A novel method for circuit fault modeling and simulation in virtual maintenance

In order to achieve diversiform and flexible circuit tests, a novel method for fault circuit real-time simulation in virtual maintenance is proposed. By using the dynamic link library, which is generated by secondary development of NGSPICE, the system can simulate fault circuits in real-time manner and acquire the voltage and current values of each circuit node. Then, circuit status can be analyzed and estimated. The results of simulation prove that the test results are constitute with results from real situation, and the method proposed in this paper can extend the function of the virtual maintenance system.