摘要
针对飞行试验中狭小空间燃油箱氧浓度实时、精确测量需求,首先分析了目前飞行试验中应用的氧浓度测试系统存在的问题,提出基于TDLAS技术实现燃油箱氧浓度测试;其次,通过系统内部结构优化设计实现气液分离与小型化,最终体积较现有设备缩小了十倍以上,并采用波长调制技术与温度/压力补偿算法,提升系统在机载环境下的氧浓度检测能力;并通过地面及飞行试验,验证了系统的可靠性,最大测量误差为0.28%,达到机载氧浓度测量国际先进水平,为后续各型号惰化系统鉴定奠定基础。
According to the real-time and accurate measurement of oxygen concentration in narrow space during flight test,the existing problems of oxygen concentration measurement system used in flight test are analyzed firstly,TDLAS is proposed to measure the oxygen concentration of fuel tank.Secondly,the internal structure of the system is optimized to achieve gas-liquid separation and miniaturization.The final volume is more than ten times smaller than the existing equipment,and the wavelength modulation technology and temperature/pressure compensation algorithm are used to improve the oxygen concentration detection capability of the system in the airborne environment.Finally,the reliability of the system was verified through ground and flight tests.The maximum measurement error is 0.28%,reaching the international advanced level of airborne oxygen concentration measurement,laying the foundation for the subsequent identification of various types of inerting systems.
作者
李卢丹
姜宏伟
蒋红娜
Li Ludan;Jiang Hongwei;Jiang Hongna(Chinese Flight Test Establishment,Xi’an 710089,China)
出处
《电子测量技术》
北大核心
2023年第7期187-191,共5页
Electronic Measurement Technology
基金
国防科工局军工院所基础研究稳定支持计划(WD-2020-2)项目资助。
关键词
氧浓度测量
激光吸收光谱技术
飞行试验
oxygen concentration measurement
laser absorption spectrum counting
flight test
