Fault-tolerant tracking control strategy for a class of switching systems with actuator faults
Résumé
In this work, an active Fault Tolerant Tracking
Control (FTTC) scheme is proposed for a class of switched
system affected by actuator faults with the presence of Unknown
Bounded Disturbances (UBD). In this fault tolerant tracking
control strategy, a Switched Adaptive Observer (SAO) is designed
to estimate both the system states and the actuator fault
signal simultaneously. Based on these estimations, an active fault
tolerant tracking controller whose control law is described by
an adaptive Proportional Integral Derivative (PID) structure
is designed. Applying the Average Dwell Time (ADT) concept
and the Lyapunov stability theory a new theoretical study is
developed, which allows formalizing the SAO-based PID-FTTC
design in the form of Linear Matrix Inequalities (LMI). Finally,
a simulation example is given to illustrate the effectiveness of the
presented scheme.