非定常气动力辨识的模糊逻辑方法

提出了用内部函数和二次型隶属函数对非线性非定常气动力进行模糊逻辑建模与辨识的方法 ,分别用 F- 18和 F- 16飞机强迫振荡的实验数据建立了非线性非定常气动力模型 ,讨论了隶属函数导数的连续性对模糊逻辑模型精度的影响 ,并与已有的 Fourier模型和非线性代数模型进行了比较。结果表明 ,文中提出的建模方法能够给出更为满意的结果。

Fuzzy Logic Technique of Unsteady Aerodynamic Identification

A technique of fuzzy logic modeling and identification for nonlinear unsteady aerodynamics with internal function and quadratic membership function is presented. Nonlinear unsteady aerodynamic models are established by using the forced oscillation test data of F 18 and F 16 Fighters, the effect of membership function with or without continuous derivatives on accuracy of models is discussed, and the fuzzy logic model is compared with Fourier and nonlinear algebra models. The satisfactory results can be got by using the technique.