INVESTIGADORES
HAIMOVICH Hernan
congresos y reuniones científicas
Título:
Fault-tolerant control under controller-driven sampling using a virtual actuator strategy
Autor/es:
ESTEBAN N. OSELLA; HERNAN HAIMOVICH; MARÍA M. SERON
Lugar:
Perth
Reunión:
Conferencia; 3rd Australian Control Conference; 2013
Institución organizadora:
University of Western Australia
Resumen:
We present a new output feedback fault tolerant
control strategy for continuous-time linear systems. The strat-
egy combines a digital nominal controller under controller-
driven (varying) sampling with virtual-actuator (VA)-based
controller reconfiguration to compensate for actuator faults. In
the proposed scheme, the controller controls both the plant
and the sampling period, and a fault detection mechanism
performs controller reconfiguration by engaging in the loop
the VA adapted to the diagnosed fault. The VA also operates
under controller-driven sampling. 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 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 operation for all
possible sampling rate evolutions.