And in these bearings here are shaft encoders, and they sense that the rotation that the outer housing makes in order to keep this thing pointing at the same direction.

在这些轴承中，有轴角编码器，它们感受到了外面的框的转动，来保持这个东西，指向相同的方向。

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Step motor control, by pulse by changing the order of electricity can change the motor rotation direction, change the pulse frequency can change the motor rotation speed.

步进电机受脉冲的控制，通过改变通电的顺序可改变电机的旋转方向，改变脉冲的频率可改变电机的旋转速度。

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With the help of the theory of quaternions the theorems of commutativity of composition for the finite rotation of rigid body are proved in the any order.

借助于四元数理论证明了任意顺序下刚体有限转动合成的可交换性定理。

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This means that we have some vessels that have been diverted in order to protect the onwards schedule, others have swapped the calls in the rotation and again others have been slowed down in order to match quay availability in New York.

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RadioAstron will also examine pulsars and the outer regions of spiral galaxies in order to get more precise measurements on their rate of rotation and distance from earth.

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To Jordan, every race had an order how riders should move up in a pack, the ideal rotation in a breakaway, a rhythm to be respected.

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