运动学

A preliminary kinetic explanation about the chaotic characteristics of the floating drifters was given in this paper.

作者从运动学上对弯曲急流区的漂流浮标混沌特性给出了解释。

Then the error models of the SINS and the GPS are established respectively, and the kinematics and the dynamics equations of the guided shell are founded with which ballistic trajectory of ERGS is simulated.

建立了制导炮弹弹体运动学和动力学方程，并进行了超远程炮弹的弹道仿真计算。

Reversible cutting can be classified into three categories in terms of cutting movement: reversible feed motion, reversible primary motion, and reversible composite motion.

研究了可逆向车削、铣削、刨削、钻削和铰削以及复合可逆切削的运动方式和特点，建立了车削、铣削、刨削、钻削和铰削、车铣的运动学图谱。

This paper presents a new type of finger based on pneumatic bending joint and establishes the kinematics equation of the finger by using coordinate system transform.

提出了一种新型气动弯曲关节手指，并应用坐标变换的方法建立了手指的运动学方程。

In this dissertation, on the basis of the rolling principle and kinematic analysis for the drive pairs, a new idea of the revolutionary surface envelope globoidal worm gearing with rolling friction and point engagement is proposed; the point engagement theory, the engaging features, the mechanism errors and adaptation, the engaging efficiency, and the design and machining technology are systematically studied; the prototype is manufactured and the experiment is performed, and the related theory and technology are verified.

本文在对传动副实现滚动的机理及运动学分析的基础上，提出了滚动式回转面包络点啮合环面蜗杆传动的基本构思与技术框架，并深入系统地研究了滚动式回转面包络点啮合环面蜗杆副的啮合原理、啮合特性、误差敏度及适应性、啮合效率、设计和制造方法；研制了原型机并进行了原型机实验等。

In this paper,kinematic and dynamic analysis of crank-coupler cutting mechanism of full-feeding rice combine were made,and their computing models were set up.

对全喂入水稻联合收割机切割机构进行了运动学和动力学分析，建立计算模型。

Aiming at the key technology of numerical control, taking NC gear shaper as research object, some issues are studied in this paper.1 NC gear shaper YK5120 was developed.1 Three dimensional model of NC gear shaper is built, kinematics simulation and interference checking of NC gear shaper are carried out.2 Based on kinematic theory of multi-body system, the precision of gear shaper and the error of generated gear are analyzed and simulated.3 Applying finite element software, the natural frequency and mode of NC gear shaper are analyzed.

本文针对插齿机数控化中的关键技术，以数控插齿机为研究对象，做了以下研究工作：1 设计完成YK5120型数控插齿机机械结构；2 建立了数控插齿机的三维模型，并对其进行了运动仿真和干涉检验；3 以多体系统运动学理论为基础，对数控插齿机的精度和齿轮加工误差进行了分析与仿真；4 应用有限元软件，对数控插齿机的各阶固有频率及振型进行了分析。

With the change of the initial vector of the Newton iteration algorithm, it is easy to find the assembly modes of the hexapods.

首次就迭代初始向量的不同选取，快速、准确地对并联机构运动学正解的多解进行了数值求解。

The mechanism of some typical hexapods has been discussed, the advantages and backwards of it have also been analyzed. 2 Workspace analysis is a very important aspect of mechanism analysis.

工作空间是并联机器人机床的重要指标，为了方便、快速地求得并联机构的工作空间，提出了基于并联机构运动学逆解的工作空间极限边界数值搜索算法。

Through experiment and the analysis of tectonic evolvement, this paper discusses the causation of the coincidence of formation water and hydrogen sulphide.

通过模拟实验和地层理藏演化史分析，从硫化氢生成条件及地层流体运动学角度探讨了这一现象的成因。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。