionen för signaler och system, Automation

Ämnesområden

Elektroteknik och elektronik

Chalmers infrastruktur