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Reliable decentralized supervisory control of discrete event systems
Summary
This study introduces reliable decentralized supervisory control, ensuring system specifications are met even with local supervisor failures. It provides conditions for achieving this reliability and methods to handle cases where it
Area of Science:
- Control Theory
- Computer Science
- Discrete Event Systems
Background:
- Decentralized supervisory control manages complex systems using multiple local supervisors.
- Existing methods may not guarantee performance under local supervisor failures.
- The need for robust control strategies in distributed systems is critical.
Purpose of the Study:
- To formulate and analyze the reliable decentralized supervisory control problem.
- To define k-reliability, indicating the number of local supervisors that can fail.
- To establish conditions for the existence of k-reliable decentralized supervisors.
Main Methods:
- Development of necessary and sufficient conditions for k-reliable decentralized supervisor existence.
- Algorithm for computing a sublanguage of the specification to ensure k-reliability.
- Synthesis of a k-reliable decentralized supervisor using a coordinator without altering the specification.
Main Results:
- Characterization of the existence of k-reliable decentralized supervisors.
- A method to adapt specifications to meet k-reliability requirements.
- A coordinator-based approach to synthesize k-reliable supervisors.
Conclusions:
- The study provides a theoretical framework for reliable decentralized supervisory control.
- Practical methods are offered to address scenarios where direct k-reliability is not initially achievable.
- This work enhances the robustness of discrete event systems in the presence of failures.
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