基于动态时间规整的火箭尾喷焰识别仿真

通过分析火箭尾喷焰的红外辐射特性,总结了辐射强度序列的变化规律,提出—种改进的基于动态时间规整(dynamic time warping,DTW)的识别算法.为了提高序列形状相似性度量的效果,使用导数序列计算距离矩阵和匹配路径,依据匹配路径和辐射强度值重新计算距离;采用首尾松弛因子,在一定程度上解决了观测序列长度的不统...

Simulation of Rocket Exhaust Plumes Recognition Based on Dynamic Time Warping

By analyzing the infrared radiation characteristics of the rocket exhaust plumes and summarizing the changing law of the radiant intensity sequence, an improved recognition algorithm based on Dynamic Time Warping algorithm is proposed. In order to improve the effect of sequence shape similarity measurement, the distance matrix and matching path are calculated by the derivative sequence, and the distance is recalculated according to the matching path and radiant intensity value. The problem of path matching affected by the non-uniformity of observation sequence length is solved to a certain extent by using the prefix and suffix relaxation factors. The simulation results show that the algorithm can better match the infrared radiant intensity sequence of exhaust plumes of the same rocket, and realize the classification or recognition of rockets with a small number of samples.