Focusing qualitative simulation using temporal logic: theoretical foundations

  • Authors:
  • Giorgio Brajnik;Daniel J. Clancy

  • Affiliations:
  • Dipartimento di Matematica e Informatica, Università di Udine, 33100 Udine, Italy E-mail: giorgio@dimi.uniud.it;Department of Computer Sciences, University of Texas at Austin, Austin, Texas 78712, USA E-mail: clancy@cs.utexas.edu

  • Venue:
  • Annals of Mathematics and Artificial Intelligence
  • Year:
  • 1998

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Abstract

We illustrate TeQsim, a qualitative simulator for continuous dynamical systems that combines the expressive power of qualitative differential equations with temporal logic to constrain and refine the resulting predicted behaviors. Temporal logic is used to specify constraints that restrict the simulation to a region of the state space and to specify trajectories for input variables. A propositional linear‐time temporal logic is adopted, which is extended to a three valued logic that allows a formula to be conditionally entailed when quantitative information specified in the formula can be applied to a behavior to refine it. We present a formalization of the logic with correctness and completeness results for the adopted model checking algorithm. We show an example of the simulation of a non‐autonomous dynamical system and illustrate possible application tasks, ranging from simulation to monitoring and control of continuous dynamical systems, where TeQsim can be applied.