trajectory curve

In order to realize biped steady dynamic walking, this paper adopted a trajectory of variable ZMP ( Zero Moment Point), which was defined as a cosine curve.

为了实现双足稳定动步行，本文采用了余弦可变ZMP（zero moment point）运动轨迹。

Trajectory always refers to straight line or space curve, so the key problem for trajectory tracking is image processing and providing information of the curve tracked to the motion control system.

轨线通常是指直线或空间曲线，轨线跟踪要解决的关键问题是图像处理和为运动控制系统提供所要跟踪曲线的信息。

The shape of the curve in the wellbore trajectory of horizontal wells is a complex three-dimensional space curve of arbitrary curvature and torsion. Its curved shape greatly affects the status of the column by the force and analysis of the follow-up column mechanics.

水平井全井井眼轨迹曲线形状是一条复杂的具有任意曲率和挠率的三维空间曲线，其弯曲形态极大地影响了管柱的受力状况和对后续的管柱力学的分析计算。