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Discrete Supervisory Control of Hybrid Systems Based on l-Complete Approximations

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Abstract

The topic of this paper is the synthesis of discrete supervisory control for hybrid systems Σ with discrete external signals. Such systems are in general neither l-complete nor can they be represented by finite state machines. Our solution to the control problem is as follows: we find the strongest l-complete approximation (abstraction) Σl for Σ, represent it by a finite state machine, and investigate the control problem for the approximation. If a solution exists on the approximation level, we synthesize the maximally permissive supervisor for Σ l . We show that it also solves the control problem for the underlying hybrid system Σ. If no solution exists, approximation accuracy can be increased by computing the strongest k-complete abstraction Σ k , k > l. The basic ideas regarding the approximation step are explained within the framework of Willems' behavioral systems theory. Implementation issues are treated in a state space framework, and the main results are interpreted from a traditional control engineering point of view.

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Moor, T., Raisch, J. & O'Young, S. Discrete Supervisory Control of Hybrid Systems Based on l-Complete Approximations. Discrete Event Dynamic Systems 12, 83–107 (2002). https://doi.org/10.1023/A:1013339920783

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