An efficient method for making a fault dictionary for short‐circuit fault diagnosis of linear networks
Kazuhiro Sakaguchi, Mineo Kaneko · Electronics and Communications in Japan (Part III Fundamental Electronic Science) · 1992
Abstract In the fault diagnosis for the breakdown fault of the analog circuit such as short‐ or open‐circuit, the fault dictionary usually is employed which describes the input‐output characteristics for the accessible nodes for all assumed faults. In the construction of the fault dictionary, generally a large number of inverse matrix calculations is required, and the computational complexity becomes tremendous with the increase of the circuit scale. Thus, how to construct and maintain the fault dictionary efficiently is important. This paper especially considers the short‐circuit fault in the fault diagnosis of the analog circuit and proposes a method which efficiently constructs the fault dictionary. This method considers the difference of the input‐output characteristics in normal and fault operations, for which the efficient calculation is presented. The method can be characterized as the extension of Johnson's proposal based on Householder's technique. In the diagnosis by dictionary, the fault generally is diagnosed by comparing the items of the fault dictionary and the measured result. By the proposed method, the computational complexity in constructing an item of the dictionary can be reduced to the same order as that of the comparison procedure (except for the preliminary calculations in common to the whole item).