With wide-spread application of power electronic converters in high power systems, there has been a growing interest in system reliability analysis and fault-tolerant capabilities. This paper presents a comprehensive review of conventional fault-tolerant techniques regarding power electronic converters in case of power semiconductor device failures. These techniques can be classified into four ...

—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...

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...

Although fault tolerant systems are badly needed, their development is not a trivial task. Considering fault tolerant distributed systems, this difficulty is even bigger, and any artifact that could make this task easier becomes highly valuable. In this paper, we propose and model a distributed consensus service and a f ault detection service, namely, DisCusS and FuSe, that can be used as build...

As building trustworthy (dependable) systems is one of the major challenges faced by software developers, dealing with various threats (such as errors, faults and failures) is becoming one of the main foci of software and system research and development. In the core of ensuring system dependability is acceptance of the fact that errors always happen in spite of all the efforts to eliminate faul...

Two fault-tolerant software techniques are investigated: recovery block and N-version programming. For each, the stable reliability model is transformed into a model that considers reliability growth via the transformation approach based on the hyperexponential model. Analytic and numeric processing of the transformed models identify the influence of fault removal on the reliability of the faul...

This paper discusses the fault tolerant control problem for discrete event systems modeled by Petri nets. The fault is represented by the unobservable transitions. Firstly, an observer-based fault diagnosis method is proposed to estimate the marking with unknown initial markings and meanwhile, to diagnose the faulty behavior. Then, an adaptive fault tolerant controller is designed to maintain t...

Reliability enhancement in software system is a crucial and challenging issue. Applying efficient fault-tolerant mechanism can fulfill the system reliability requirement. This paper proposes reliability models for hierarchical and hybrid fault-tolerant software systems considering failure dependencies or related faults in software components/versions. Our system models are based on the classica...

The very large infrastructure and the increasing demand of services of cloud computing systems lead to the need of an effective fault tolerant allocation technique. In this paper, we address the problem of allocating user applications to the virtual machines of cloud computing systems so that failures can be avoided in the presence of faults. We employ job replication as an effective mechanism ...