Abstract
Supervisory Control Theory (SCT) is an important framework for establishing formal control of discrete event systems (DES). It is divided into two main approaches: (i) the qualitative approach which studies the DES logical performances with respect to the logical states and events; and (ii) the quantitative approach which is interested in the performance assessment, and introduces “Time” to the untimed DES. This work concerns DES where the elapse of time among the events can affect the system behavior. We recently proposed an untimed approach to distributed supervisory control design and implementation. In this paper, the concept of time observer is introduced to incorporate time dependencies to the proposed approach. The applicability of the proposed method is validated by an experimental Automated Manufacturing System (AMS).
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