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Online supervisor synthesis for partially observed discrete-event systems

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3 Author(s)
J. H. Prosser ; Dept. of Electr. & Comput. Eng., Drexel Univ., Philadelphia, PA, USA ; M. Kam ; H. G. Kwatny

A partial information supervisor that generates a class of closed controllable and observable sublanguages of a specified “legal” language is presented. This supervisor has the following features: 1) it can be implemented online (i.e., the disabled event set need only be computed once upon each event observation); 2) the computations of the disabled event set can be performed in O(mn) worst case complexity, where a is the number of states in the legal language generator and m is the number of events; 3) an online supervisor presented previously by Heymann and Lin (1993) is a special case of the new supervisor; and 4) all the languages generated by the new supervisor contain the supremal closed controllable and normal (supCCN) sublanguage of the legal language (in fact, they contain a language developed by Fa et al. (1993) that was shown to contain the supCCN sublanguage)

Published in:

IEEE Transactions on Automatic Control  (Volume:43 ,  Issue: 11 )