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This paper describes new method of fault diagnosis in analog electronic circuits (AEC). Fault diagnosis in analog electronic circuits is in general tested along with one dimension: the generator frequency. In this paper, we present a novel approach that uses more than one dimension to test AEC (those new dimensions are: the load resistance & reactance, generator resistance & reactance). Proposed...
This paper describes how increasing number of dimension of search space (in analog circuit diagnosis) can influence on identification of states of circuit under test (CUT). The criterion of optimization is the maximum number of identified states of CUT. In order to achieve this goal, first each state S and ambiguity set AS must be find and then optimized using Particle Swarm Optimization (PSO) algorithm...
The method presented in this paper uses evolutionary computations to analog circuit testing stimulus shape optimization. The proposed testing excitation is a PWL waveform that generates responses of the tested circuit with appropriate relationship between current values of its specifications and the value of the observed parameter. The energy of error signal between nominal and actually obtained responses...
The testing and diagnosis catastrophic faults technique for analog high frequency (HF) circuits (passive filters and impedance matching circuits) is described in this paper. The novel method based on load and frequency as testing pair has been proposed. The impact of load on testing and diagnostic has been investigated. The best pairs of load and frequency have been chosen. The proposed approach of...
This paper discusses the optimization of input source frequencies to obtain the highest detection and location rate of a circuit under test. The minimum number of frequencies for distinguishes between fault and fault free elements are desired. We briefly describe the basic concepts of simulated annealing method and fuzzy evaluation (fitness) system. Presented application shows how to code the optimization...
The evolutionary technique of test frequencies selection for analog sinusoidal stimuli set is described in this paper. The proposed method bases on ambiguity set concept and evolutionary algorithm that has been executed for fuzzy and weighted fitness functions. The proposed approach to analog testing allows to achieve high efficiency for practical circuits under test with tolerance dispersions and...
This paper discusses the basic concept of analog functional test approach. Recently, most on going research has been focused on distinguishing faulty or healthy circuit - from the manufacturer's point of view, this is more important than locating particular faulty element. The article shows the concept of fuzzy theory approach to functional test creation. To find and locate faulty circuit (system)...
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