Test pattern generation and diagnosis algorithms that target realistic bridging faults must be provided with a realistic fault list. In this work we describe FedEx, a bridging fault extractor that extracts a circuit from the mask layout, identifies the two-node bridges that can occur, their locations, layers, and relative probability of occurrence. Our experimental results show that FedEx is me...

Nowadays, inverters are power electronics devices used in the renewable energy conversion systems and also to fed induction motors, therefore the continuity of service of power converter has been a major concern. This paper presents a new approach of open circuit fault detection in a pulse width modulation three phase voltage source inverter. The fault occurrence detection was based on the stan...

Process allocation is important for fault-tolerant multi-computer systems since it directly aaects the performance and dependability of the system. In this paper, we consider load-balancing process allocation for fault-tolerant systems that balances the load before as well as after faults start to degrade the performance of the system. We show two schemes to tolerate multiple faults in the pass...

Automation of power system fault identification using information conveyed by the wavelet analysis of power system transients is proposed. Probabilistic Neural Network (PNN) for detecting the type of fault is used. The work presented in this paper is focused on identification of simple power system faults. Wavelet Transform (WT) of the transient disturbance caused as a result of occurrence of f...

This paper presents fault tolerant control systems FTC in a hybrid system framework. Due to the discrete nature of fault occurrence and reconfiguration, FTC systems are considered hybrid in nature. Thus, in this work, actuator fault recoverability is studied by utilizing a controllability concept of hybrid systems. The hybrid formalism allows the recoverability’s analysis based on the controlla...

Transmission and distribution lines are vital links between generating units and consumers. They are exposed to atmosphere, hence chances of occurrence of fault in transmission line is very high, which has to be immediately taken care of in order to minimize damage caused by it. In this paper discrete wavelet transform of voltage signals at the two ends of the transmission lines have been analy...

In this paper, a new fault identification procedure based on Kernel Principal Component Analysis (KPCA) is proposed. In contrast to the linear PCA, a key disadvantage of the KPCA is that it cannot be used directly for fault identification, e.g. using contribution plots. Therefore, a fault identification strategy based on the power series approximation of the kernel functions is proposed. To dem...

Dissolved gas analysis (DGA) is a reliable technique for detecting the presence of incipient fault conditions in oil immersed transformers. In this method the presence of certain key gases is monitored. The various analysis methods are : Rogers ratio, IEC ratio, Doernenburg, Duval triangle, key gas, artificial neural network (ANN) method. In this paper the various DGA methods are evaluated and ...

1 INTRODUCTION A reliable computer system needs to provide its normal level of service in the presence of hardware and software faults [Avi86, Lap92]. There are two philosophies of achieving this reliability: fault avoidance, wherein techniques prevent the occurrence of faults in the first place, and fault tolerance, wherein techniques allow the system to continue execution despite the occurren...