A (max,+) Algebra for Non-stationary Periodic Timed Discrete Event Systems

We deene and implement a (max,+) algebra of signals for the timing analysis of discrete event systems expressed as timed event graphs. A system is deened by the innnite, periodic time sequences of its events. Each sequence has a nite representations called a signal. The resulting tool can also compute supre-mal controllers for timed discrete event systems.