Disturbances in the form of oscillations are usually originated in process plants due to various faults such as sensor faults, valve faults, process faults and controller tuning faults. Many of these faults can be represented as nonlinearities. Faults in the form of nonlinearities may produce oscillations with a fundamental frequency and its harmonics. This study presents a novel method based o...

The objective of this study is the investigation of the correlation between object-oriented design metrics and the likelihood of the occurrence of object-oriented faults. Such a relationship, if identified, can be utilized to select effective testing techniques that take the characteristics of the program under test into account. Our empirical study was conducted on three industrial real-time s...

In this paper, software faults are emulated by Software Implemented Fault Injection (SWIFI) to evaluate embedded operating system. The method is based on the fact that the source codes of the operating system are mapped into the code segment in the target memory and it is easy to inject kinds of faults in the memory by SWIFI. Faults are emulated by injecting faults at assembly level instead of ...

A significant issue in fault injection experiments is that the injected faults are representative of software faults observed in the field. Another important issue is the time used, as we want experiments to be conducted without excessive time spent waiting for the consequences of a fault. An approach to accelerate the failure process would be to inject errors instead of faults, but this would ...

rotating machines in particular induction electrical machines are important industry instruments. in manufacturing, electrical motors are exposed to many damages, and this causes stators and rotors not to work correctly. in this paper we addressed modal analysis and an intelligent method to detect motor load condition and also the stator faults such as turn-to-turn and coil-to-coil faults using...

In recent years, a number of high level applications have been reported to be tolerant to errors resulting from a sizeable fraction of all single stuck-at faults in hardware. Production testing of devices targeted towards such applications calls for a test vector set that is tailored to maximize the coverage of faults that lead to functionally malignant errors while minimizing the coverage of f...

Multiple timing faults, although detectable individually, can hide each other’s faulty behavior making the faulty system indistinguishable from a non-faulty one. A set of graph augmentations are introduced for single timing faults. The fault detection capability of the augmentations is analyzed in the presence of multiple timing faults and shown that multiple occurrences of a class of timing fa...

With increasing transient error rates, distinguishing intermittent and transient faults is especially challenging. In addition to particle strikes relatively high transient error rates are observed in architectures for opportunistic computing and in technologies under high variations. This paper presents a method to classify faults into permanent, intermittent and transient faults based on some...

We present a novel approach for model-based FDI of abrupt faults in process components of continuous dynamic systems. Abrupt faults refer to parameter value changes that occur much faster than the nominal process dynamics, and component faults refer to faults that correspond to physical parameters in the bond graph model of a system. These faults cause transients in system behavior. We analyze ...

We investigate two strategies to guarantee temporal correctness of a combinational circuit. We first propose a new technique to identify and test primitive faults. A primitive fault is a path delay fault that has to be tested to guarantee the performance of the circuit. Primitive faults can consist of single(SPDF’s) or multiple-path delay faults (MPDF’s). Testing strategies for single primitive...