|Adaptive Fuzzy Fault Tolerant Control Using Dynamic Sliding Mode
Ali Karami-Mollaee* and Hamed Tirandaz
International Journal of Control, Automation, and Systems, vol. 16, no. 1, pp.360-367, 2018
Abstract : "In this paper, an actuator fault tolerant control (FTC) has been designed using dynamic sliding mode
control (DSMC) for single input nonlinear systems which are affected from uncertainty. In DSMC the switching
of input control signal is removed due to the integrator which is placed before the input control signal of the plant
hence, its result is reducing of chattering. However, in DSMC the augmented system (the system plus the integrator)
is one dimension bigger than the actual system and then, the plant model should be completely known. To overcome
on this problem, an adaptive fuzzy observer (AFO) has been proposed. Finally, we show the combination result of
DSMC and AFO is the compensation of the fault by input control signal of the plant, while the performance and
robustness of the closed loop system are reserved. The main property of the proposed approach is its simplicity and
we only use system output for FTC and moreover, the fault diagnosis (detection, isolation and reconstruction) is
done at the same time. The upper bound of the uncertainty is not used in DSMC and AFO, which is important in
practical implementation. Simulation results show the advantages of the proposed approach."
Keyword : Adaptive fuzzy observer, fault tolerant control, nonlinear system, sliding mode control.