Abstract
The damping characteristics of a current collection system were examined. The following three categories of damping were selected: 1. (1) damping in the brush material due to rheological properties of the brush material (called internal friction); 2. (2) damping in the interface between the brush and the holder or between the brush and the rotor (called interface damping); 3. (3) fluidic damping, or viscous damping, due to interaction with the ambient fluid, such as air, vapor etc. The theoretical analysis of several types of mechanisms and models is postulated. The experimental tests for measurements of the damping parameters are suggested. The analytical methods of calculation of the equivalent of damping constants to be used in the standard stability analysis are presented.
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