Fault tolerant control for multi-models descriptor systems

In this paper, Fault Tolerant Control (FTC) for a class of nonlinear descriptor systems with actuator faults represented by Multi-Models approach is investigated. The proposed strategy is based on the design of Unknown Input Multi-Observer (UIMO). The considered actuator failures can be lock-in-place or loss of effectiveness. Based on Multi-model approach equipped with unknown input multi-observer to approximate the state vector of the original system and the occurred failures together, a fault tolerant control law is developed to achieve asymptotic output regulation and closed-loop stability, despite the exogenous inputs. A numerical simulation study illustrates the effectiveness of the proposed scheme.