Title :
A technique for analog fault diagnosis using element modulation
Author :
Walker, Alvernon ; Lala, Parag K. ; Alexander, Winser E.
Author_Institution :
Dept. of ECE, North Carolina State Univ., Raleigh, NC, USA
Abstract :
The authors describe a novel branch fault-diagnosis technique which requires a single excitation source at one test frequency for solving branch-diagnosis equations. Linearly independent branch-diagnosis equations are constructed by modulating selected network elements. A network element whose value can be varied in a controlled fashion is defined as a modulated element. It is assumed for simplicity that all modulated devices in the network under test have two states (a state is a predefined element value). A subset of the network elements is modulated. Necessary and sufficient conditions for the diagnosis of at least q+1 branch elements at faulty circuit nodes have been derived for a general network where q network elements are modulated. An approximate upper bound on this system of equations is also derived. As an example, the proposed technique is applied to a resistive circuit
Keywords :
fault location; modulation; network analysis; analog fault diagnosis; approximate upper bound; branch fault-diagnosis; branch-diagnosis equations; element modulation; excitation source; faulty circuit nodes; modulated devices; network elements; network under test; resistive circuit; test frequency; Circuit faults; Circuit simulation; Circuit testing; Circuit topology; Equations; Fault diagnosis; Fault location; Impedance; Upper bound; Voltage;
Conference_Titel :
Signals, Systems and Computers, 1991. 1991 Conference Record of the Twenty-Fifth Asilomar Conference on
Conference_Location :
Pacific Grove, CA
Print_ISBN :
0-8186-2470-1
DOI :
10.1109/ACSSC.1991.186649