国防科技大学学报2024，Vol.46Issue(1)：22-31,10.DOI:10.11887/j.cn.202401003
返回器飞行管道的快速预测算法
Fast prediction algorithm of flight pipeline of reentry capsule
摘要
Abstract
To meet the computational requirements of safe airspace and the expected landing point in the recovery mission of the reentry capsule,a fast prediction algorithm of the flight pipeline based on the Koopman operator approach was proposed for the reentry capsule and the determination process for safe flight airspace of search and rescue helicopters was provided.The body-parachute dynamic model was constructed.A group of discrete state points was uniformly selected from the random state space by using the Halton sampling method,and the multiple possible trajectory was calculated.Based on the back pulling mechanism of Koopman operator,the initial probability density value was associated with the current state to obtain the flight pipeline and desired trajectory of the reentry capsule and its separation parts under uncertain conditions.The simulation results show that the fast prediction algorithm of the flight pipeline based on the Koopman operator approach is significantly better than the Monte Carlo method in terms of convergence speed and accuracy.After using the flight pipeline calculation results to plan the flight route of the rescue helicopter,the collision risk is reduced by 54%at most and the corresponding search time is reduced by 70%.The proposed algorithm has been successfully applied to the Chang'e-5 recovery mission.关键词
降落伞回收技术/不确定性分析/Koopman算子/返回器/探月任务Key words
parachute recovery technology/uncertainty analysis/Koopman operator/reentry capsule/lunar missions引用本文复制引用
邹文,张国斌,丰志伟,涂国勇,禄晓飞,张青斌,杨涛..返回器飞行管道的快速预测算法[J].国防科技大学学报,2024,46(1):22-31,10.基金项目
国家自然科学基金资助项目(11902331) （11902331）
