摘要
为了实现对机载移动目标的快速捕获和粗跟踪瞄准,设计了粗跟踪演示系统,完成了外场飞行实验的初步验证。本文系统利用GPS数据完成对目标的捕获,通过对姿态数据的校正,方位误差降到0.60°(1σ),俯仰误差降到0.40°(1σ),有效缩小了不确定区域;系统还对跟踪算法进行了优化改进,利用分段式函数等效非线性调整函数,有效解决动态目标跟踪时快速调整和超调之间的矛盾。飞行实验表明,本文的粗跟踪演示系统的捕获时间优于10s,粗跟踪精度优于480μrad,为精跟踪子系统实现最终的目标精确跟踪瞄准提供了有利条件,实验结果验证了该系统用于激光通信链路快速建立的可行性。
In order to realize the fast acquisition and coarse tracking of a moving object, a coarse APT demonstration system is designed for an unmanned aerial vehicle,and outdoor flight experiment s have been carried on to validate the system′s performance preliminarily.In the system,the fast acquisition is based on the calculation of the GPS coordinates.After correcting the attitude data,azimuth and elevation errors ar e reduced to 0.60° and 0.40° （1σ）, respectively.And consequently,the uncertain region becomes narrower efficientl y.For the sake of resolving the contradiction between the quick responsibility and the overshooting when trackin g the dynamic object,the proportion integration differentiation （PID） algorithm of the coarse tracking has also been ameliorated by introducing segmen ted functions to simulate the nonlinear adjustment function.In outdoor flight experiments,acquisition times are less than 10s,and residual coarse tracking errors are less than 480μrad,which provides favorable conditio ns for the fine tracking subsystem to achieve the final tracking accuracy.The results verify the feasibility of this s ystem to realize fast establishments of the laser communication links.
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2017年第5期510-518,共9页
Journal of Optoelectronics·Laser
基金
国家自然科学基金(11204220)
光电控制技术重点实验室和航空科学基金联合资助(201351S5002)资助项目
关键词
激光通信
快速捕获
GPS
粗跟踪
PID控制
非线性调整
laser communication
fast acquisition
GPS
coarse tracking
PID control
nonlinear adjust -ment
