摘要
襟翼偏转气动计算是翼伞建模的关键问题,为提高翼伞动力学模型精度,本文引入襟翼偏转气动模型,提出CFD数值模拟与最小二乘辨识相结合的方法:数值模拟借助动网格动态捕捉翼伞外形与姿态变化,获取襟翼偏转气动数据;最小二乘法进行模型参数辨识,修正翼伞气动计算.研究表明襟翼偏转气动模型较好反映翼伞气动规律,对应动力学模型与空投试验数据接近,验证本文建模方法的有效性,为翼伞精确建模提供新思路.
The aerodynamic calculation of flap deflection is a key program of parafoil modeling. In order to improve the precision of parafoil dynamic model, an aerodynamic model of flap deflection was proposed based on a method combining CFD numerical simulation with least squares identification. Numerical simulation based on dynamic mesh was used to observe the change of parafoil shape and posture, which was responsible for obtaining aerodynamic data. Least squares used to identify the parameters of model, which was responsible for aerodynamic calculation of flap deflection. Research results show that, the aerodynamic model of flap deflection can better describe the aerodynamic rules of parafoil and the simulation results of parafoil dynamic model are close to airdrop test data, which verifies the effectiveness of the modeling method in this paper and provides a new idea for precise modeling of parafoil.
作者
孙青林
梁炜
陶金
罗淑贞
陈增强
贺应平
SUN Qing-lin LIANG Wei TAO Jin LUO Shu-zhen CHEN Zeng-qiang HE Ying-ping(College of Computer and Control Engineering, Nankai University, Tianjin 300350, China Department of Experiment, Aerospace Life-Support Equipment Co. , Ltd, Xiangyang, Hubei 441022, China)
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2017年第2期157-162,167,共7页
Transactions of Beijing Institute of Technology
基金
国家自然科学基金资助项目(61273138)
天津市重点基金资助项目(14JC2DJC39300)
关键词
翼伞
动力学模型
襟翼偏转
数值模拟
最小二乘法
parafoil
dynamic model
flap deflection
numerical simulation
least squares
