Journal
IEEE SYSTEMS JOURNAL
Volume 13, Issue 1, Pages 940-951Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSYST.2017.2759257
Keywords
Actuator faults; fault detection (FD); functional observers; interconnected systems; residual generators; time-delay systems; unknown inputs
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This paper presents a novel distributed functional observer based fault detection (FD) scheme for interconnected time-delay systems with unknown inputs. The scheme employs a set of stand-alone residual generators, one at each subsystem, to detect actuator faults in the system. At each subsystem, depending on the strength of the interactions amongst the subsystems, a residual generator is designed by utilizing either a reduced-order distributed or decentralized functional observer. Our FD scheme offers several advantages in terms of simplicity due to the deployment of stand-alonereduced-order functional observers, and reliability owing to the independence of the operation of each residual generator. Two numerical examples are given to illustrate the effectiveness of our proposed FD scheme.
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