一种适用锥头体的嵌入式大气数据传感系统改进校准算法

A Modified Calibration Algorithm for Cone Forebodies of Flush Airdata Sensing System

摘要:

嵌入式大气数据传感系统的空气动力学模型基于钝头体推导,该模型是否适用于锥头体尚未得到证实;对一典型锥头体进行了空气动力学模型适用性验证,验证结果表明该空气动力学模型用于锥头体时动静压相对误差超过了2.5%;对此,提出了一种适用于锥头体的改进校准算法,并且进行了仿真验证;仿真结果表明动静压相对误差小于0.5%,改进的校准算法有效消除了模型误差。

Abstract:

The aerodynamic model of Flush Airdata Sensing System is derived from blunt forebodies, but whether the model is suitable for cone forebodies does not be confirmed. The applicability of the aerodynamic model is verified for a typical cone forebody, and the verification results of the applicability demonstrate that the relative errors of the dynamic pressure and static pressure are more than 2.5% when the aerodynamic model is applied to cone forebody model. Therefore, a modified calibration algorithm for cone forebodies is proposed, and the corresponding validation of simulation is accomplished. Simulation results show that the relative errors of the dynamic pressure and static pressure are less than 0.5%, and the modified calibration algorithm eliminates the model errors effectively.