摘要
主要利用滤波器、离散傅里叶变换、以及统计信号处理方法等对实验室模拟的尾流信号进行分析和处理、计算.从能量的角度来看,光学信号在有无气泡幕情况下的区别是非常明显的;利用滤波器只能作为尾流光学信号的预处理,从实际应用来看,需要做进一步处理;离散傅里叶变换对不同气压下得到的处理结果存在的区别,必然也为判断不同航速、不同尾龄下的尾流提供了一种线索;以Chirpz变换的形式对尾流光学信号进行处理,使得这种分布具有相当直观的图形,结合适当的图形处理方式,将有可能确定探测尾流光学性质的特征信号.
The optical signals of wakes stimulated in laboratory are analyzed and calculated mainly by using MATLAB tools of filter, disperse Fourier transformation （DFT）, and statistic semaphore managing etc. The optical semaphores with and without bubble film are much different on the point of energy. Filter can only be used to manage the signals as pretreatment which needs to be treated more in order to practice. Results of DFT under various pressures are different that provide a clew for estimating wakes of different speed and age. By Chirp z transformation, which can provide visual graphs and a proper way to manage graphs,it is possible to confirm the characteristic of optical signals for detecting ship wakes.
出处
《光子学报》
EI
CAS
CSCD
北大核心
2005年第8期1274-1277,共4页
Acta Photonica Sinica
基金
武器装备预研基金项目(编号:51448030101ZK1801)
