Intelligent fault diagnosis benefits from efficient feature selection. Neighborhood rough sets are effective in feature selection. However, determining the neighborhood value accurately remains a challenge. The wrapper feature selection algorithm is designed by combining the kernel method and neighborhood rough sets to self-adaptively select sensitive features. The combination effectively solve...

Fault-tolerance is the survival attribute of the real-time software system. The software should provide correct results in the face of various failures. A major technological concern for the coming years is the ever widening gap between the demand for high quality, robust software and its supply. Software fault tolerance is basically the design faults in the computer system. Its function is to ...

This paper mainly deals with the issue of incipient fault diagnosis for rolling element bearing. Firstly, an envelope demodulation technique based on wavelet packet transform and energy operator is applied to extract the fault feature of vibration signal. Secondly, the relative spectral entropy of envelope spectrum and the gravity frequency are combined to construct two-dimensional features vec...

In this study, automatic detection of stator winding inter-turn short circuit fault (SWISCFs) in surface-mounted permanent magnet synchronous motors (SPMSMs) and automatic classification of fault severity via a pattern recognition system (PRS) are presented. In the case of a stator short circuit fault, performance losses become an important issue for SPMSMs. To detect stator winding short circu...

This paper describes a newly developed fault feature extraction method for bearing prognostics. The effectiveness of the method is demonstrated with real bearing run-to-failure test data. Experimental results show that with the growth of the bearing defective area, the method is able to indicate clearer trends than the traditional condition indicators, such as RMS, the peak value, the amplitude...

Real-time control applications involve the interaction of multiple components. As systems become more complex their reliability tends to decrease, hence, fault tolerance must be incorporated to keep reliability within specified levels. A novel reconfiguration mechanism inspired by mechanisms that take place during the embryonic development of living beings is proposed in this paper. It is illus...

Due to the pseudo-bipolar structure of flexible DC distribution network, short-circuit current caused by a pole-to-ground fault is weak. The characteristics, particularly steady-state are not prominent. Therefore, diagnosis and protection have become more challenging. This paper theoretically studies characteristics in derives analytical expression current, analyzes directional characteristics....

The first aim of the paper is the characterization of fault-originated transients in power distribution networks as a function of the fault location and of the measurement point. Both fault location and of the measurement point are indeed correlated to the position of the faulted branch and of the fault location through the paths covered by travelling waves originated by the fault event. The se...

An accurate fuel injection advance angle is an important parameter to obtain better fuel combustion index and emission index. Fuel injection advance angle is always deranged because of the wear of the injection nozzle matching parts, which has serious impact on diesel engine performance. How to measure the fuel injection advance angle easily and accurately is a problem for fault diagnosis of hi...