Hidden Faults、Masking Failure Faults and Multiple Faults Diagnosis

摘要

Routine algorithms cannot diagnose multiple faults caused by hidden faults and masking failure faults in the system. In this paper, we propose an algorithm of identifying hidden faults and masking failure faults, analyze their relations to multiple faults and exclude the masking failure faults in the system through adding few test nodes in the system DFT. It can quickly find out the faulty components through analyzing the masking failure faults and hidden faults, saves cost of diagnosing faults, shortens test time and reduces the difficulty of diagnosing the multiple faults. Finally, the algorithms are validated by the examples.