This paper proposes a procedure to improve the accuracy of the light aircraft 6 DOF simulation model by implementing model tuning and aerodynamic database correction using flight test data. In this study, the full-scale flight testing of a 2-seater aircraft has been performed in specific longitudinal manoeuver for model enhancement and simulation validation purposes. The baseline simulation model database is constructed using multi-fidelity analysis methods such as wind tunnel (W/T) test, computational fluid dynamic (CFD) and empirical calculation. The enhancement process starts with identifying longitudinal equations of motion for sensitivity analysis, where the effect of crucial parameters is analysed and then adjusted using the model tuning technique. Next, the classical Maximum Likelihood (ML) estimation method is applied to calculate aerodynamic derivatives from flight test data, these parameters are utilised to correct the initial aerodynamic table. A simulation validation process is introduced to evaluate the accuracy of the enhanced 6 DOF simulation model. The presented results demonstrate that the applied enhancement procedure has improved the simulation accuracy in longitudinal motion. The discrepancy between the simulation and flight test response showed significant improvement, which satisfies the regulation tolerance.

中文翻译：

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使用纵向运动中的飞行试验数据增强轻型飞机 6 DOF 模拟

本文提出了一种通过使用飞行试验数据进行模型调整和气动数据库校正来提高轻型飞机6自由度仿真模型精度的程序。在这项研究中，为了模型增强和模拟验证目的，已经在特定的纵向机动中对 2 座飞机进行了全面飞行测试。基线仿真模型数据库采用风洞（W/T）试验、计算流体动力学（CFD）和经验计算等多保真分析方法构建。增强过程首先确定用于灵敏度分析的纵向运动方程，其中分析关键参数的影响，然后使用模型调整技术进行调整。下一个，经典的最大似然（ML）估计方法用于计算飞行试验数据的气动导数，这些参数用于校正初始气动表。引入了仿真验证过程来评估增强型 6 DOF 仿真模型的准确性。所呈现的结果表明，所应用的增强程序提高了纵向运动的模拟精度。模拟和飞行测试响应之间的差异显示出显着的改善，满足了规定的公差。所呈现的结果表明，所应用的增强程序提高了纵向运动的模拟精度。模拟和飞行测试响应之间的差异显示出显着的改善，满足了规定的公差。所呈现的结果表明，所应用的增强程序提高了纵向运动的模拟精度。模拟和飞行测试响应之间的差异显示出显着的改善，满足了规定的公差。