Results 251 to 260 of about 248,739 (301)

Fault signal filtering for improving fault section estimation

2000 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.00CH37077), 2002
Fault diagnostic processes obtain data from circuit-breaker relay status and SCADA messages. To speed up fault diagnosis processes, a scheme of fault signal filtering (FSF) is proposed for the rapid estimation of fault regions, prior to further pinpointing of the fault. By considering circuit-breaker relay status, boundary regions are formed by joining
C.S. Chang, S.G. Kerk
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Estimation of Fault Resistance Using Fault Record Data

IEEE Transactions on Power Delivery, 2015
Information about typical fault resistances of transmission lines will help improve the settings of distance relays. This paper proposes an offline method for estimating the fault resistance of transmission lines using the COMTRADE fault files available from digital distance relays. The proposed method uses the fault records at both ends of a line, but
Bing Xia, Yang Wang, Ernesto Vazquez, Wilsun Xu, Daniel Wong, Michael Tong   +5 more
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Active Fault Tolerant Control Based on Fault Estimation

Applied Mechanics and Materials, 2014
For the chattering problem in the traditional sliding mode observer-based fault estimation, a second order sliding mode observer based on the Super-twisting algorithm was proposed. In order to avoid the cumbersome process of proving the stability of the Super-twisting algorithm, a Lyapunov function was adopted.
Zheng Gao Hu, Guo Rong Zhao, Da Wang Zhou   +2 more
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AP-Based Fault Estimation

2017
In this chapter, our objective is to propose a novel fault estimation observer with AP for continuous-time/discrete-time dynamic systems.
Ke Zhang, Bin Jiang, Peng Shi, Vincent Cocquempot   +3 more
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Robust estimation in fault detection

[1992] Proceedings of the 31st IEEE Conference on Decision and Control, 2005
Modeling errors present a significant and difficult challenge in the design of analytic fault detection mechanisms. The authors discuss the sensitivity to model uncertainty of estimator-based failure detection techniques. In particular, they discuss desired statistical properties for the decision variable, and why these characteristics are difficult to
R. Mangoubi, B. Appleby, J. Farrell
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Actuator faults estimation using sliding mode state estimator

2010 IEEE 8th International Symposium on Applied Machine Intelligence and Informatics (SAMI), 2010
The modified method of the actuator faults estimator design for the continuous-time linear MIMO systems is treated in this paper. Based on the sliding mode state estimator the problem addressed is indicated as the approach giving necessary and sufficient condition for design. Lyapunov inequality implying two linear matrix inequalities from are outlined
Dusan Krokavec, Anna Filasova
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Fault estimation using algebraic observers

2007 American Control Conference, 2007
A model free nonlinear observer based upon algebraic observability condition is used in the fault estimation problem of nonlinear systems. A diagnosis criterion based on the differential transcendence degree of a differential field extension is employed. Two systems with fault presence are analyzed. Faults are estimated with this observer.
Rafael Martinez Guerra, Alberto Luviano-Juarez, Jose Juan Rincon-Pasaye   +2 more
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The estimation of fault coverage

Microelectronics Journal, 1989
Abstract Fault coverage estimation critically depends on the choice of the faults inserted in the fault list. This paper addresses the issues related to automatic fault list generation, pointing out some typical limitations of available CAD tools.
S. Gaviraghi, D. Giacomuzzi, C. Morandi
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Fault magnitude estimation for processes

Chemical Engineering Science, 2011
Abstract In this paper, the fault isolation and fault magnitude estimate methods are proposed. In the original fault isolation methods, contribution plots are popular. However, it is not accurate. In the original fault estimation methods, the authors assume that the fault magnitude is far greater than the normal measurement.
Yingwei Zhang, Yang Zhang, Chang Li
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Comparing Fault-Proneness Estimation Models

10th IEEE International Conference on Engineering of Complex Computer Systems (ICECCS'05), 2005
Over the last, years, software quality has become one of the most important requirements in the development of systems. Fault-proneness estimation could play a key role in quality control of software products. In this area, much effort has been spent in defining metrics and identifying models for system assessment.
BELLINI, PIERFRANCESCO, BRUNO, IVAN, NESI, PAOLO, ROGAI, DAVIDE   +3 more
openaire   +1 more source