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Fault indicator

About: Fault indicator is a research topic. Over the lifetime, 10057 publications have been published within this topic receiving 143482 citations. The topic is also known as: FCI & power line fault indicator.


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Patent
19 Sep 1988
TL;DR: In this article, a hierarchical fault capture circuitry is arranged in a hierarchical manner and provides a group fault output signal when one of the fault indicators generates a fault signal, and a programmable controller is provided which receives the group fault signal as an interrupt and which then responds by transferring registered fault event signals to a dynamic string register, rearming the error detection used to trap a faulty signal and logging the fault location in a memory for later readout by a maintenance processor or the like.
Abstract: Apparatus for detecting and isolating the occurrence of faults in a digital electronic system so as to reduce the mean-time-to-repair. Associated with the logic circuitry to be monitored is a fault indicator which produces a fault signal when a malfunction occurs. Fault capture circuitry is arranged in a hierarchical manner and provides a group fault output signal when one of the fault indicators generates a fault signal. A programmable controller is provided which receives the group fault signal as an interrupt and which then responds by transferring registered fault event signals to a dynamic string register, rearming the error detection used to trap a fault signal and logging the fault location in a memory for later readout by a maintenance processor or the like. The dynamic string allows communications to take place using a scan/set protocol.

50 citations

Patent
21 Nov 2007
TL;DR: In this article, a system and a method for rapidly diagnosing bugs of system software are apply for rapidly localizing a system program fault that causes a system error and then feeding back to a subscriber.
Abstract: A system and a method for rapidly diagnosing bugs of system software are apply for rapidly localizing a system program fault that causes a system error and then feeding back to a subscriber. First, according to the subscriber's requirement, a program of system fault analysis standard is preset and written into the system. Next, a plurality of fault insertion points is added into a program module of the system according to the subscriber's requirement for the precision of the fault analysis result. Then, fault management information is generated at the fault insertion points during the running process of the system program, and the management information is monitored for collecting relevant system fault data. After that, the collected system fault data is analyzed in real time through the program of system fault analysis standard, so as to obtain the minimum fault set for causing the system error.

49 citations

Journal ArticleDOI
TL;DR: A new algorithm named adaptive fault diagnosis algorithm for CAN (AFDCAN) is designed for low-cost resource-constrained distributed embedded systems and proves that the algorithm uses a definite and bounded number of testing rounds and messages to complete one diagnostic cycle.
Abstract: A controller area network (CAN)-based distributed system may develop faults at run-time. These faults need to be detected and diagnosed. This paper proposes a new algorithm named adaptive fault diagnosis algorithm for CAN (AFDCAN). It is designed for low-cost resource-constrained distributed embedded systems. The proposed algorithm detects all faulty nodes on the CAN. It allows new node entry and reentry of repaired faulty nodes during a diagnostic cycle. AFDCAN is found to provide high fault tolerance and to ensure reliable communication. It uses single-channel communication deploying the bus-based standard CAN protocol. A hardware implementation of the proposed algorithm has been used to obtain the results. The results show that the proposed algorithm diagnoses all faults in the system. Analysis of the proposed algorithm proves that the algorithm uses a definite and bounded number of testing rounds and messages to complete one diagnostic cycle.

49 citations

Proceedings ArticleDOI
17 Jun 2001
TL;DR: In this paper, the authors propose a fault-tolerant induction motor drive system, where the fault mode is the case in which a misfiring does occur in one of the power switches and the fault tolerance is obtained by reconfiguration of the inverter topology.
Abstract: This paper proposes the possibility of developing fault diagnosis and remedial operating strategies, which enable a fault tolerant induction motor drive system. The fault mode investigated is the case in which a misfiring does occur in one of the power switches. The fault diagnosis is achieved by using a strategy that permits both identification and isolation of the faulty components. The fault tolerance is obtained by reconfiguration of the inverter topology. This allows for continuous free operation of the drive even with complete loss of one of the legs of the inverter. Experimental results demonstrate the validity of the system proposed.

49 citations

Proceedings ArticleDOI
04 Nov 1998
TL;DR: This paper presents an investigation of both fault and error injection techniques for emulating software faults in an embedded real-time system and results show that the test case had a greater influence than the fault type on the failure symptoms for fault injections.
Abstract: The complex interactions between faults, errors, failures and fault handling mechanisms can be studied via injection experiments. This paper presents an investigation of both fault and error injection techniques for emulating software faults. For evaluation, 1600 software faults and 5400 time-triggered errors were injected into an embedded real-time system. The cost-related results are: (i) the time required to create a fault set for fault injection was about 120 times longer than the time required to create an error set for time-triggered injection, and (ii) the execution time for the time-triggered error injection experiments was four times shorter than for the fault injection experiments. However, the error injection would be only 1.3 times faster if another strategy for fault injection had been used. Furthermore, failure symptom-related results are: (i) the test case had a greater influence than the fault type on the failure symptoms for fault injections, (ii) the error type had a greater influence on the failure symptoms for time-triggered error injections than had the test case, and (iii) the error type had a larger impact on the failure symptoms than the fault type.

49 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202381
2022215
202127
202061
2019116
2018160