过失速重新定向机动过程气动特性建模
Aerodynamic characteristics modeling of post-stall re-orientation maneuver
孔轶男 1伍彬 2汪清 1陈功 1余婧3
作者信息
- 1. 中国空气动力研究与发展中心计算空气动力研究所,绵阳 621000;空天飞行空气动力科学与技术全国重点实验室,绵阳 621000
- 2. 南京航空航天大学航空学院,南京 210016;上海机电工程研究所,上海 201100
- 3. 中国空气动力研究与发展中心计算空气动力研究所,绵阳 621000
- 折叠
摘要
以过失速重新定向技术为基础的自翻转越肩飞行器与传统越肩发射飞行器相比,具有响应时间短、机动性能高、射程远等优势.本文针对飞行器过失速重新定向机动过程,基于CFD动态计算数据分析了该过程中的飞行器气动特性,通过改进微分方程模型成功描述了机动过程中的迟滞环效应,同时验证了最小二乘支持向量机方法在此建模问题中的适用性.本文的建模方法可以准确捕捉飞行器过失速重新定向机动过程中的非线性非定常气动特性,为飞行器过失速重新定向机动控制律设计提供模型基础.
Abstract
Compared to traditional over-shoulder-launched aircrafts,aircrafts based on the post-stall re-orientation technique have operational advantages,such as short response time,high manoeuvrability,and long range.Therefore,it is an advantageous option for the new generation of air-launched aircrafts to achieve omnidirectional attack.Focusing on the manoeuvre course of the post-stall re-orientation slender body,CFD simulations were performed to analyze the aerodynamic characteristics in this study.By improving the differential equation method,the hysteresis characteristics that exist in the post-stall re-orientation process can be successfully predicted.At the same time,the applicability of the least square support vector machine(LS-SVM)method in modeling such a problem has been verified.The present method can capture the non-linear unsteady aerodynamic characteristics in the re-orientation process,which provides a foundation in the control law design for post-stall re-orientation slender body.
关键词
过失速重新定向/越肩发射/动态计算数据/气动特性建模Key words
post-stall re-orientation/over-the-shoulder launch/dynamic calculation data/aerodynamic modeling methods引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据