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Integration of invariant‐set‐based FDI with varying sampling rate virtual actuator and controller
Author(s) -
Osella Esteban N.,
Haimovich Hernan,
Seron María M.
Publication year - 2016
Publication title -
international journal of adaptive control and signal processing
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.73
H-Index - 66
eISSN - 1099-1115
pISSN - 0890-6327
DOI - 10.1002/acs.2551
Subject(s) - setpoint , control theory (sociology) , control reconfiguration , controller (irrigation) , open loop controller , actuator , fault detection and isolation , sampling (signal processing) , computer science , fault tolerance , control engineering , engineering , detector , control (management) , artificial intelligence , closed loop , embedded system , telecommunications , distributed computing , agronomy , biology
Summary We present a new output feedback fault‐tolerant control strategy for continuous‐time linear systems with bounded disturbances. The strategy combines a digital nominal controller under controller‐driven (varying) sampling with virtual actuator (VA)‐based controller reconfiguration to compensate for abrupt actuator faults and invariant‐set‐based fault detection and isolation. Two independent objectives are considered: (a) closed‐loop stability with setpoint tracking and (b) controller reconfiguration under faults. Our main contribution is to extend an existing fault detection and isolation and VA‐based controller reconfiguration strategy to systems under controller‐driven sampling in such a way that if objective (a) is possible under controller‐driven sampling (without VA) and objective (b) is possible under uniform sampling (without controller‐driven sampling), then closed‐loop stability and setpoint tracking will be preserved under both healthy and faulty operations for any possible sampling rate evolution that may be selected by the controller. Copyright © 2015 John Wiley & Sons, Ltd.