Modal Analysis of 1/3-Scale Yak-54 Aircraft Through Simulation and Flight Testing
Modal Analysis of 1/3-Scale Yak-54 Aircraft Through Simulation and Flight Testing
复制标题
通过仿真和飞行测试对 1/3 比例 Yak-54 飞机进行模态分析
DOI：
10.2514/6.2011-6443
复制
发表时间：
2011
期刊：
影响因子：
--
通讯作者：
G. Garcia
中科院分区：
文献类型：
--
作者：
R. Lykins;S. Keshmiri;R. Riley;G. Garcia
本文比较了两种低保真度软件包在对 1/3 比例 Yak-54 遥控飞机进行建模时的准确性。高级飞机分析（AAA）和雅典娜涡格（AVL）两个程序被用来开发一套稳定性和控制导数以及后续的状态空间模型。使用 MathWorks System Identity Toolbox for MATLAB 分析飞行测试数据以执行模态分析。将识别结果与低保真度预测进行比较，并得出有关每个程序的优势的结论。根据此分析的结果，两个软件包都提供了类似的结果，但是，AVL 在预测纵向动力学方面稍微准确一些，因为短周期模式的固有频率和阻尼比估计与所有飞行条件下的飞行中看到的更接近。 AVL 还可以平均预测荷兰滚模式的固有频率，误差仅为 5%，而 AAA 可以更准确地预测荷兰滚模式的阻尼比。 AAA 在估计滚动模式的时间常数方面也稍微准确一些。
This paper compares the accuracy of two low fidelity software packages at modeling a 1/3 scale Yak-54 RC aircraft. Two programs, Advanced Aircraft Analysis(AAA) and Athena Vortex Lattice(AVL) were used to develop a set of stability and control derivatives and subsequent state space models. Flight test data was analyzed using MathWorks System Identification Toolbox for MATLAB to perform modal analysis. Results of identification are compared against low fidelity predictions and conclusions are drawn about the strengths of each program. Based on the results of this analysis both software packages provide similar results, however, AVL is slightly more accurate in predicting longitudinal dynamics as the natural frequency and damping ratio estimates of the short period mode more closely match that seen in flight for all flight conditions. AVL also predicts the natural frequency of the Dutch Roll mode on average with only 5% error, while AAA more accurately predicts the damping ratio of the Dutch Roll mode. AAA is also slightly more accurate at estimating the time constant for the Roll mode.