摘要
研究了重复使用运载器(RLV)末端区域能量管理段(TAEM)三维制导轨迹在线推演算法。根据RLV当前动压、位置和航向,规划动压参考剖面和横侧向参考轨迹,采用基于高度的质点动力学方程在线推演出满足过载、动压约束以及终点动压、位置和航向要求的三维轨迹。横侧向参考轨迹规划分为2个阶段,即消除横向位置误差兼顾减小纵向位置误差阶段和消除纵向位置误差阶段,提出了组合使用3种模态消除纵向位置误差的新方法。对于三维轨迹推演,提出了采用航迹倾斜角补偿法二次推演三维轨迹的新算法,修正终点位置误差超过自动着陆(ALI)容许范围的三维制导轨迹,使误差进入容许范围。仿真计算结果显示,该三维轨迹在线推演算法具有快速、准确、对初始点位置和航向分布鲁棒性强的特点。
An onboard 3-D guidance trajectory algorithm of terminal area energy management（TAEM） for reusable launch vehicle（RLV） was researched.According to initial dynamic pressure,position and heading,an onboard 3-D trajectory can be propagated following the restrictions of dynamic pressure,normal overload,final dynamic pressure,final position and final heading.Based on onboard generated reference dynamic pressure profile and lateral reference trajectory,propagation of 3-D trajectory was fulfilled by means of dynamics functions of center of mass.Lateral reference trajectory planning includes 2 steps,that is,erasing lateral position error,in which longitudinal error is reduced simulataneously,and erasing longitudinal position error.According to size of longitudinal position error,3 modes of trajectories were used to erase it by a set of logical procedures.In 3-D trajectory propagation stage,if the final position of trajectory generated by 3-D propagation exceeds the allowable scope,the path angle was compensated and the 3-D trajectory was propagated once more to generate an eligible trajectory.The simulated results show that the trajectory algorithm can propagate a 3-D guidance trajectory fast,exactly and has strong robustness in the distributions of initial position and heading.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2010年第1期41-47,共7页
Acta Armamentarii
关键词
飞行器控制、导航技术
重复使用运载器
末端区域能量管理段
三维制导轨迹
在线推演
横侧向参考轨迹
control and navigation technology of aerocraft
reusable launch vehicle
terminal area energy management
3-D guidance trajectory
onboard propagation
lateral reference trajectory
