针对运载火箭主动飞行段,设计一种适用于球头双锥整流罩的嵌入式大气数据测量系统(flush air data sensing,FADS),并进行运载火箭FADS实施方案和求解精度研究。采用风洞试验手段对迎角误差、侧滑角误差以及形压系数进行标定,结果表明:F...针对运载火箭主动飞行段,设计一种适用于球头双锥整流罩的嵌入式大气数据测量系统(flush air data sensing,FADS),并进行运载火箭FADS实施方案和求解精度研究。采用风洞试验手段对迎角误差、侧滑角误差以及形压系数进行标定,结果表明:FADS在飞行Mach数0.4~5.0范围内能够较为准确辨识出实时风场参数变化,攻角、侧滑角测量绝对误差小于0.5°,Mach数测量绝对误差小于0.1,静压相对误差小于5%。嵌入式大气数据测量技术在运载火箭风场实时修正、飞行控制和主动减载等专业领域具有广泛的应用前景。展开更多
Horizontal winds in the mesosphere （80-100 km） were measured by meteor radar in Wuhan, China （30° N, 114° E） over a 45-month interval in 2002-2005 and the data examined to investigate the monthly mean be...Horizontal winds in the mesosphere （80-100 km） were measured by meteor radar in Wuhan, China （30° N, 114° E） over a 45-month interval in 2002-2005 and the data examined to investigate the monthly mean behavior of the Ol tide. A clear seasonal variation in amplitude of the O1 tide ranging from -0.3 m/s to 2.6 m/s was observed. In most months, the northward and eastward components differed by about 7 lunar hours with the eastward component leading. Comparison of the amplitudes of the M2 and O1 tides suggests the O1 tide is quite stronger over Wuhan, China. The amplitude ratio of the O1 tide to the M2 tide is quite stronger than that the gravitational potential being 0.41. The vertical wavelength of the O1 tide differs on a monthly basis. Height profiles of the O1 tide showed obvious height variation. The O1 tide is stronger in January and July. In different month, the vertical wavelength for the O1 tide changes considerably at the same height. The year＇s variation trend of the northward and eastward components is very similar in both phase and amplitude.展开更多
文摘针对运载火箭主动飞行段,设计一种适用于球头双锥整流罩的嵌入式大气数据测量系统(flush air data sensing,FADS),并进行运载火箭FADS实施方案和求解精度研究。采用风洞试验手段对迎角误差、侧滑角误差以及形压系数进行标定,结果表明:FADS在飞行Mach数0.4~5.0范围内能够较为准确辨识出实时风场参数变化,攻角、侧滑角测量绝对误差小于0.5°,Mach数测量绝对误差小于0.1,静压相对误差小于5%。嵌入式大气数据测量技术在运载火箭风场实时修正、飞行控制和主动减载等专业领域具有广泛的应用前景。
基金Acknowledgements This research was supported by National Natural Science Foundation of China （41104095）
文摘Horizontal winds in the mesosphere （80-100 km） were measured by meteor radar in Wuhan, China （30° N, 114° E） over a 45-month interval in 2002-2005 and the data examined to investigate the monthly mean behavior of the Ol tide. A clear seasonal variation in amplitude of the O1 tide ranging from -0.3 m/s to 2.6 m/s was observed. In most months, the northward and eastward components differed by about 7 lunar hours with the eastward component leading. Comparison of the amplitudes of the M2 and O1 tides suggests the O1 tide is quite stronger over Wuhan, China. The amplitude ratio of the O1 tide to the M2 tide is quite stronger than that the gravitational potential being 0.41. The vertical wavelength of the O1 tide differs on a monthly basis. Height profiles of the O1 tide showed obvious height variation. The O1 tide is stronger in January and July. In different month, the vertical wavelength for the O1 tide changes considerably at the same height. The year＇s variation trend of the northward and eastward components is very similar in both phase and amplitude.
