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For the control of discrete event systems, the notion of directed control refines that of supervisory control. A directed controller is one that selects at most one controllable event to be enabled at any state (without disabling any uncontrollable event), which is in fact how a discrete event control is implemented. In contrast, a supervisory controller computes a maximal allowable set of controllable...
For the control of discrete-event systems, we introduced the notion of directed control in (J. Huang et al., 2005), where a directed controller, simply referred as director, is one that selects at most one controllable event to be enabled at any instant. In (J. Huang et al., 2006), we developed a framework for the computation of optimal directors and a polynomial synthesis algorithm for acyclic plants...
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