介绍HH204步进电机驱动电路在复费率计度器上的应用，给出了硬件电路和驱动程序。

This paper introduces the application of HH204 stepping motor's driver on multi-rate register, presents a circuit and driver program.

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该方法计及了各个子结构的剩余模态的作用，并能消去基本扇形的全体对接自由度，故这种精确的动力缩聚进一步提高了动态分析的效率。

It collects the residual mode contributions of various substructures, and then eliminates all interface degrees of freedom of the basic sector. Hence this accurate dynamic reduction fur...

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