便携式空中目标仪激光重频的分析

应用科学学报 ›› 2006, Vol. 24 ›› Issue (2): 131-134.

便携式空中目标仪激光重频的分析

马建伟^1,2, 李朋¹, 盛安冬¹, 郭治¹

1. 南京理工大学自动化系, 江苏南京 210094;
2. 河南科技大学电信学院, 河南洛阳 471003

收稿日期:2004-10-30 修回日期:2004-12-21 出版日期:2006-03-31 发布日期:2006-03-31
作者简介:马建伟,博士生,研究方向:多指标PID控制、随机变结构控制、惯性导航与滤波等,E-mail:lymjw@163.com;郭治,教授,博导,研究方向:火力控制、期望性能指标集下的满意控制及估计,E-mail:guozhi@mail.njust.edu.cn
基金资助:
国家自然科学基金(60174028);"十五"预研兵器支撑基金(BZJ040202)资助项目

Laser Frequency Repetition Times in Portable Aerial Target Measurement

MA Jian-wei^1,2, LI Peng¹, SHENG An-dong¹, GUO Zhi¹

1. Department of Automation, Nanjing University of Science & Technology, Nanjing 210094, China;
2. College of Electronic Information Engineering, Henan University of Science & Technology, Luoyang 471003, China

Received:2004-10-30 Revised:2004-12-21 Online:2006-03-31 Published:2006-03-31

摘要/Abstract

摘要： 针对目标仪中激光重频次数的确定问题,对实际航迹数据进行分析.首先计算实际航迹信号的功率谱密度,得到航迹的频谱范围,依据Shannon定理初步确定激光重频值.进一步从建立航路的的预测误差要求出发,在匀速直线运动的假设下,使用该激光重频值,激光测距的预测误差方差能达到工程要求.然后给出该方差和建立航路允许的最大漏测点分布规律的对应关系.理论分析和工程实际表明,在保证跟踪精度的情况下,该激光重频值将满足回波率的技术指标要求.

关键词: 激光重频, 采样频率, 回波率, 功率谱密度

Abstract: The problem of laser frequency repetition (LFR) times in target distance measurement is studied.In analyzing flight path data, power spectral density is computed to obtain the frequency range and times of LFR using the Shannon theorem.Under the assumption of line movement with constant velocity, the flight path is built such that prediction error variance computed by the LFR times meets the specified requirements.Relation between error variance and the maximum allowed number of missing measurements is presented.It is proved both in theory and from practice that the LFR times can meet the performance specifications of laser echo rate while guaranteeing the tracking precision.

Key words: laser frequency repetition (LFR), power spectral density (PSD), laser echo rate, sampling frequency

中图分类号:

O231.1

马建伟, 李朋, 盛安冬, 郭治. 便携式空中目标仪激光重频的分析[J]. 应用科学学报, 2006, 24(2): 131-134.

MA Jian-wei, LI Peng, SHENG An-dong, GUO Zhi. Laser Frequency Repetition Times in Portable Aerial Target Measurement[J]. Journal of Applied Sciences, 2006, 24(2): 131-134.