救生伞假人高速空投开伞动载试验
收稿日期: 2013-07-18
修回日期: 2014-03-18
网络出版日期: 2014-06-20
Experiment in Parachute-opening Shock of Life-saving Parachute and Dummy High-speed Airdrop
Received date: 2013-07-18
Revised date: 2014-03-18
Online published: 2014-06-20
对刚体假人和软体假人进行地面冲击试验，用小波方法将假人质心动载按不同频率和观察尺度分开，并分析了混沌特性参数随小波观察尺度的演化规律。对刚体假人进行高速空投试验，并用相平面分析假人质心动载与姿态的关联性。结果表明：假人质心动载波动集中在30~50 Hz的频段，软体假人对高频振荡具有良好的缓冲作用；质心动载的高频细节解随机性较大，高频干扰的误差放大率也较大，在刚体假人空投试验提取真实动载时应滤掉；高速空投试验过程中，拉直动载与开伞动载呈明显的负相关性，且开伞动载与假人的姿态角、角速度存在明显关联性，并得到了相平面中的有利开伞区域。
刘丹阳 , 贾月红 , 杨春信 , 王璐 , 宋炳辉 . 救生伞假人高速空投开伞动载试验[J]. 航空学报, 2014 , 35(6) : 1623 -1632 . DOI: 10.7527/S1000-6893.2014.0024
In the shock test of rigid and soft dummy, the overload signal of dummy censorial is decomposed into different temporal and frequency components using wavelet theory. The evolution of chaotic characteristics in varying temporal and frequency scales is examined as well. High-speed airdrop experiment of rigid dummy is also carried out and the relationship between parachute-opening shock and posture of dummy is analyzed using phase plane. Results show that the energy of dummy censorial centralized in frequency range of 30 Hz to 50 Hz and the soft dummy can better buffer high frequency shock than rigid. High frequency wavelet detail components are more random, in which the magnification error is higher so that the high frequency components should be filtered, when extract real shock value of rigid dummy. The pull-out shock and parachute-opening shock present a negative correlation. The strong dependence of parachute-opening shock on attitude angle and angular velocity of dummy indicates that there exists a advantageous parachute-opening area in phase plane.
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