阻力和升力加速度指令快速解析与跟踪制导

Drag and lift acceleration commands rapid calculation and tracking guidance

针对升力式飞行器的滑翔段制导问题,提出一种阻力和升力加速度指令在线快速解析与跟踪制导方法。通过一维质点运动学解析并加权直接得到阻力加速度指令。引入虚拟目标和伪视线角的概念,将比例导引应用于滑翔段得到升力加速度指令。利用阻力加速度和攻角的单调性关系,通过改变攻角跟踪阻力加速度指令。倾侧角用于辅助跟踪阻力加速度指令,满足给定条件后切换至跟踪升力加速度指令。航迹方向角的控制通过倾侧角按反转走廊边界改变正负号实现。动压、热流、过载等约束可通过相关敏感参数的设计得到满足。所提方法不依赖参考轨迹和攻角剖面,计算量小,可实现对终端速度和终端高度的高精度控制。

For the gliding flight phase guidance problem of lifting vehicle,a drag and lift acceleration commands rapid calculation and tracking guidance method is proposed.Drag acceleration command is calculated directly by one-dimensional particle kinematics and weighting.By introducing the“virtual target”and“pseudo line of sight angle”concepts,proportional navigation is used in gliding flight phase to give the lift acceleration command.Using the monotonicity of the drag acceleration and the attack angle,the attack angle is used to track drag acceleration command.The bank angle is used to track drag acceleration command in a supplementary way in the early stage.After a given criterion is satisfied,the bank angle switches to track lift acceleration command.The azimuth angle control is realized by changing the sign of the bank angle according the reverse corridor border.The dynamic pressure,heat flow,and overload constraints can be satisfied by specific sensitive parameters design.The proposed method does not need reference trajectory or attack angle profile,and the amount of calculation is small.It can control the terminal velocity and height with high accuracy.