Spelling suggestions: "subject:"fault tolerant"" "subject:"vault tolerant""
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A fault tolerant architecture for nuclear power plant control systemsAntonini, Claudio Daniel January 1982 (has links)
Thesis (Nucl. E.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1982. / MICROFICHE COPY AVAILABLE IN ARCHIVES AND SCIENCE. / Includes bibliographies and index. / by Claudio Daniel Antonini. / Nucl.E.
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Conditional stuck-at fault model for PLA test generationCornelia, Olivian E. January 1987 (has links)
No description available.
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A cluster-proof approach to yield enhancement of large area binary tree architectures /Howells, Michael C. January 1987 (has links)
No description available.
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A unified theory of system-level diagnosis and its application to regular interconnected structures /Somani, Arun K. (Arun Kumar) January 1985 (has links)
No description available.
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Reliability Improvements in Dual Traction Inverters for Hybrid Electric VehiclesYe, Haizhong 19 November 2014 (has links)
In this thesis, several design methodologies are presented to improve the reliability of dual traction inverters in hybrid electric vehicles (HEVs).
Several power inverter topologies including the two-level voltage-source inverter, the boost voltage-source inverter, the Z-source inverter, and reduced-parts inverters are compared in terms of power ratings, volume, and efficiency. The comparison results show that the two-level voltage-source inverter presents higher efficiency, higher power density, and lower cost. Therefore, the back-to-back two-level voltage-source inverter is selected.
DC-link capacitor and power modules are the most vulnerable components in dual traction inverters. The lifetime of capacitor is mainly determined by the core temperature. In this thesis, an interleaving control scheme is proposed to reduce the capacitor power loss by decreasing the total DC-link current harmonics. With reduced capacitor power loss, the core temperature of capacitor is reduced. Therefore, the lifetime of capacitor is improved. In addition, a fast electro-thermal model of traction inverters is proposed to estimate the junction temperatures of power devices. Practical switching losses are measured and thermal coupling effects between multiple devices are considered. The calculation rate of junction temperature is reduced by considering both power loss profiles and properties of the thermal impedance. With this model, over-temperature protection and lifetime evaluation can be implemented to enhance the reliability of traction inverters.
Finally, a current sensor fault-tolerant operation scheme with six-phase current reconstruction technique is proposed to improve the reliability of dual inverters. In order to get the missing phase currents, the PWM signals are phase shifted to create the reconstruction conditions. With measured DC-link current, all phase-currents of dual inverters are obtained at the expense of slight degradation of maximum allowable modulation index. Therefore, when some or all of the phase current sensors are failed, the dual traction inverters can operate normally. / Thesis / Doctor of Philosophy (PhD)
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Fault-Tolerant Control and Fault-Diagnosis Design for Over-Actuated Systems with Applications to Electric Ground VehiclesWang, Rongrong 13 November 2013 (has links)
No description available.
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Deontic Action Logics for Specification and Analysis of Fault-ToleranceCastro, Pablo F. January 2009 (has links)
<p> In this thesis we develop a mathematical framework to express and reason about properties of fault-tolerant computing systems. The main idea behind this mathematical framework is to use axiomatic theories to specify systems. The standard logical operators allow us to describe the basic behavior of the system, while we use deontic predicates on actions to express prescriptions about the system's behavior. Deontic logics have proved to be useful for reasoning about legal and moral systems, where the situation is more or less similar to fault-tolerance: there exists a set of rules that states what the normal behaviours or scenarios are. Violations arise when these rules are not followed and, as a consequence, some actions must be performed to return to a normal or desirable state. We develop our own deontic logic, keeping in mind that we want to use it for specifying fault-tolerant systems. We investigate the properties of this logic, commenting on those that are relevant to the use of the logic in practice. We provide two different deductive systems; one of them is a standard (Hilbert style) deductive system, while the other one is a tableaux system, which can be applied automatically to prove properties of specifications.</p> <p> In any specification language, it is important to have at hand mechanisms which enable designers to modularize the system description; we investigate how to apply these mechanisms to the logics proposed in this thesis, and, in particular, we focus on how the modularization of specifications affects the local prescriptions of a module (or component). We study the problems that arise from the interaction between components. We show that, in some cases, we can guarantee that the locality of violations in a particular component is preserved. Some examples are provided throughout this thesis to illustrate how the ideas described below can be applied in practice. </p> / Thesis / Doctor of Philosophy (PhD)
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Gateway Placement And Fault Tolerance In QoS Aware Wireless Mesh NetworksDrabu, Yasir 29 November 2010 (has links)
No description available.
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Design of a fault-tolerant distributed operating system based on nested atomic actions/Lian, Richard Chiho January 1984 (has links)
No description available.
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A reconfigurable fault-tolerant multiprocessor system for real-time control /Kao, Ming-lai January 1986 (has links)
No description available.
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