From this standpoint, a power system fault diagnosis model based on time series similarity matching is proposed herein. First, a set of suspected faulty components can be determined after the occurrence of a fault or a set of faults. Then, on the basis of the specifications of protection ...
A t/s-diagnosable system permits diagnosis of faulty units within a set of s units provided the number of faulty units does not exceed t. A characterization of t/s-diagnosable systems is presented. This characterization is then used to develop an efficient algorithm for diagnosis of t/s-diagn...
Using this model, we present efficient algorithms for failure source identification for single and multiple faults, for diagnosis of faulty alarms, and for forewarning and fault simulation. All these algorithms are analysed for their worst-case complexities. The treatment is algorithmic and graph ...
A probabilistic model-based approach is presented for the design of auxiliary input signals enhancing fault diagnosability by separation of multiple nonlinear models pertaining to nominal and faulty system operations in the presence of the probabilistic uncertainties. To obtain a computationally tractable ...
The definitions of diagnosability are complementary and capture desired objectives regarding the detection and identification of faults, resets, and the current system status (namely, is the fault present or absent). The associated necessary and sufficient conditions are based upon the technique of "...
akaEffect-CauseDiagnosisEffect•Reasoningbasedonobservedbehaviorandexpected(good-circuit)functions•Commonlyusedatsystemandboard-levels•Triestoseparategoodandsuspectareas•Advantage:Simpleandgeneral•Disadvantage:Notveryprecise,oftengivesnoindicationofdefectmechanism ©2005DavidLavo FaultDiagnosisOverview 8 Caus...
2. Literature review Generally speaking, fault diagnosis is supposed to perform three tasks: fault detection, fault isolation and fault identification (FDII) [2]. Fault detection is to make a decision that whether system has a fault. Fault isolation is to determine the location of the fault. ...
Wind energy has become one of the vital energy sources in the world, while wind power generation systems have been widely studied and applied [1]. The planetary gearbox is one of the critical components in the transmission system of wind turbines (WTs) because of its advantages of compact str...
the study of small-sample fault diagnosis methods cannot only realize the accurate identification of equipment health status under limited training data, but also be of great significance in alleviating the difficulty of fault signal acquisition and reducing the investment of human and material resources...
Several researchers have examined the problem of fault detection, isolation, and identification [1], [2], [3]. Marzat et al. [1] have reviewed model-based fault diagnosis approaches for aerospace systems; these approaches include expert systems [4], neural networks [5], support vector ...