Probabilistic Constraint Nets: Constraint-Based Approach to Modeling and Verification of Hybrid Systems with Uncertainty

نویسندگان

  • Robert St-Aubin
  • Alan K. Mackworth
چکیده

Due to the recent technological advances, real-time hybrid dynamical systems are becoming ubiquitous. Most of these systems behave unpredictably, and thus, exhibit uncertainty. Hence, a formal framework to model systems with unpredictable behaviours is needed. We develop Probabilistic Constraint Nets (PCN), a new framework that can handle a wide range of uncertainty, whether it be probabilistic, stochastic or nondeterministic. In PCN, we view probabilistic dynamical systems as online constraintsolvers for dynamic probabilistic constraints and requirements specification as global behavioural constraints on the systems. We demonstrate the power of PCN by applying it to a fully hybrid model of an elevator system which encompasses several different types of uncertainty. We present verification rules, which have been fully implemented, to perform automatic behavioural constraint verification.

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تاریخ انتشار 2004