中国空间科学技术2024，Vol.44Issue(4)：130-141,12.DOI:10.16708/j.cnki.1000-758X.2024.0064
深度神经网络辅助的垂直回收火箭在线轨迹优化方法
A deep neural network assisted trajectory optimization algorithm for vertical landing vehicles
摘要
Abstract
It is challenging to solve the powered descent guidance problem online for its computational cost and uncertain initial conditions.An Hp-pseudospectral convex optimization algorithm assisted by deep neural network is presented.For the highly nonlinear dynamics in atmosphere,it is proved for the first time that the thrust magnitude profile has the Bang-Bang feature based on variational method and Pontryagin's maximum principle.In the wide range of initial states,the deep neural network is applied to learn the segment feature of optimal thrust offline.Then the trained neural net is embedded in the online successive convex optimization algorithm,which combines the Hp-pseudospectral discretization with Bang-Bang feature.This learning assisted strategy leads to more accurate results with the same number of discretized nodes.Numerical simulations show that the proposed algorithm shows better computational efficiency and adaptability to initial conditions.关键词
垂直回收/深度神经网络/轨迹优化/分段伪谱离散/凸优化Key words
vertical landing/deep neural network/trajectory optimization/Hp-pseudospectral discretization/convex optimization分类
航空航天引用本文复制引用
王亚洲,佃松宜,向国菲..深度神经网络辅助的垂直回收火箭在线轨迹优化方法[J].中国空间科学技术,2024,44(4):130-141,12.基金项目
四川省自然科学基金(23NSFSC1186) （23NSFSC1186）
