Node Voltage Increment Ratio Fault Dictionary and Its´ Geometric Models for Linear Analog Soft Fault Diagnosis with Tolerance

This paper address itself to linear analog soft fault diagnosis by means of node voltage increment ratio fault dictionary approach. The fundamental theory of node voltage increment ratio for linear analog soft fault diagnosis is proposed in this paper. How to extend some points of view in geometry to analog fault diagnosis is also proposed. In case of considering component tolerance, four geometric models based on the node voltage increment ratio fault dictionary are designed to improve the accuracy of fault identification. An example verifies the correctness and effectiveness of the theory and the models, and the obtained results manifest the usabilities of them.