摘要
本文针对发动机尾喷焰的目标红外特性开展谱分析研究。采用热流法求解辐射传输方程,获得尾喷焰表观红外辐射特性仿真数据,应用多尺度小波分解红外光谱获得小波压缩系数。考察了不同小波函数及小波尺度下红外特性光谱的压缩效果。研究结果表明,基于小波的尾喷焰红外辐射特性光谱数据压缩方法是可行的,尾喷焰红外光谱主要信息基本保留,变量维数压缩可达10倍以上。
In this paper, the spectral analysis has been performed on the infrared radiation character- istics of engine exhaust plume. The simulating data of the apparent infrared radiative characteristics of exhaust plume is gained, by solving radiative transfer equation using flux method, and the wavelet co- efficients are approached by multi-scale wavelet decomposition. Compression effectiveness by different wavelet functions and scales is investigated. Result shows that the wavelet method for compressing the infrared radiation spectrums of exhaust plume is feasible. The compression rate of variable dimension can be less than one-tenth meanwhile the diagnostic information of spectrum are preserved.
出处
《工程热物理学报》
EI
CAS
CSCD
北大核心
2008年第1期127-129,共3页
Journal of Engineering Thermophysics
基金
航天支撑基金
武器装备预研基金(No．9140A01060106HT0125)
关键词
尾喷焰
红外特性
数据压缩
小波变换
exhaust plume
infrared characteristic
data compression
wavelet transform
