In this paper, an on-line fault tolerant approach for networked control systems is proposed. The fault tolerant approach incorporates a fault detection and diagnosis methodology based on on-line identification of an ARX model and on neural nonlinear principal components analysis, as well as on neural nonlinear discriminant analysis. When a fault is correctly diagnosed the supervision system rec...

With the ever increase of complexity and expense of industrial systems, there is less tolerance for performance degradation, productivity decrease and safety hazards, which greatly stimulates to detect and identify any kinds of potential abnormalities and faults as early as possible, and implement realtime fault-tolerant operation for minimizing performance degradation and avoiding dangerous si...

This technical report considers the problem of developing dependable component-based software systems through an architectural approach, which combines fault prevention, fault removal, and fault tolerance techniques. The architecture-centred solution comprises a rigorous approach, which systematises the verification and validation of fault tolerant systems. Using B-Method and CSP, we analyse th...

In this paper, the problem of sensor fault and delay tolerant control problem for a class of networked control systems under external disturbances is investigated. More precisely, the dynamic characteristics of the external disturbance and sensor fault are described as the output of exogenous systems first. The original sensor fault and delay tolerant control problem is reformulated as an equiv...

AUTOMATIC SYNTHESIS OF FAULT-TOLERANCE By Ali Ebnenasir Fault-tolerance is an important property of today’s software systems as we rely on computers in our daily affairs (e.g., medical equipments, transportation systems, etc). Since it is difficult (if not impossible) to anticipate all classes of faults that perturb a program while designing that program, it is desirable to incrementally add fa...

Many fault tolerance techniques that have been devised, applied and improved over the past three decades represent general solutions to recurring problems in the design of fault tolerant computer systems. This document presents some of the best known such techniques, formatted as patterns and organized by a classification scheme into a system of patterns for fault tolerance. This pattern system...

In this paper we compare the relative performance of two fault tolerant mechanisms dealing with repairable and non-repairable components that have failed. The relative improvement in the reliability and safety of a system with repairable components is calculated with respect to the corresponding system where the components are not repairable. The fault tolerant systems under study correspond to...

In this paper, we deal with two important issues in relation to modular reconfigurable manipulators, namely, the determination of the modular assembly configuration optimally suited to perform a specific task and the synthesis of fault tolerant systems. We present a numerical approach yielding an assembly configuration that satisfies four kinematic task requirements: reachability, joint limits,...

In engineering application the sensor or actuator fault will lead to seriously damage to mechanical systems. The research of sensor or actuator fault diagnosis and fault-tolerant control is very important to improve the safety and reliability of the system. The paper investigates the fault diagnosis and fault-tolerant methods of vehicle suspension system with Magnetorheological (MR) dampers (ac...