Multi-fault Diagnosis in Dynamic Systems
نویسندگان
چکیده
In this paper, we address the problem of diagnosing multiple faults in dynamically changing systems. Currently used popular techniques such as codebook and active probing suffer from limitations imposed by their ”static”, non-temporal nature, and single-fault assumptions. We propose a very simple, linear-time multifault scheme, capable of tracking system changes and diagnosing multiple faults much more accurately than previously used approaches. We provide empirical results demonstrating the advantages of our approach and analyze the effect of test set quality on the diagnostic accuracy.
منابع مشابه
Model-based Approach for Multi-sensor Fault Identification in Power Plant Gas Turbines
In this paper, the multi-sensor fault diagnosis in the exhaust temperature sensors of a V94.2 heavy duty gas turbine is presented. A Laguerre network-based fuzzy modeling approach is presented to predict the output temperature of the gas turbine for sensor fault diagnosis. Due to the nonlinear dynamics of the gas turbine, in these models the Laguerre filter parts are related to the linear d...
متن کاملFault diagnosis in a distillation column using a support vector machine based classifier
Fault diagnosis has always been an essential aspect of control system design. This is necessary due to the growing demand for increased performance and safety of industrial systems is discussed. Support vector machine classifier is a new technique based on statistical learning theory and is designed to reduce structural bias. Support vector machine classification in many applications in v...
متن کاملOptimal Current Meter Placement for Accurate Fault Location Purpose using Dynamic Time Warping
This paper presents a fault location technique for transmission lines with minimum current measurement. This algorithm investigates proper current ratios for fault location problem based on thevenin theory in faulty power networks and calculation of short circuit currents in each branch. These current ratios are extracted regarding lowest sensitivity on thevenin impedance variations of the netw...
متن کاملAn Intensity Measure for Seismic Input Energy Demand of Multi-Degree-of-Freedom Systems
Nonlinear dynamic analyses are performed to compute the maximum relative input energy per unit mass for 21 multi-degree-of-freedom systems (MDOF) with preselected target fundamental periods of vibration ranging from 0.2 to 4.0 s and 6 target inter-story ductility demands of 1, 2, 3, 4, 6, 8 subjected to 40 the earthquake ground motions. The efficiency of the several intensity measures as an ind...
متن کاملA qualitative event-based approach to multiple fault diagnosis in continuous systems using structural model decomposition
Multiple fault diagnosis is a difficult problem for dynamic systems, and, as a result, most multiple fault diagnosis approaches are restricted to static systems, and most dynamic system diagnosis approaches make the single fault assumption. Within the framework of consistency-based diagnosis, the challenge is to generate conflicts from dynamic signals. For multiple faults, this becomes difficul...
متن کاملEccentricity Fault Diagnosis Studying for a Round Rotor Synchronous Machine
The paper presents a mathematical base modeling combined to Modified-Winding -Function-Approach (MWFA) for eccentricity fault detection of a round-rotor synchronous machine. For this aim, a 6-pole machine is considered, and the machine inductances are computed by MWFA in healthy and also under eccentricity fault. A numerical discrete-time method has been proposed to machine modeling in voltage-...
متن کامل