Research on Time Domain Characteristics and Mathematical Model of Electromagnetic Radiation Noise Produced by Single Arc
Current-carrying sliding friction pair is the key part of many systems such as high-speed railway’s pantograph-catenary system, electromagnetic gun’s launch system, and space satellite’s solar panel system. Arc discharge phenomenon will occur due to sliding electrical contact fault. It will radiate high-intensity electromagnetic noise. The electromagnetic radiation noise (EMRN) will disturb communication system, even cause failure of the whole system. EMRN experiments under single arc conditions were carried out with the self-developed experimental system in anechoic chamber environment. The time domain characteristics of EMRN were analyzed under different measure distance and contact current conditions. The time domain waveform of EMRN is symmetrical and convergent. Its continuous time is shorter than 0.8  $\mu \text{s}$ . A mathematical model of the time domain waveform was established by using the least-square method. The performance of the model was evaluated by using determination coefficient, residual standard deviation, and correlation coefficient. The time domain waveform obtained from the model is almost the same as the waveform measured from experiments.