libration

Study on Frequency Characteristics of Libration in Aerostatics Radial Bearing

晶体管的频率特性气体静压轴颈轴承振动频率特性研究

Chaos and its control in the planar libration of a magnetic rigid spacecraft with internal damping in an elliptic orbit are investigated.

研究在具有内阻尼的磁性刚体航天器在椭圆轨道上平面天平动的混沌及其控制。

Especially, the author researches the coupling libration of water and dam detailedly.

特别对库水与坝体耦合振动问题进行了详细的阐述.

Deep space explorers should be positioned around collinear libration points L_1 or L_2 of the Sun-Earth ( Moon) system to carry out exploration missions. Due to instability of collinear libration points, station-keeping must be implemented during operation to achieve this.

深空探测器需要定位在日-地（月）系的共线平动点L1或L2附近执行探测任务，但由于共线平动点的不稳定性，必须在运行期间进行轨控。

By these judging conditions, the effects on the linear stabilities of the triangular libration points in the classic restricted three-body problem with drag are discussed. Some Murray's results are improved.

用这些判断条件，讨论了一些阻力对经典限制性三体问题三角平动点线性稳定性的影响，改进了Murray等的一些结果。

Influence of the lunar libration models on uto determination from lunar laser ranging

月球天平动模型对激光测月解算UT0的影响

The L_1 libration point and the halo orbit around the L_2 point in the Earth-Moon system play an important role in exploring the Moon. It can link the Earth with the nearside and farside of the Moon, respectively.

地-月系统的平动点L1点及L2点的Halo轨道在探月工程中有重要的应用价值，可分别用于地月连续通信覆盖和月球背面的探测。

There are plenty of families of periodic orbits surrounding the collinear libration points in Circular Restricted Three-body Problem ( CRTBP) model.

圆型限制性三体问题（CRTBP）共线平动点附近存在着大量的周期轨道族。

On Characteristics of Collinear Libration Points and Their Applications in Deep Space Exploration

关于共线平动点的特征及其在深空探测中的应用

Owing to the phenomenon of libration it is possible to observe up to 60% of the total lunar surface.

由于天平动的现象，我们可能观测到月球总面积的60%。

Applications of the Triangular Libration Points in Deep Space Explorations

ph.1.三角测量点三角平动点在深空探测中的应用前景

I view a very practical one, a calibration method.

本人看法:很实用的一本书, 给出了calibration的方法.

Notice no heavier strike or libration in course of moving.

注意在移动过程中,不得有较重的撞击与振动.

The collinear libration point L2 of the earth-moon system plays an important role in exploration of the back of the moon for its relatively fixed position with respect to the earth and the moon.

地&月系共线平动点L2相对地球和月球不变的空间位置使得它在月球背面探测任务中起着十分重要的作用。

Linear Strategy for Positioning of Spacecraft around the Collinear Libration Points

深空探测器定位在共线平动点附近的线性策略

Low noise, libration, power consuncption.

整机噪声小 、 振动小、功耗比小.

Some judging conditions for the linear stability of the libration points in the perturbed restricted three-body problem are given. These conditions only depend on the coefficients of the characteristics equations of their tangent maps and are applied expediently.

给出了受摄限制性三体问题平动点线性稳定性的一些判断条件，条件只与相应的平动点切映像的特征方程系数有关，使用方便。

the effects of physical libration of moon on lunar satellites

月球物理天平动对环月轨道器运动的影响

Dynamics of deployment and libration of tethered satellite systems

绳系卫星释放及工作态动力学分析

The particles of slag powder processed by libration mill were mostly in ball and its surface was the most smooth.

振动磨所加工的矿粉颗粒大多呈圆形，表面最光滑。