CIFASIS   20631
CENTRO INTERNACIONAL FRANCO ARGENTINO DE CIENCIAS DE LA INFORMACION Y DE SISTEMAS
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Virtual-actuator-based Fault-tolerant Control for Linear Systems with Controller-driven Sampling
Autor/es:
ESTEBAN N. OSELLA; HERNAN HAIMOVICH; MARÍA M. SERON
Lugar:
Bariloche
Reunión:
Congreso; XV Reunión de Trabajo en Procesamiento de la Información y Control; 2013
Institución organizadora:
Universidad Nacional de Río Negro
Resumen:
We present a fault tolerant control strategy for linear sampled-data systems with bounded perturbations, which combines set-based fault detection and isolation (FDI) with controller reconfiguration based on virtual actuators. The controller, the virtual actuators and the FDI unit operate under variable sampling rate, a feature that allows the overall closed-loop system to be regarded as a discrete-time switched system. Using recent techniques to compute invariant sets for switched systems, we compute ?healthy? and ?faulty? sets that the FDI unit utilises to diagnose actuator faults. Correct FDI, guaranteed by the separation between these sets, and consequent controller reconfiguration using a virtual actuator adapted to the diagnosed fault situation ensure the preservation of boundedness and tracking properties both under healthy and faulty conditions.