fault analysis

fault analysis

[′fȯlt ə‚nal·ə·səs]
(engineering)
The detection and diagnosis of malfunctions in technical systems, in particular, by means of a scheme in which one or more computers monitor the technical equipment to signal any malfunction and designate the components responsible for it.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

Fault analysis

The detection and diagnosis of malfunctions in technical systems. Such systems include production equipment, transportation vehicles, and household appliances. While the need to detect and diagnose malfunctions is as old as the construction of such systems, advanced fault detection has been made possible only by the proliferation of the computer. Fault detection and diagnosis actually means a scheme in which a computer monitors the technical equipment to signal any malfunction and determine the components responsible for it. The detection and diagnosis of the fault may be followed by automatic actions enabling the fault to be corrected, such that the system may operate successfully even under the particular faulty condition.

Fault detection and diagnosis applies to both the basic technical equipment and the actuators and sensors attached to it. Actuator and sensor fault detection is very important because these devices are quite prone to faults.

The on‐line or real‐time detection and diagnosis of faults means that the equipment is constantly monitored during its regular operation by a permanently connected computer, and any discrepancy is signaled almost immediately. On-line monitoring is very important for early detection of any component malfunction, before it can lead to more substantial equipment failure. In contrast, off-line diagnosis involves the monitoring of the system by a special, temporarily attached device, under special conditions (for example, car diagnostics at a service station).

The diagnostic activity may be broken down into several logical stages. Fault detection is the indication of something going wrong in the system. Fault isolation is the determination of the fault location (the component which malfunctions), while fault identification is the estimation of its size.

Fault detection and isolation can never be performed with absolute certainty, because of circumstances such as noise, disturbances, and model errors. There is always a trade-off between false alarms and missed detections, the proper balance depending on the particular application.

McGraw-Hill Concise Encyclopedia of Engineering. © 2002 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
I have also long advocated that, for best fault analysis, look for differences between equivalent joints.
Furthermore, express assumption of the risk is a defense in a comparative fault analysis, but that means that a defendant will have to litigate the whole case, since it's difficult to get a summary judgment in negligence.
To reduce human intervention and avoid human fault analysis, the system leverages the inherent capabilities of AssetWise Asset Reliability to automate several processes including:
Palacios, "Stator fault analysis of three-phase induction motors using information measures and artificial neural networks", Electric Power Systems Research, vol.
As an active side channel attack technique, fault analysis can exploit easily accessible information like input-output behavior under malfunctions, magnify and estimate the leaked information by means of mathematical cryptanalysis [16-18].
'Fault analysis is ongoing, and in the interest of accuracy and transparency, DOTr has directed MRT 3 management to release to the public their technical findings at the soonest possible time,' it said.
MANILA, Philippines The Department of Transportation expressed its "sincere apologies" to the passengers who had to get off a train coach of the MRT-3 due to smoke emission.In a statement Saturday, the agency said that fault analysis is ongoing but it has yet to determine the cause of the incident.
Fault analysis and location functionality in PQView is enabled via its FaultPoint[R] Add-In Module.
Differential Fault Analysis (DFA) [16] was one of the earliest techniques invented to attackblock ciphers by provoking a computational error.
The course syllabus for ISO 18436-2:2014 Vibration Analyst training involves the study of the principles of vibration, data acquisition, signal processing, condition monitoring, fault analysis, corrective action, equipment knowledge, acceptance testing, equipment testing & diagnostics, reference standards, reporting & documentation, fault severity determination, rotor/bearing dynamics, and a training examination.