In electric railway systems, wear of current collector devices leads to high maintenance cost. To develop a cost reduction methodology, the wear behavior of current collector materials needs to be fully investigated. However, the wear test apparatuses currently in use cannot control the contact force between materials, and the contact force fluctuates. It is difficult to classify accurate conditions of a wear transition under contact force fluctuation. To solve this problem, we propose a force control system with acceleration and velocity feedbacks to suppress the force fluctuation. The positive feedback of acceleration compensates the periodic force fluctuation at frequencies according to the sliding velocity of rubbing surfaces. The velocity feedback compensates the force fluctuation caused by resonance. The proposed control system is validated by experiments using a prototype of a rotary wear test apparatus.

中文翻译：

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减少旋转磨损测试设备的接触力波动

在电力铁路系统中，集电器装置的磨损导致高维护成本。要开发降低成本的方法，需要对集电器材料的磨损行为进行全面研究。然而，当前使用的磨损测试设备不能控制材料之间的接触力，并且接触力会波动。在接触力波动下很难对磨损过渡的准确条件进行分类。为了解决这个问题，我们提出了一种具有加速度和速度反馈的力控制系统，以抑制力波动。加速度的正反馈根据摩擦表面的滑动速度补偿频率上的周期性力波动。速度反馈补偿了共振引起的力波动。