AN EFFICIENT ALGORITHM FOR CONTROLLER SYNTHESIS UNDER FULL OBSERVATION

This paper presents a simple and flexible on-line synthesis algorithm that derives the optimal controller for a given environment. It consis ts of finding the greatest possible number of admissible event sequenc es of a discrete-event system with respect to a requirements specifica tion. It generates and explores the slate space on-the-fly and uses a control-directed backtracking technique. Compared to a previous algori thm of Wonham and Ramadge, pur algorithm does not require explicit sto rage of the entire work space and backtracks on paths of arbitrary len gth to prune the search space more efficiently. This paper also discus ses an implementation of our algorithm and includes an evaluation of i ts performance on a variety of problems. (C) 1997 Academic Press.