结果表明：制动盘端面跳动最终以虚拟制动盘厚度变化形式引起制动力矩的波动。

The results show that disc side face run-out results in brake torque variation by means of disc thickness variation.

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结果表明：采用稳健性设计的永磁式缓速器可以较好地改善制动力矩波动率。

All results show that permanent magnet type retarder using robust design technique can decrease braking torque fluctuation.

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