地面停放飞机局部温度环境研究

Research on local temperature environment of ground parking aircraft

确定地面停放飞机局部温度环境的变化规律是编制飞机结构局部环境谱和解决传感器"温漂"问题的关键工作。为此,开展了地面停放飞机局部温度实测工作,对不同舱室的温度变化规律进行了分析;基于模糊聚类的方法,根据局部温度的差异将飞机舱室划分为3类;选取结构系数和日照系数为关键参数,研究了环境温度对局部温度的影响规律;以百叶箱温度为自变量,建立了飞机局部温度模型;并通过统计方法确定了3类舱室温度模型关键参数的取值范围。研究结果表明:同一密闭状态下的不同飞机舱室可以有较大的温度差异;影响舱室温度的主要因素有日照、降雨以及舱室的结构形式和位置;实测温度与模型预测温度的对比证实了模型具有较高的精度。

Study on changing laws of local temperature environment of ground parking aircraft is a key work to compile local environment spectra and to solve the temperature drift problem of sensors.Therefore,the local temperature monitoring of ground parking aircraft is carried out and the changing laws of different bays are studied.Using the fuzzy clustering method,the bays of an airplane are divided into three groups according to the differences of local temperature.The effect laws of environmental temperature upon local temperature have been studied,and a local temperature model of aircraft is established using structural coefficient and sunlight coefficient as key coefficients,and the temperature of thermometer shelter as argument.Furthermore,ranges of key coefficients in the temperature model of three bay groups have been obtained through statistic method.The results show that bays of one sealing state can have large differences in temperature,and the factors which significantly affect bays＇ temperature are sunlight,rainfall,bays location and bays＇ structural form.A comparison of the monitored temperature and the predicted temperature using temperature model shows good agreement and proves that the temperature model possesses good accuracy.