nutation

基本解释

The international research progress of the non - rigid Earth nutation is reviewed briefly.
对目前国际上有关非刚体地球章动研究的进展作了简要回顾。
The department of satellite design and the staff on the ground have conducted a way of thruster calibration execution in terms of the data of the attitude and the nutation principle.
卫星设计部门和地面工作人员根据卫星的特点，利用姿态数据及章动原理建立了一套标定推力器对称性的方法。
Study was conducted on the change of fresh weight, moisture and the aril total-sugar of logan before and after the fruit cluster nutation by choosing the extremely serotinous variety-Lidongben.
以晚熟龙眼品种立冬本为试材，研究了果穗垂头前后果实鲜重、各组织的水分及假种皮总糖的变化。

a periodic variation in the precession of the earth's axis causing the earth's poles to oscillate about their mean position

章动
This paper focuses on the basic problems which include the principle, transmission ratio formula, construction design, parameterization dummy assembly, digital simulation of running for nutation drive.
章动齿轮传动系统的诸多优点决定了它在实际工程中具有广阔的前景。本文以渐开线直齿圆锥齿轮章动传动原理、传动比计算、结构设计、参数化虚拟装配和运动仿真等基本问题为研究目标,主要完成了以下工作。
进动
Nutation drive's research mainly concentrates to the geometrical shape of the bevel gear tooth profile and its processing method research in domestic and foreign.
国内外对进动传动的研究主要集中于对锥齿轮齿廓的几何形状及其加工方法的研究。
电子、通信与自动控制技术
章动
At last, ISAR imaging method for midcourse objects based on nutation is proposed, and the results of simulation experiment are shown.
最后,以旋转对称弹头为研究对象,提出了基于章动的弹道目标ISAR成像方法,并利用仿真数据进行了成像实验,给出了成像结果。
能源科学技术
进动
First of all, nutation principle was studied; spatial mechanism model was established.
首先，研究了进动啮合理论，建立起轮齿成型的空间机构模型。
天文学
章动