This paper describes a new design for a fault tolerant Hbridge dc-dc converter. Open circuit and short circuit fault tolerance is achieved using multilevel converter topology in combination with pulse width modulation control strategy allowing a large set of converter switching states to produce bidirectional power flows at any required output voltage. If two switches fail at particular instant...

Petri nets are useful for modelling a variety of asynchronous and concurrent systems, such as automated manufacturing, computer fault tolerant systems, and communication networks. This study employs an airbag inflator system as an example to demonstrate a Petri net approach to failure analysis. This paper uses Petri nets to study minimum cut sets finding, marking transfer, and dynamic behaviour...

The goal of this project is to study and simulate a distributed real-time fault-tolerance web monitoring system. The method of providing fault-tolerance is to schedule multiple copies of a task on different computer nodes in a distributed computing system. A fault-tolerant system automatically recovers from a specified number of failures. If the primary task cannot be completed due to a fault, ...

This paper discusses a case study where we use relations to represent the requirements of a fault tolerant flight control system. This task is part of a larger research project, carried out on behalf of Dryden Flight Research Center, whose purpose is to investigate the certification of an adaptive flight control system that is fault tolerant with respect to sensor faults. We find that relations...

Abstract: Error detectable and error correctable coding in Hamming space was researched to discover possible fault tolerant coding constellations, which can implement Boolean logic with fault tolerant property. Basic logic operators of the Boolean algebra were developed to apply fault tolerant coding in the logic circuits. It was shown that application of three-bit fault tolerant codes have pro...

The central topic of this book is application-level fault-tolerance, that is the methods, architectures, and tools that allow to express a fault-tolerant system in the application software of our computers. Application-level fault-tolerance is a sub-class of software fault-tolerance that focuses on the problems of expressing the problems and solutions of fault-tolerance in the top layer of the ...

A major problem in transitioning fault tolerance practices to the practitioner community is a lack of a common view of what fault tolerance is, and how it can help in the design of reliable computer systems. This document takes a step towards making fault tolerance more understandable by proposing a conceptual framework. The framework provides a consistent vocabulary for fault tolerance concept...

The need for fault tolerant software has grown signiicantly with the need for providing computer-based continuous service in a variety of areas that include telecommunications , air and ground transportation, and defense. TAMER (a Testing, Analysis, and Measurement Environment for Robustness) is a tool designed to assess the dependability of such systems. Three key ideas make TAMER diierent fro...