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On deadlock-free modular supervisory control of discrete-event systems

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1 Author(s)
Yonghua Li ; Dept. of Electr. & Comput. Eng., Wayne State Univ., Detroit, MI, USA

In this paper the problem of synthesizing deadlock-free modular supervisors for discrete-event systems is discussed. By introducing the d-invariant relation between a pair of supervisors, it is shown that when the control objective is described in terms of intersection of two languages, a necessary and sufficient condition for the modular supervisor to be deadlock-free is that this pair of subsupervisors satisfies a d-invariant relation. A procedure for synthesizing the deadlock-free modular supervisor is presented. Some issues concerning deadlock-free modular supervisory control are also discussed

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Automatic Control, IEEE Transactions on  (Volume:42 ,  Issue: 12 )