Distributed real-time systems have continually being developed for many real applications. It is very important to assure the reliability of such systems. However, developing a fault-free distributed real-time system is very difficult. Duplication is one of the fault-tolerant technologies for improving the reliability of distributed real-time computer systems. In this paper, we present a dual-c...

Both the scale and the reach of computer systems and embedded devices have been constantly increasing over the last decade. As such computer systems become pervasive, our reliance on such systems increases, resulting in our expectation for such systems to continuously deliver services, even in the presence of faults, that is we expect the computer systems to be dependable. One way to ensure the...

This paper proposes a new dynamic and algorithm-based approach to achieve fault tolerance using 3D cellular genetic algorithms (Dynamic Fault-Tolerant 3D-cGA). The proposed algorithm is an improved version of our previous algorithm (Fault-Tolerant 3D-cGA) that introduces and utilizes a dynamic adaptation feature to achieve further improvement. In Dynamic Fault-Tolerant 3D-cGA, faulty individual...

An arbitrarily reliable quantum computer can be efficiently constructed from noisy components using a recursive simulation procedure, provided that those components fail with probability less than the fault-tolerance threshold. Recent estimates of the threshold are near some experimentally achieved gate fidelities. However, the landscape of threshold estimates includes pseudothresholds, thresho...

The main contribution of this paper is the development of fault tolerant control for a wind energy conversion system (WECS) based on the stochastic piecewise affine (PWA) model. In this paper the normal and fault stochastic PWA models for WECS including multiple working points at different wind speeds are established. A reliable piecewise linear quadratic regulator state feedback is designed fo...

The Extra Stage Cube (ESC), a single-fault tolerant interconnection network, has been proposed for use in large-scale parallel and distributed computer systems. This paper shows how ESC fault tolerance can be improved by adopting a new reconfiguration policy. The new scheme requires only a small increase system hardware complexity; no logic need be added to the network. Also, a way to eliminate...

The design and evaluation of highly reliable computer systems is a complex issue. Designers mostly develop such systems based on prior knowledge and experience and occasionally from analytical evaluations of simplified designs. This paper presents a simulation-based environment called DEPEND which is especially geared for the design and evaluation of fault-tolerant architectures. DEPEND is uniq...

—Advances in embedded system technology have enabled automotive manufacturers to design electronic systems that introduce new features to the vehicles, improve their performance and increase safety. Following the successful use of fly-by-wire systems in aircraft, the introduction of drive-by-wire is expected in an increasing number of new vehicles. The electronic components used in these system...

In this paper the problem of Fault Tolerant Control (FTC) in the framework of Discrete Event Systems (DES) modeled as automata is considered. The approach we follow is the so-called active approach in which the supervisor actively reacts to the detection of a malfunctioning component in order to eventually meet degraded control specifications. Starting from an appropriate model of the system, w...

Detectors are system components that identify whether the system is in a particular state. Detectors can be used to ensure arbitrary safety properties for systems, that is, they can be used to prevent the system from reaching a ‘bad’ state. Detectors have found application in the area of fault-tolerant systems but can also be used in the area of security. We present here a theory of detectors t...