Nutation - Wikipedia
网页Nutation (from Latin nūtātiō 'nodding, swaying') is a rocking, swaying, or nodding motion in the axis of rotation of a largely axially symmetric object, such as a gyroscope, planet, or bullet in flight, or as an intended behaviour of a mechanism.
章动 - 百度百科
网页章动（nutation），是天文学术语。 当陀螺的自转角速度不够大时，则除了自转和进动外，陀螺的对称轴还会在铅垂面内上下摆动，称为章动。 章动数值通常可以分为平行和垂直于黄道的两个分量，在黄道上的分量称为黄经章动，垂直黄道的分量称为斜章动。
5.9: Precession and Nutation - Physics LibreTexts
网页2020年12月30日 · Where precession, in terms of the angles used in this section, represents a change in θ, nutation is associated with a change in the tilt angle ϕ. It comes about in several cases, most commonly due to the action of a second force, and often results in a periodic motion (hence the name nutation, ‘nodding’).
MRI基础知识——自旋、进动及章动 - 知乎 - 知乎专栏
网页这种质子既绕着Z轴方向旋转，又绕着X轴方向旋转的运动，我们把它叫做章动（Nutation）。章动是质子同时在两个方向进动的宏观反应。 章动是质子同时在两个方向进动的宏观反应。
Astronomical nutation - Wikipedia
网页Astronomical nutation is a phenomenon which causes the orientation of the axis of rotation of a spinning astronomical object to vary over time. It is caused by the gravitational forces of other nearby bodies acting upon the spinning object.
Nutation | Definition, Causes, Period, & Facts | Britannica
网页Nutation (Latin nutare, “to nod”) superimposes a small oscillation, with a period of 18.6 years and an amplitude of 9.2 seconds of arc, upon this great slow movement. The cause of nutation lies chiefly in the fact that the plane of the Moon’s orbit around Earth is tilted by 5.15° from the plane of Earth’s orbit around the Sun .
6.8: Nutation - Physics LibreTexts
网页Earth’s axis of rotation nutates because it is subject to varying torques from Sun and Moon – the former varying because of the eccentricity of Earth’s orbit, and the latter because of both the eccentricity and inclination of the Moon’s orbit.
What causes precession or nutation in a spinning object?
网页So, the nutation is a cyclic energy conversion process: There is a stage of giving in to the torque that is being exerted. During that stage the torque is doing work and the kinetic energy of the spinning object increases, which goes to the precession rate.
Nutation | Description, Example & Application - Your Physicist
网页2023年3月17日 · Nutation is a small, oscillatory movement of an object around a fixed point or axis. It is a common phenomenon observed in various systems, including celestial bodies, mechanical systems, and biological organisms.
Nutation - NASA
网页Nutation is the short-period oscillations in the motion of the pole of rotation of a freely rotating body that is undergoing torque from external gravitational forces. Nutation of the Earth’s pole is discussed in terms of components in obliquity and longitude.
跳至内容