Abstract The keys factor in making wind power one of the main sources to meet world's growing energy demands is reliability improvement turbines (WTs). However, eventuality fault occurrence on WT components cannot be avoided, especially for doubly-fed induction generator (DFIG) based WTs, which are operating severe environments. maintenance need increases due unexpected faults, turn leads highe...

In this paper we present a few fundamental results related to the problems of characterization and detection of intermittent faults in digital circuits, which, up to now, have been almost totally ignored. This problem is important since in many technologies intermittency is a predominant mode of failure. We first discuss various new classes of fault modes. We then introduce a Markov model for a...

Ground faults in photovoltaic (PV) systems pose a fire and shock hazard. To mitigate these risks, AC-isolated, DC grounded PV systems in the United States use Ground Fault Protection Devices (GFPDs), e.g., fuses, to de-energize the PV system when there is a ground fault. Recently the effectiveness of these protection devices has come under question because multiple fires have started when groun...

The distributed computing systems, predominantly computing and computer based systems generally tolerate changes which are not desired, in their internal structure or external environment in regular working which can be referred to as faults. A Fault may be an operational fault or design fault. The techniques to tolerate the fault are used to make a system fault tolerable. Checkpointing is a te...

A technique for the systematic design of fault-tolerant automatic measurement systems was proposed by the authors in a previous paper. It is based on the use of “analytical redundancy” relationships concerning both the measurement system and the monitored devices. In this paper, the technique was applied to the handling of sensors and actuators used for the electronic control of internal combus...

The Common Object Request Broker Architecture (CORBA) is the most successful representative of an object-based distributed computing architecture. Although CORBA simplifies the implementation of complex, distributed systems significantly, the support of techniques for reliable, fault-tolerant software, such as group communication protocols or replication is very limited in the state-of-the-art ...

Recently, an approach for the rapid detection of small oscillation faults based on deterministic learning theory was proposed for continuous-time systems. In this paper, a fault detection scheme is proposed for a class of nonlinear discrete-time systems via deterministic learning. By using a discrete-time extension of deterministic learning algorithm, the general fault functions (i.e., the inte...

While operating a gear with local fault impulse is created, the high-frequency shock vibration is then generated and the vibration amplitude is modulated by the pulse force. Both the envelope and cepstrum analyses are useful tools to identify the fault frequencies and distinguish them from other frequency contents. Since the envelope analysis method provides an important and effective approach ...

Recent observations of an association between forearc basins and slip during subduction thrust earthquakes suggest a link between processes controlling upper plate structure and seismic coupling on the subduction-zone thrust fault. We present a mechanism for the formation of these basins where sedimentation occurs on landward-dipping segments of the subduction wedge, which itself is actively gr...

− A new simple method of single soft fault detection and localization of analog parts in embedded electronic systems controlled by microcontrollers is presented. In the pre-testing stage of the method a fault dictionary is created based on the map of localization curves. In the measurement stage the time response to a stimulating square impulse of the analog part is applied to the input of the ...