Describes a picking dynamic model of four degrees of freedom for medium picking motion on K251 silk loom.

建立了K251型丝织机的中投梭机构四自由度击梭动力模型。

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The mathematic model has four degrees of freedom (surge, sway. yaw and roll), taking the couple motion of roll on horizontal plane motion into account.

预报采用进退、横漂、首摇和横摇四个自由度的方程，考虑了横摇对水平面运动的耦合影响。

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The biggest upgrades from the original Robonaut are R2's thumb, which now have four degrees of freedom (as opposed to three), and its overall speed, which have improved by a factor of four.

相比原始的机器宇航员，R 2最大的升级是拇指和整体速度；现在的拇指具有四个自由度(之前只有三个)，同时速度通过四个因素进行了提升。

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Worn over the legs with a harness that reaches up the back and around the shoulders, X1 has 10 degrees of freedom, or joints -- four motorized joints at the hips and the knees, and six passive joints that allow for sidestepping, turning and pointing, and flexing a foot.

ENGADGET: NASA and IHMC building X1 exoskeleton to give us a lift, keep us fit in space and on Earth