大迎角非定常气动力建模方法研究

以战斗机俯仰机动为例,建立了飞机大迎角非定常气动力模型,包括非线性代数模型、Fourier函数分析模型、状态空间模型、差分方程模型以及模糊逻辑模型.并用SDM标模大振幅俯仰振荡非定常气动力风洞试验数据对模型参数进行了辨识,验证了模型的有效性.从模型物理意义、参数辨识难易程度及模型通用性和精确度等方面对几种非定常气动力模型进行了比较研究.

Comparative evaluation of unsteady aerodynamics modeling approaches at high angle of attack

Several unsteady aerodynamics mathematic models are modeled with account of fighter pitching maneuver including polynomial model,Fourier analysis model,state space model,difference equation model and fuzzy logic model.The model parameters are identified by wind tunnel test data of SDM.In the end of paper,it gives the differences about the mathematic models in the way of physical significance,applicability,precision and so on.