行星齿轮系统(34)与马达的输出轴(33)相连，以产生转速降低的输出。

An epicyclic gear system (34) is attached to the output shaft (33) of the motor, to produce an output of reduced rotational speed.

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详细介绍了主动转向系统的结构和组成，以及核心部件双行星齿轮机构的工作原理及工作模式。

The structure and makeup of active steering system, the operating principle and operating mode of dual planetary gear mechanism are introduced in detail.

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深入地研究了单环路封闭式行星齿轮传动系统的动态特性；

The dynamic behaviors of encased differential gear train had been systematically re- searched.

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