Fault Tolerance in Asynchronous Sequential Machines Using Output Feedback Control

• Published in: IEEE transactions on automatic control Vol. 57; no. 6; pp. 1604 - 1609
• Main Author: Yang, Jung-Min
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.06.2012; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Applied sciences; Asynchronous sequential machines; Automatic control; Computer science; control theory; systems; Control system synthesis; Control systems; Control theory. Systems; corrective control; Design engineering; Exact sciences and technology; Fault diagnosis; fault diagnosis and tolerance; Fault tolerant systems; Faults; Modelling and identification; Observers; Output feedback; permanent faults; Redundancy; Tolerances; Transient analysis; corrective control; Redundancy; Feedback regulation; Control synthesis; Asynchronous sequential machines; fault diagnosis and tolerance; Closed feedback; Fault tolerance; permanent faults; Observer; Sequential machine; Asynchronous machine; System identification; Output feedback; Fault diagnostic; Structural analysis
• ISSN: 0018-9286; 1558-2523
• DOI: 10.1109/TAC.2011.2176155

This note presents a control scheme for fault diagnosis and tolerance in asynchronous sequential machines. The considered asynchronous machine is subject to permanent faults, so the system remains in the faulty condition indefinitely after the occurrence of fault inputs. When the machine has a certain structural redundancy, we can design a corrective controller and observer that diagnose faults and compensate the closed-loop system so that it can maintain the normal input/output behavior. The proposed framework is based on the output feedback control scheme and asynchronous techniques.