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A fault-accommodation technique proposed for inverter drive systems extends the operation of an electrical power drive during an incipient power transistor fault. The discussed technique utilizes diagnostic methods to identify and isolate degraded power transistors. Once isolated, an appropriate fault-accommodating control method using one-transistor trigger suppression control relieves electrical...
In complex systems, there are few critical failure modes. Prognostic models are focused at predicting the evolution of those critical faults, assuming that other subsystems in the same system are performing according to their design specifications. In practice, however, all the subsystems are undergoing deterioration that might accelerate the time evolution of the critical fault mode. This paper aims...
This paper presents a cost-effective test methodology for adaptive equalizers which follow the digitally-assisted analog design style. By observing the states in the digital adaptation engine during or after the adaptation process in response to the test stimulus, the health of the adaptive equalizer can be determined. We propose two different types of signatures, namely static and dynamic signatures,...
A complex system such as an aircraft engine, is composed of several components or subsystems which interact with each other in several ways. These constituent components/subsystems and their interactions make up the whole system. When a fault condition arises in one of the components, not only that component behavior changes but the interaction of that component with the other system constituents...
Automotive systems are becoming increasingly dependent on electrical components, computer control, and sensors. It has become extremely critical to detect faults in the electrical system and predict the remaining useful life of failing components. This paper introduces an integrated methodology for monitoring, modeling, data processing, fault diagnosis, and failure prognosis of critical electrical...
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