The Quasi-Synchronous Approach to Distributed Control System Design

Crisys "Cooking Book"

Crisys preliminary draft, October 2000.

This report shows how the quasi-synchronous approach arose as a natural evolution going from networks of analog boards to distributed control systems on top of field busses. Primarily designed for continuous control, it progressively extends toward hybrid control and then raises synchronization problems, the more so as safety critical systems are considered. We propose here design, validation and fault tolerance methods adapted to this approach.

Postscript