axis of rotation


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Related to axis of rotation: Instantaneous axis of rotation

axis of rotation

line about which an object rotates, e.g. hinge pin (see also Table 1)
Table 1: Joint axes of rotation within the foot
Joint (axis orientation)Primary movement about axis of rotationOrientation of axis of rotation to body planes
HorizontalFrontalSagittal
Ankle (lateral/plantar/posterior to medial/dorsal/anterior)Dorsiflexion; plantarflexion85°
Subtalar (lateral/plantar/posterior to medial/dorsal/anterior)Supination; pronation42°48°16°
Midtarsal (lateral/plantar/posterior to medial/dorsal/anterior)Oblique axis
Supination; pronation
52°57°
Longitudinal axis
Inversion; eversion
15°
First ray (medial/plantar/posterior to lateral/dorsal/anterior)Dorsiflexion with inversion; plantarflexion with eversion12°45°45°
Fifth ray (lateral/plantar/posterior to medial/dorsal/anterior)Dorsiflexion with eversion; plantarflexion with inversion20°55°70°
References in periodicals archive ?
If the grating were perfectly flat and infinite in extent, any displacement relative to the axis of rotation would not introduce any error, as this would not change the rotation angle of the grating surface.
As the telescope tracks radio sources, the phased array feed is kept in a fixed orientation to the sky, thanks to a special axis of rotation built into each ASKAP antenna.
The benefits of the SDK include access to an additional axis of rotation (viewing axis - roll), lower latency times and the availability of absolute rotational data.
Another surprising finding based on Ulysses' data is that the sun's magnetic field originates from a magnet that seems to be perpendicular to the sun's axis of rotation (instead of being parallel to it, as is the case with Earth).
The layout of the robot cell is the following basic technical conditions reflect: the basis of the system is a KUKA robot on a linear unit that allows automates the process of thermoplastic tape winding and tape laying by male mold and the axis of rotation and the process of the thermoplastic tape placement using negative form on the span.
VSN's Kin-Dex (TM) System uses this patented methodology to ensure that a rotor's axis of rotation is precisely and repeatedly defined in the balancing machine, thereby ensuring that unbalance readings accurately indicate rotor unbalance and minimize uncertainty due to positioning variations.
The layers probably formed as dust, ice, and snow were deposited on the ground during recent ice ages, which occurred during periods when the tilt of Mars's axis of rotation was higher than usual.
Were the arms identical, lines drawn through the same features of each arm should meet at the chandelier's axis of rotation.
This sturdy aluminum casting provides the best way to center the nodal point over the axis of rotation and it raises the camera to maximize the downward view.
The Earth is like a spinning top, and if you put more mass on one side or other, the axis of rotation is going to shift slightly," said Felix Landerer of NASA's Jet Propulsion Laboratory in Pasadena, California.
Indeed, theorists have calculated that over hundreds of thousands of years, Mars' axis of rotation can tilt by as much as 50 degrees.
One of the smallest models analyzed tested the ability of a part to handle temperature and mechanical loads and remain symmetrical around an axis of rotation.