The common reliability targets are reliability probability and m 'ttf (Mean Time To Failures). MTTF features directly and distinctly, so it is more convenient.

工程中常用的可靠性指标有可靠度和平均寿命，平均寿命指标直观、物理概念清晰，使用更加方便。

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If you know the mean time between failures and the mean time to recovery, e.g. for the hardware, use the calculations in this section.

如果知道失效之间的平均时间和平均恢复时间(例如对于硬件)，则使用这一部分中的计算方法。

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The paper introduces a practical method to calculate the mean time between failures (MTBF) of ac servo controllers, using the components counting prediction method.

介绍了采用元器件计数预计法的伺服驱动控制的平均故障间隔时间(MTBF)实用计算方法。

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