Adel Tellili

Institut Supérieur des Etudes Technologiques de Djerba | ISET · génie électrique

This work presents fault-tolerant control of two-time-scale systems in both linear and nonlinear cases. An adaptive approach for fault-tolerant control of singularly perturbed systems is used in linear case, where both actuator and sensor faults are examined in the presence of external disturbances. For sensor faults, an adaptive controller is desi...

This paper presents the fault tolerant control (FTC) of a flexible joint robot using singular perturbation method in order to compensate for the lost performance due to the occurrence of actuator fault and the uncertainty. This FTC is based on Lyapunov redesign principle. The singular perturbation method is used to reduce the dynamic model of the f...

This paper presents the design of an additive fault tolerant control for nonlinear time-invariant singularly perturbed systems against actuator faults based on Lyapunov redesign principle. The overall system is reduced into subsystems with fast and slow dynamic behavior using singular perturbation method. The time scale reduction is carried out whe...

This paper studies the fault tolerant control, adaptive approach, for linear time-invariant two-time-scale and three-time-scale singularly perturbed systems in presence of actuator faults and external disturbances. First, the full order system will be controlled using ε-dependent control law. The corresponding Lyapunov equation is ill-conditioned d...

This paper deals with the adaptive fault tolerant control for linear time-invariant singularly perturbed systems against actuator failures and external disturbances. By time-scale decomposition using singular perturbation method, the full-order system is decomposed into slow and fast subsystems. An ϵ-dependent fault tolerant controller for the glob...

This work presents an adaptive approach for fault tolerant control of singularly perturbed systems, where both actuator and sensor faults are examined in presence of external disturbances. For sensor faults, an adaptive controller is designed based on an output-feedback control scheme. The feedback controller gain is determined in order to stabiliz...

This paper deals with the diagnosis of discrete-time singularly perturbed systems presenting two time scales property. Parity space method is considered to generate the fault detection residual. The focus is in two directions. First, we discuss the residual illconditioning caused by the singular perturbation parameter. Then, the use of the slow sub...

In this paper, an adaptive fault-tolerant control scheme is extended to large-scale interconnected systems with actuator failures and external disturbances. Based on Lyapunov stability theory, a state feedback decentralized controller is designed to compensate for the fault and the disturbance effects, using the overlapping decomposition method. Ap...

This paper presents a class of centralized and decentralized adaptive fault tolerant control (FTC) for N-interconnected subsystems which can make up a global system coupling. An integrated model for the combined dynamics of two interconnected subsystems is developed which provides an ideal frame work for the design of centralized and distributed FT...

paper proposes the extension of generalized internal model control (GIMC) based diagnosis and fault tolerant control to singularly perturbed system. This control method consists of two parts: a controller which guaranties nominal performance and works in the fault free case and a robustness controller to compensate the fault when a sensor failure i...

The additive fault tolerant control (FTC) for delayed system is studied in this work. To design the additive control, two steps are necessary; the first one is the estimation of the sensor fault amplitude using a Luenberger observer with delay, and the second one consists to generate the additive fault tolerant control law and to add it to the nomi...

In this work, we focus on monitoring and reconfiguration of an Adaptive Model Reference (MRA) Fault-Tolerant Control (FTC) for large-scale system. This particular class presents an interconnected and networked control system (INCS). Moreover, the system can be decomposed into N-interconnected subsystems communicating with network. Then the global o...

In this present article a centralized structure of an adaptive method to solve the problem of robust and fault tolerant control (FTC) for large-scale system linear, continuous and time invariant (LTI), against defects sensors and external disturbances is proposed. This class of system contain N-interconnected subsystems. In fact, it operates one ar...

This work aims at the adaptive fault tolerant control using output feedback. Fault tolerant adaptive control is developed for N-interconnected subsystems with unknown sensors failures. Such sensors failures are characterized by some unknown inputs stuck at some unknown fixed values at unknown time instants. An effective output feedback controller s...

The composite state feedback control designed for singularly perturbed system SPS with small time-delay by using Lambert-W function is proposed in this paper. Based on the delayed slow subsystem (SS) and fast subsystems (FS) decomposition, we design a composite sate-feedback control. So the gain of delayed SS will be designed by using Lambert-W fun...

This paper studies the reliable H∞ control for linear time-invariant multiparameter singularly perturbed systems against sensor failures. By time-scale decomposition, the full-order system is decomposed into slow and fast subsystems. After designing a reliable H∞ controller for the global system, three reduced reliable H∞ sub-controllers based on t...

This work aims at the fault diagnosis of two-timescale, singularly perturbed systems (SPSs) and SPSs with a multimodelling structure. The approach of model-based fault detection and isolation using the dynamic parity space to generate singular perturbation parameter free residuals was used. A comparative study of diagnosis of the SPS is carried out...

This paper studies the reliable H_∞ control for linear time-invariant singularly perturbed systems against sensor failures. By time-scale decomposition, the full-order system is decomposed into slow and fast subsystems. After designing a reliable H_∞ controller for the global system, two reduced reliable H_∞ sub-contro...

The paper outlines sensor fault-detection and isolation of singularly perturbed systems (SPS) using the slow subsystem. In deterministic case, the fast subsystem is considered as a modeling error by the approximation of the SPS with the slow subsystem. A second approach was to design a set of observer-based residuals using the slow subsystem. In st...

The aim of this paper is to detect and to isolate sensor faults in singularly perturbed systems (SPS), with emphasis on the use of slow subsystem. Firstly, we considered the fast subsystem as a modelling error by the approximation of the SPS with the slow subsystem. Structured residuals were generated, using robust parity space, to the fault diagno...