This paper introduces briefly the control principle of trajactory correction technique and analyzes the structures and application areas of several typical trajectory correction mechanisms such as paddle type ring and D ring etc.

简要介绍了 弹道修正技术的控制原理；分析了桨式、D型环等几种典型弹道修正装置的结构特点和应用范围；

To overcome this difficulty the Gear algorithm which is especially suitable for solving rigid differential equations has been introduced in the calculating of stochastic trajactory model and achieves considerable success .

为此，本文将适用于求解刚性方程组的Gear算法应用于随机 轨道模型的计算中，取得了良好的效果。

The application of gear algorithm in stochastic trajactory model

GEAR算法在随机 轨道模型计算中的应用

The kinematic characteristics of the rearward separate-planting mechanism were theoretically analyzed and its kinetic process was simulated by monitoring the six selected points on the motion trajactory of the tip of seedling .

通过秧针端点运动 轨迹上的6个特定点，对后插式分插机构的运动学特性作了理论分析和计算机模拟，并利用高速摄像对机构运动学分析进行了试验验证。

It can be seen from this article that the two methods have demonstrated the working capacity for calculation of frictional force and thermal load on surface of a hypersonic winged flight vehicle which moves in dense atmospheric layers on a trajactory with stationary values of velocity head .

由文可见，对于在 稠密大气层 内，沿 轨道运行头速度恒定的高超声速有翼飞行器，能够用本文所采用的两种方法计算其表面摩阻和热载荷。