机载前下视激光雷达成像仿真  

Simulation for Airborne Laser Imaging with Front-downward View

作　　者：殷蔚明[1] 柳健[1] 田金文[1] 

机构地区：[1]华中科技大学电信工程系,湖北武汉430074

出　　处：《计算机仿真》2002年第4期14-18,共5页Computer Simulation

摘　　要：针对在成像噪声和载机运动影响下 ,前下视激光雷达对地面目标成像的仿真问题 ,分析并建立了成像过程的噪声模型 ;通过运用马尔科夫随机过程模型和独立同分布随机变量的叠加原理模拟载机运动状态和惯导姿态测量数据 ,对激光成像与地形高程进行映射变换 ;全面地给出了利用数字地图和导航系统测控精度生成测试用途激光像的仿真方案。实验显示 ,应用仿真系统提供的成像数据和映射变换关系 ,能对惯性 /激光雷达地形辅助导航系统进行有效的定位性能测试。成像仿真为惯性 /激光雷达系统的研究提供了必要的方案预研和仿真测试手段。With consideration of imaging noise and airborne movement, this paper studies simulation for airborne laser imaging with front-downward view and used to collect terrain information. At first, We make a model of imaging noise via analysis. Taking advantage of Markov's Model and the accumulating principle for independent casual variables with identical distribution, we imitate the airborne movement and the gesture data that measured by airborne inertial navigation system, then make transform between the laser image and the correspond terrain data. We also describe the simulation method in detail by which we can make laser image for test purposes from digital maps and the navigation system's measuring and controlling accuracy. The experimental result shows clearly that using with the image data and the relationship of transform provided by the simulation system, it is possible to effectively test the positioning capability of inertial/laser system. As a result, simulation for laser imaging provides a necessary tool for researchers to work out a plan or do simulation test on inertial/laser systems.

关 键 词：机载激光雷达 前下视成像 仿真 地形辅助导航 惯性导航 数字地图 

分 类 号：TN958.98[电子电信—信号与信息处理] TP391.9[电子电信—信息与通信工程]