Combination of multiple reasoning modes in an intelligent fault isolation system

1991 ◽  
Author(s):  
GEORGE VAMOS ◽  
CHARLENE KOWALSKI
Keyword(s):  
Fault Isolation ◽  
Isolation System

New Voters for Redundant Systems

1975 ◽  
Vol 97 (1) ◽  
pp. 41-45 ◽  
Author(s):  
R. B. Broen
Keyword(s):  
Smooth Function ◽  
Output Signal ◽  
Weighted Average ◽  
Direct Calculation ◽  
Fault Isolation ◽  
Function Approach ◽  
Redundant System ◽  
Isolation System ◽  
Input Signals ◽  
Redundant Systems

This paper describes a class of redundant voters which compute and provide a “correct” output signal given a set of redundant input signals. The output is determined as a continuous smooth function of the redundant inputs using a weighted “average.” This type of voter tends to minimize switching transients since the isolation of faulty signals is achieved through a continuous numerical weighting. Equalization schemes which are normally required in voter designs to inhibit adverse transients during a channel failure are negated by this method. This function approach to designing a voter and fault isolation system provides for direct calculation of the characteristics of the output signal, given known characteristics of the inputs. Using this proposed method, a voter can be designed to provide a weighted average of the remaining good signals of a redundant system in the presence of one or more failed signal channels. Computed examples of voter output for assumed values of voter input signals are given for one representative candidate voter when used in configurations for both triply redundant and quadruply redundant systems.

FIS: an AI-based fault isolation system

2002 ◽  
Author(s):  
K. DeJong ◽  
F. Pipitone ◽  
W. Spears
Keyword(s):  
Fault Isolation ◽  
Isolation System

scholarly journals Application of a Fault Detection and Isolation System on a Rotary Machine

2013 ◽  
Vol 2013 ◽  
pp. 1-11 ◽  
Author(s):  
Silvia M. Zanoli ◽  
Giacomo Astolfi
Keyword(s):  
Fault Detection ◽  
Centrifugal Compressor ◽  
Principal Component ◽  
Fault Isolation ◽  
Fault Detection And Isolation ◽  
Isolation System ◽  
Multiple Faults ◽  
Rotary Machine ◽  
Model Free ◽  
Refinery Plant

The paper illustrates the design and the implementation of a Fault Detection and Isolation (FDI) system to a rotary machine like a multishaft centrifugal compressor. A model-free approach, that is, the Principal Component Analysis (PCA), has been employed to solve the fault detection issue. For the fault isolation purpose structured residuals have been adopted while an adaptive threshold has been designed in order to detect and to isolate the faults. To prove the goodness of the proposed FDI system, historical data of a nitrogen centrifugal compressor employed in a refinery plant are considered. Tests results show that detection and isolation of single as well as multiple faults are successfully achieved.

Performance Analysis of a Fault Isolation System for Fault-Tolerant Voltage-Fed PWM Motor Drives

2021 ◽  
Author(s):  
Luigi Danilo Tornello ◽  
Giacomo Scelba ◽  
Andrea Spampinato ◽  
Gianluigi Forte
Keyword(s):  
Performance Analysis ◽  
Fault Tolerant ◽  
Motor Drives ◽  
Fault Isolation ◽  
Isolation System

Signal Trace and Power Plane Shorts Fault Isolation Using TDR

2001 ◽  
Author(s):  
Dima Smolyansky ◽  
Phoumra Tan ◽  
Donald Staab
Keyword(s):  
Time Domain Reflectometry ◽  
Fault Isolation ◽  
Isolation System ◽  
Fault Locating ◽  
Test Board ◽  
Impedance Profile ◽  
The Difference ◽  
The Time Domain ◽  
Secondary Information ◽  
Failure Location

Abstract The focus of this article is on locating signal-to-ground shorts and plane-to-plane shorts using the time domain reflectometry (TDR) based fault isolation system. The article proposes two comparative techniques for plane-to-plane short location, both based on the secondary information in the TDR data. The first technique looks for the difference in secondary reflections in the TDR waveform and the second looks at the inductance of the current return path, which can be computed in IConnect TDR software. The article presents simple test board example for plane-to-plane short failure location and discusses the results obtained by applying the TDR technique to the measurements of a sample package under test. Locating a signal-to-ground short has been shown to present little difficulty over a comparable open fault locating task. However, with the true impedance profile and planar inductance analyses, the claim of impossibility of locating a plane-to-plane is effectively challenged in this paper.

Sign in / Sign up

Export Citation Format

Share Document