Soft-Fault Diagnosis of Analog Circuit with Tolerance Using FNLP
Wei Zhang, Longfu Zhou, Yibing Shi, Huang ChengTi, Yanjun Li · Metrology and Measurement Systems · 2010
A new soft-fault diagnosis approach for analog circuits with parameter tolerance is proposed in this paper. The approach uses the fuzzy nonlinear programming (FNLP) c oncept to diagnose an analog circuit under test quantitatively. Node-voltage incremental equations, as constraints of FNLP equation, are built based on the sensitivity analysis. Through evaluating the parameters deviations from the s olution of the FNLP equation, it enables us to state whether the actual parameters are within tolerance ranges or some components are faulty. Examples illustrate the proposed approach and show its effectiveness.