摘要
惯性导航系统实际工作时,环境温度变化会导致IMU的惯性器件加速度计的工作温度变化,其零偏和标度因子因此也会发生变化,最终影响惯性导航系统的初始对准和导航精度。通过两级温度控制,在水平和垂直位置对加速度计进行定点升温试验,利用最小二乘法建立起了加速度计的温度补偿模型。在自然升温和降温过程中,进行加速度计的温度补偿,验证了模型的准确性和重复性。
During the operation of Inertial Navigation Systems （INS）, the bias and scale factors of accelerometers would be changed with the ambient temperature. In order to ensure the precision of initial alignment and navigation, fixed-point temperature-rising tests were made for the accelerometer ensembles at horizontal and vertical position. Through two-level temperature control, the inner temperature was increased to different fixed-point temperature. The model of acceleration＇s temperature compensation was established using the least square method. The compensation results of the output of accelerometers undergoing warming-up and cooling-down process show the accuracy and repeatability of the obtained temperature model.
出处
《中国惯性技术学报》
EI
CSCD
北大核心
2009年第4期479-482,共4页
Journal of Chinese Inertial Technology
基金
国防科技预研项目(51309020502)
