Fault-tolerant Control Systems

Sensor fault detection and isolation filter for polytopic LPV systems: A winding machine application

“…If multiple faults appear at exactly the same time (very small probability), then the fault isolation is not guaranteed but the fault detection is still working. The winding process, (Noura et al, 2009) …”

“…Note that an input-output linearizing control law, based on the polynomial model, has been implemented (as in (Noura et al, 2009)) using nonlinear theoretical development from (Fossard and Normand-Cyrot, 1995) and (Isidori, 1995): it is essential since this system is unstable in open loop. It can be verified through the computation of eigenvalues of various matrices A j presented in Appendix.…”

Adaptive wide-area closed-loop undervoltage load shedding using synchronized measurements

“…This is referred to in Control Systems literature as fault detection and isolation [19]; • or it is not informed, and we rely on the closed-loop structure to compensate for the failure. Figure 12 provides the system responses without failure, with failure and detection, and with undetected failure, respectively.…”

Relaxed formulation of the design conditions for Takagi-Sugeno fuzzy virtual actuators

“…To increase the reliability of systems, fault tolerant control (FTC) usually fix a system with faults for continuing its mission, while different approaches were studied in FTC design (see, e.g., [1], [3], [15], [21], [23] and the references therein). The standard approach to control reconfiguration discards the nominal controller from the control loop and replace it with a new one with re-tuned parameters, to recover in a certain extent the performance of the fault-free control system [14], [17], [24].…”