横风对涡环旋转伞系统运动的影响  

Effects of Lateral Wind on Motion of Vortex Ring Parachute System

作　　者：马晓冬[1] 刘荣忠[1] 郭锐[1] 吕胜涛[1] 

机构地区：[1]南京理工大学机械工程学院智能弹药技术国防重点学科实验室,南京210094

出　　处：《航天返回与遥感》2015年第5期1-9,共9页Spacecraft Recovery & Remote Sensing

基　　金：国家自然科学基金(11102088);江苏省研究生培养创新计划(CXLX12_0210)

摘　　要：涡环旋转伞是一种常见的旋转降落伞,下落运动过程受横风的影响严重。基于伞塔实验的高速摄影和图像处理技术,提取涡环旋转伞系统水平和竖直方向的弹道数据点,结合弹道模型,利用遗传算法对气动力参数进行识别。文章分析了横风对涡环旋转伞系统弹道特性的影响,结果表明:涡环旋转伞的轴向力系数为1.02,大于一般其他类型伞;涡环旋转伞系统在横风作用下能很快达到稳定;横风对系统运动轨迹的影响较大,对落速和转速的影响较小。Vortex parachute, whose falling motion is affected greatly by lateral wind, is a kind of typical rotating parachute. Based on high-speed photography of parachute tower test and image processing technology, the trajectory data points of the vortex ring parachute system in vertical and horizontal direction are extracted. And in combining with the trajectory model, the aerodynamic parameters of the system are recognized with genetic algorithm. The effects of lateral wind velocity on the trajectory characteristics are analyzed theoretically. The results show that the tangential force coefficient is 1.02, which is greater than that of other typical parachutes. The vortex ring parachute system can reach a steady state in lateral wind in a short time. Lateral wind has a great effect on the trajectory, but little effect on the falling velocity and the rotating speed. The study method is as a reference for other kinds of parachute systems.

关 键 词：涡环旋转伞 伞塔实验 图像处理 横风 降落伞 

分 类 号：V211.73[航空宇航科学与技术—航空宇航推进理论与工程]