Nonlinear circuit fault diagnosis with large change sensitivity

Until now, large change sensitivity based fault diagnosis has been limited to the AC frequency domain. This paper presents a method to use large change sensitivity for nonlinear circuit fault diagnosis in the DC domain. Combined with the previous DC technique we propose an algorithm for constructing a nonlinear circuit fault dictionary. Advantages of this algorithm are that the benefits of large change sensitivity, namely computational efficiency, become available for nonlinear circuit testing. The method is restricted to single faults and circuits with one nonlinear resistor. Possible generalisation of the work is also discussed