Fault Isolation
Fault Isolation - Related Videos
01:18
Fault Types
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2024
When analyzing a single line-to-ground fault from phase A to ground at a three-phase bus, it is important to consider the fault impedance. This impedance is zero for a bolted fault, equal to the arc impedance for an arcing fault, and represents the total fault impedance for a transmission-line insulator flashover. To derive sequence and phase currents, fault conditions are translated from the phase domain to the sequence domain. For line-to-line faults occurring between phases B and C, the...
07:39
The Role of Fabric in Frictional Properties of Phyllosilicate-Rich Tectonic Faults
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Cited by 3 •
2021
Friction of phyllosilicates-rich faults sheared in their in situ geometry is significantly lower than friction of their powdered equivalents.
06:45
Design and Application of a Fault Detection Method Based on Adaptive Filters and Rotational Speed Estimation for an Electro-Hydrostatic Actuator
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2022
In this paper, an adaptive filter based on a normalized least mean square (NLMS) algorithm and a rotational speed estimation method are introduced to detect the electrical and hydraulic faults of the electro-hydrostatic actuator (EHA). The efficacy and feasibility of the aforementioned methods are verified through simulations and experiments.
08:09
Vasodilation of Isolated Vessels and the Isolation of the Extracellular Matrix of Tight-skin Mice
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Cited by 1 •
2017
We describe the isolation of cardiac extracellular matrix from C57Bl/6J control mice, tight-skin mice, and tight-skin mice treated with the IRF5 inhibitory peptide. We also describe the vasodilation studies on the isolated vessels from C57Bl/6J, tight-skin mice and tight-skin mice treated with the IRF5 inhibitory peptide.
07:12
Neutrophil Isolation Protocol
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Cited by 169 •
2008
Neutrophils are among the first cells to arrive on the site of inflammatory immune response, and their functions and mechanisms have been studied extensively in vitro. We demonstrate a standard density gradient separation method to isolate human neutrophils from whole blood using commercially available separation media.
FAQs
The process begins by treating observed symptoms as evidence about where system behavior diverges from expected operation. Engineers compare those observations with the system’s intended function, then select diagnostic checks that distinguish between possible causes. This approach converts a broad failure into a smaller set of plausible locations, making subsequent testing more focused and reducing unnecessary component replacement.
Partitioning divides a complex system into functional sections that can be evaluated separately. If a diagnostic result shows that one section operates as expected, attention can shift to the remaining sections rather than the entire system. Repeating this narrowing process helps locate a connection, component, or condition responsible for the failure while controlling the scope of investigation.
These methods provide different forms of evidence for narrowing suspected causes. Fault trees organize possible failure paths, signal tracing follows behavior through relevant parts of a system, and built-in test data supplies diagnostic information generated by the system itself. Engineers select among them according to the system and operating conditions, using the results to guide further checks.
A typical procedure starts by observing the failure and comparing it with expected operation. Engineers then divide the system into functional sections, perform suitable diagnostic tests, and use each result to eliminate or retain possible fault locations. The investigation continues until the suspected component, connection, or condition is sufficiently narrowed for repair or further evaluation.
The available technique depends on how the system represents normal and abnormal operation. Signal tracing can examine behavior through system sections, continuity checks can evaluate connections, fault trees can structure possible causes, built-in test data can support diagnosis, and controlled substitution can compare system response. These options allow fault isolation to be adapted across electronic, mechanical, software, and integrated systems.
Accurate localization reduces repair time and helps prevent replacing components that are not responsible for a failure. In maintenance, this can make interventions more targeted and support safer work under the relevant operating conditions. Beyond repair, recorded diagnostic findings contribute to reliability analysis and can reveal opportunities for future design improvements in the engineered system.