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Modern avionic systems are still designed based only on the sensors' measurements, without considering actuator fault scenarios. Acting on several control surfaces, actuators are considered as critical components and therefore, failed actuators can lead to undesirable consequences as degrade performances or even loss of stability during flight. To handle this problem, actuator hardware redundancy...
In this work, we study the detection and estimation problem of sensor and actuator faults (SAF) for nonlinear systems represented by Takagi-Sugeno (T-S) fuzzy models subject to an Unknown Bounded Disturbance (UBD). Simultaneously, we study the estimation of the states. To do this, we design an adaptive descriptor observer to jointly estimate state and SAF vectors. This observer not only lead to estimate...
This article presents a Sliding Mode Observer based Fault Tolerant Control (SMOFTC) applied to a Unified Power Flow Controller (UPFC) to achieve rapid and finite time reference signal tracking of power flow in presence of actuator faults. SMOFTC is a nonlinear control based on a Sliding Mode Observer (SMO), the Lyapunov stability and variable structure control theories to compensate for actuator faults...
In this paper, a Fault Tolerant Control (FTC) strategy for uncertain switched systems that can be used in the case of additive actuator faults is proposed. Sufficient conditions of building an observer are obtained by using multiple Lyapunov function. These conditions are worked out in a simple way, using cone complementarity technique, to obtain new LMIs with slack variables and multiple weighted...
In the present work, we proposed a novel approach which allows the estimation of actuator fault and its compensation correctly for switched hybrid system. So, to thwart the impact of the fault we extended and developed a fault tolerant control (FTC) for switched system. The synthesis of it needs to follow three important steps. The first step, is based on the use of the Data-based Projection Method...
This paper discusses the development of a fault tolerant control (FTC) of permanent magnet DC (PMDC) motor system. Multiple Models Switching and Tuning (MMST) is used along with Linear Quadratic Tracking (LQT) so that system output is able to track a reference signal optimally. This method is applied to the PMDC motor model subjected to actuator faults and the simulation results are presented.
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