国防科技大学学报2025，Vol.47Issue(3)：232-238,7.DOI:10.11887/j.cn.202503024
脉冲式激光多普勒测速仪的理论与仿真分析
Theoretical and simulation analysis of the pulsed LDV
摘要
Abstract
Continuous-wave LDV(laser Doppler velocimeters)are limited in low-altitude velocity measurement due to factors such as the low power of continuous-wave lasers and optical system diffraction.By introducing the concept of"virtual distance"to expand the Feuilleté model,the time-domain echo signal model for pulsed LDV had been established.Simulation results indicate that pulsed LDV can perform velocity measurement through the accumulation of hard target echo signals.Pulsed LDV can also utilize longer laser pulse widths for detection without restricted by spatial resolution,the feasibility of high-precision velocity measurement using long pulses with pulsed LDV is verifies,laying a theoretical foundation for future experimental validation of the pulsed LDV.Pulsed LDV is capable of detecting echo signals scattered from targets at 5 km and beyond,significantly extending the working distance range of LDV.This makes LDV applicable in integrated navigation of low-altitude aircrafts and planetary surface landing navigation for spacecrafts,and other scenarios that require long-distance high-precision velocity measurement.关键词
激光多普勒测速仪/脉冲激光/低空测速/大气分层模型Key words
laser Doppler velocimeter/pulsed laser/low-altitude velocity measurement/Feuilleté mode分类
电子信息工程引用本文复制引用
陈兰剑,周健,金世龙..脉冲式激光多普勒测速仪的理论与仿真分析[J].国防科技大学学报,2025,47(3):232-238,7.基金项目
湖南省自然科学基金资助项目(2021JJ30782) （2021JJ30782）
