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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30~50Hz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。
The ground impact test was conducted on the rigid body and the soft body. The dynamic separation of the dummy heart from each other was separated by frequency and observation scale by wavelet method. The evolution of the chaotic characteristic parameters with wavelet observation scale was analyzed. The rigid body dummy was subjected to high-speed airdrop test, and the phase plane was used to analyze the correlation between dummy heart mass and attitude. The results show that the dynastic heartbeat fluctuation is concentrated in the frequency range of 30 ~ 50Hz, and the dummies have a good buffering effect on the high frequency oscillation. The high frequency details of the centroid dynamic loading are more random and the error amplification of high frequency interference Larger, the rigid body dummy drop test should extract the real dynamic load should be filtered out; high-speed airdrop test, the straightening dynamic load and open parachute load was significantly negative correlation, and the opening parachute and dummy pose There is a clear correlation between the angular and angular velocities, and an advantageous open area in the phase plane is obtained.