Fault Diagnosis of Analog Circuit Using Multi-Objective Linear Programming and Fuzzy

A new single soft-fault diagnosis approach for analog circuit with parameter tolerance is proposed in this paper. The approach uses multi-objective linear programming (MLP) concept and fuzzy function together to diagnose the circuit under test. Node-voltage incremental equations, as constraints of MLP equation, are built based on the sensitivity analysis. Though evaluating the parameters deviations from the solution of the MLP equation and determining the deviation range using fuzzy function, it enable us to locate faulty components. Example illustrates the proposed approach and shows its effectiveness.