Simple Suppression Method of Impact Oscillations Between a Pantograph and an Overhead Rigid Conductor Line

Wave-like wear on the surface of a conductor line in a railway current collection system often makes a pantograph separate from the conductor line. In the present study, we propose a simple method to suppress the contact loss between a pantograph and a conductor line. The current collection system can be modeled as a one-degree-freedom spring mass system. A flexible beam is added to this system to produce higher natural frequencies. In experiments, we found that the contact loss is strongly suppressed in a certain range of excitation frequency.