Volume 36, Number 2, April 2018
|211 - 219
|03 July 2018
Multivariate Splines-Based Asymmetric Aerodynamic Modeling of Morphing Aircraft
School Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China
2 Experimental Aircraft Design and Flight Testing Lab of Shaanxi, Xi'an 710072, China
The aerodynamic parameters of morphing aircraft can vary significantly in the morphing process; the aerodynamic data model is complex and high-order nonlinear. This paper presents a new method of aerodynamic modeling of morphing aircraft by using multivariate splines. Firstly, the aerodynamic coefficient model of morphing aircraft based on the multivariate splines model structure is presented. This model can describe symmetric and asymmetric aerodynamic forces. Then, the multivariate simple splines estimation process is introduced in detail and the concrete formulation is deduced. Finally, the final model structure is determined by error analysis, and the aerodynamic parameter polynomial model in the global coordinate system is obtained by coordinate transformation. The results show that this method can accurately describe the aerodynamic model of morphing aircraft during arbitrary symmetric and asymmetric morphing process without predicting the specific model structure of the aerodynamic parameters related to varying process.
Key words: morphing aircraft / multivariate splines / modeling / asymmetric morphing / polynomials / parameter estimation
关键字 : 变体飞机 / 多元样条函数 / 建模 / 非对称变形 / 多项式 / 参数估计
© 2018 Journal of Northwestern Polytechnical University. All rights reserved.
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