机载光学大气数据系统数据反演精度分析  

Analysis of data inversion accuracy of airborne optical air data system

作　　者：李彬 雷宏杰[1] Li Bin;Lei Hongjie(Xi’an Flight Automatic Control Research Institute,AVIC,Xi’an 710065,China)

机构地区：[1]中国航空工业集团公司西安飞行自动控制研究所,陕西西安710065

出　　处：《红外与激光工程》2021年第8期208-213,共6页Infrared and Laser Engineering

摘　　要：通过分析误差传递规律,仿真分析了多波束激光反演三轴真空速、攻角及侧滑角的精度变化规律,并对反演精度变化规律进行了实验验证,实验与仿真结果吻合得较好。结果表明:三轴真空速反演精度随测量激光数目的增加而提高;x、y轴与z轴真空速精度随仰角变化具有不同的趋势,为保证三轴真空速反演精度小于2倍的测量精度,仰角取值范围应在20°~70°;角度反演精度与真空速、侧滑角的取值相关,与攻角取值无关,并随着真空速增大而提高;给定反演精度下,侧滑角的取值范围随着空速的增大而增大。文中的分析结论有助于光学大气数据测量系统的优化设计。The inversion accuracy of three-axis true air speed(TAS), angle of attack(AOA), angle of sideslipe(AOS) was analyzed by analyzing the error transmission rules of multi-beam laser measurement. In addition,experiments were carried out to verify the law of inversion accuracy change, and the experimental and simulation results were well consistent. The results show that the inversion accuracy of three-axis TAS are higher when the number of laser beams increase. The inversion accuracy of TAS in the x, y and z directions has different trends with the elevation angle. In order to ensure the three-axis TAS inversion accuracy less than 2 times the measurement accuracy, the elevation angle should be within the range of 20°-70°. The inversion accuracy of angle is related to the values of TAS and AOS rather than AOA, and it become higher as TAS increase. the range of AOS become larger as TAS increase when the inversion accuracy is given. The conclusions of this paper are useful for the optimal design of optical air data system(OADS).

关 键 词：光学大气数据系统 大气数据 数据反演法 反演精度 精度分析 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]