Browsing by Author "Zhou, MC"

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An application of Petri nets to supervisory control for human-computer interactive systems
(2005-10-01)
Lee, JS
;
Zhou, MC
;
Hsu, PL
;
電控工程研究所
;
Institute of Electrical and Control Engineering
In a distributed robotic system, both human-controlled (semi-autonomous) and computer-controlled (fully autonomous) robots may simultaneously exist. From the global system's point of view, supervisory control for the interactions between the human and computer are important and necessary. For such human-computer interactive systems, this paper proposes a supervisory framework to guarantee that both human and computer commands meet collision-free and deadlock-free requirements. In the presented approach, Petri nets are applied to construct a system model and synthesize a desired supervisor. An application to a two-robot remote surveillance system is provided to demonstrate the practicability of the developed supervisory control approach. It is believed that the technique developed in this paper is significant in the industrial practice.
Petri net-based design of modular supervisors for remotely human control systems
(2004)
Lee, JS
;
Zhou, MC
;
Hsu, PL
;
電控工程研究所
;
Institute of Electrical and Control Engineering
In an Internet-based control system, particular human operations may violate desired requirements and lead to destructive failure. For such human-in-the-loop systems, this paper extends the remote supervisory scheme in [5] to a modular one so as to reduce the supervisor synthesis complexity. Also, remote human issued commands are guaranteed to meet required specifications. A rapid thermal process in semiconductor manufacturing systems is provided to show the practicability of the proposed approach.