常规布局低速固定翼无人机的参数辨识

Parameter Identification of Low Speed Fixed Wing UAV with Conventional Layout

以固定翼飞行器为参考,运用气动参数建模分析的方法,建立空气动力学模型。运用xflr5计算程序构建出常规布局的小型低速固定翼无人机,提取飞行器相关的气动参数用于仿真实验,搭建固定翼无人机的仿真模型,通过Simulink进行飞行器仿真,记录相关实验数据并用于气动参数辨识程序的输入;采用最小二乘的方程误差法得出辨识参数,并对建模精度进行了分析。通过试验结果表明,利用辨识得到的气动参数仿真计算的飞行器状态与VLM得到的气动参数仿真实验结果吻合度较高,说明辨识程序可行,相关程序适用于常规布局的小型低速固定翼飞行器。

Using a fixed wing aircraft as a reference,establish an aerodynamic model using aerodynamic parameter modeling and analysis methods.Using the xflr5 calculation program to construct a small,low-speed fixed wing drone with a conventional layout,extracting aerodynamic parameters related to the aircraft for simulation experiments,building a simulation model of the fixed wing drone,conducting aircraft simulation through Simulink,recording relevant experimental data,and using it as input for the aerodynamic parameter identification program;The identification parameters were obtained using the least squares equation error method and the modeling accuracy was analyzed.The experimental results show that the aircraft state calculated by using the identified aerodynamic parameters is in good agreement with the aerodynamic parameter simulation experimental results obtained by VLM,indicating that the identification program is feasible and applicable to small,low-speed fixed wing aircraft with conventional layout.