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Boundary conditions for skip entry trajectory

机译:跳过进入轨迹的边界条件

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摘要

Precise landing, range modification and high speed control are the main features of the skip entry trajectory. To fulfill these features some boundary conditions are needed to be known, pull-up and exit point are one of them. These have the applications in guidance, control and telecommunication. Feasibility analysis for the calculations of parameters at these conditions using the analytical method instead of solving the complete 3DOF or 6DOF equation of motion is done. For a given entry flight path angle and lift to drag ratios the pull-up altitude, velocity, aerodynamic deceleration as a pull-up parameters and exit velocity as an exit parameters are calculated. Although the maximum deceleration occurs near pull-up altitude and in the literature sometimes they are treated as a same boundary condition. The difference between these two conditions is also analyzed. Using the assumption of planer entry the 3DOF equation of motion is simulated for the purpose of comparison.
机译:精确着陆,航程修改和高速控制是跳过进入轨迹的主要特征。为了实现这些功能,需要知道一些边界条件,上拉和出口点就是其中之一。这些在制导,控制和电信中都有应用。在这种情况下,使用解析方法而不是求解完整的3DOF或6DOF运动方程式来进行参数计算的可行性分析。对于给定的进入飞行路径角度和升阻比,将计算上拉高度,速度,空气动力学减速度作为上拉参数,并计算出口速度作为出口参数。尽管最大减速度发生在上拉高度附近,但在文献中有时将它们视为相同的边界条件。还分析了这两个条件之间的差异。为了进行比较,使用刨床进入的假设,模拟了3DOF运动方程。

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