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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 ring rotation umbrella is a common rotating parachute, drop movement is severely affected by the cross wind. Based on the high-speed photography and image processing technology of the parachute experiment, the horizontal and vertical trajectory data points of the vortex ring parachute system are extracted, and the aerodynamic parameters are identified by genetic algorithm with the ballistic model. The paper analyzes the influence of crosswind on the ballistic characteristics of swirling ring system. The results show that the axial force coefficient of swirling ring is 1.02, which is larger than other types of umbrella. Reached a stable; horizontal wind on the trajectory of the system a greater impact on the speed and speed of the smaller impact.