刚体空间

Methods\ A group of equations are obtained on the basis of rigid body dynamics and analytic geometry.

应用刚体动力学原理，在给定坐标系下建立智能雷飞行运动方程，通过空间解析几何方法获得智能雷扫描运动方程。

The space configuration of each vehicle is described by a 26-freedomed multi-body model.

用26个自由度的多刚体模型描述每节车辆的空间位形。

Under the assumption that the Earth is a triaxial rigid body which is rotating freely in the Euclidian space, the elliptic integral solution of the Euler dynamic equation is provided, and then the numerical solutions of the Euler dynamic as well as kinetic equation are realized.

在Euclid空间中，假定地球是一个作自由旋转的3个主惯性矩互不相等的刚体，给出了Euler动力学方程的椭圆积分解，并实现了Euler动力学方程和运动学方程的数值解。

A new method relying on the Stroh formulism and the theory of the surface impedance tensor was developed to investigate the dynamic instability of interfacial slip waves.The concept of the surface impedance tensor was extended to the case where the wave speed is of a complex value,and the boundary conditions at the frictionally contacting interface were expressed by the surface impedance tensor.Then the boundary value problem was transformed to searching for zeroes of a complex polynomial in the unit circle...

基于Stroh公式和表面阻抗张量理论，提出了研究界面滑移波动态失稳问题的一种新的方法·该方法将表面阻抗张量概念推广到复波速域，并将摩擦接触界面上的边界条件以表面阻抗张量表示·最终将边值问题化归为求解一个复多项式在单位圆内的根·以弹性半空间与刚体平面相对稳态摩擦滑移为例进行了详细的分析，导出了一个4次复特征方程并讨论了方程在单位圆内解的特性，给出了滑移界面波失稳条件的显式解析表达式

Vertical vibration of a rigid body on fluid saturated porous half space is studied.

研究圆柱形刚体在多孔饱和半空间上的垂直振动。

On the basis of the model, distribution of the first four order natural frequency is analyzed within workspace of the manipulator. Displacement error of moving platform is studied under excitations of external forces and inertial force. Maximum dynamic stress in each time and position of its occurrence are given.

在该模型的基础上，分析了机械手在工作空间的前四阶固有频率的分布情况；研究分析了在外力和刚体惯性力激励下机械手动平台的位置误差；给出了构件在各个时刻的最大动应力及其出现的位置。

Based on the methods of Lie group theory, we redefine the general workspace of the symmetry coordination methods.

特别是定义出能够连续描述刚体在空间旋转的姿态向量，避免了欧拉角描述方法所带来的旋转次序问题。

The inverse dynamics of the rigid multibody system is studied based on the spatial operator algebra theory, and the generalized mass procedure is realized in the environment of Mathematica 5.2 software.

应用空间算子代数理论，在通用计算机符号演算软件Mathematica5.2的环境下，对多刚体系统反向动力学进行设计与实现。

Because of Its wide-ranging connection with many applied science, such as the quantum physics, geostatic, the figure and pattern recognition and the space telemetry and so forth, the research in quaternion algebra is valuabe.

四元数在众多的应用问题中存在广泛的联系，如四元数在量子力学，刚体力学方面的应用，在计算机图形图像处理和识别方面的应用，在空间定位方面的应用等。

Plane and spatial linkages are also useful in creating mechanical motions for a point or rigid body.

平面机构和空间机构也是能使一个点或一个刚体产生机械运动的有用装置。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷