Through the mechanical analysis, the differential equation for the longitudinal deformation of cold forming steel is derived, and the formula for longitudinal rotation angle is obtained.
对冷弯型钢的纵向变形过程进行了力学分析，得到了变形微分方程，求得了转动角的理论公式，并对其变形形状进行了分析计
Both the distance of the moving path of the ball and the rotational angle of the attacker have been taken into account synthetically, thus the best shooting area is selected in the two high efficient areas.
为提高机器人足球比赛中射门的成功率,分析了守门员的死角,并用"死角"法求出了射门的高效区,在求出的两个高效区中综合考虑球的运动路径长短和我方机器人转动角度等因素,确定了最佳射门区域。
The one contains the lower powers of deformation gradient, by which the formula of the principal rotation angle and the explicit representation of principal axis are obtained; the other, a high efficient method to obtain the rotation tensor, does not contain the complicated coefficients and uses few variables.
本文利用Ｃａｙｌｅｙ＿Ｈａｍｉｌｔｏｎ定理，给出了两种直接获得转动张量显式表示的方法·一种为只含变形梯度较低次幂的表达形式，利用此表示，获得了主转动角的计算公式和主转动轴的显式表示·而另一种则是不含复杂系数且含变量个数较少的高效获得转动张量的方法·进一步，给出了主转动角和主转动轴的一些性