Passive Robust Fault Detection Approaches Using Interval Models

Modeling and fault tolerant control of an electro-hydraulic actuator

“…Then the process follows direct estimation or numerical optimization. In another case, passive robust fault detection was presented by Puig and Quevedo [12] by bounding the uncertainties in intervals, known as 'interval model'. Process model-based fault detection was also evaluated using residual analysis [13].…”

Robust Fault Detection with Unknown-Input Interval Observers using Zonotopes

“…Moreover, there might be too many disturbances to be decoupled due to the lack of freedom degrees. An alternative strategy is to consider modeling errors as unknown disturbances, and to propagate and bound their effect on the residual, using for example interval methods as in Puig et al (2002). This will be the approach followed in this paper to handle modeling uncertainties.…”

Actuator-fault detection and isolation based on set-theoretic approaches

“…In the literature, there exist different types of set-theoretic FD approaches: the set-valued observer [4], the set-membership state estimation [5,6], the invariant set-based [7,8] and the interval observer-based approaches [2,3]. Regarding fault isolation (FI), interval observers (or other related techniques such as the set-membership estimation) generally turn to other FI techniques such as the fault signature matrix approach [9,10]. So far, few works have been addressed for the FI application of interval observers, especially when considering that one wants to obtain guaranteed FI once the considered actuator faults affect the system.…”