| 非定常气动力对飞行动力学特性影响分析 |
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| 引用本文： | 龚正,沈宏良,吴根兴.非定常气动力对飞行动力学特性影响分析[J].南京航空航天大学学报,2009,41(3). |
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| 作者姓名： | 龚正 沈宏良 吴根兴 |
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| 作者单位： | 南京航空航天大学航空宇航学院,南京,210016 |
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| 摘 要： | 在模糊逻辑非定常气动力建模的基础上,研究了非定常气动力对飞行动力学特性的影响.首先分析了非定常气动模型与定常气动模型的差别.其次采用分支分析方法,对带定常与非定常气动模型的飞行动力学系统的陡尾旋状态平衡分支图进行计算、比较与分析.并通过仿真对结果进行验证.研究表明,在大迎角状态下,非定常气动模型与定常气动模型存在较大的差别,对飞行动力学特性将产生一定的影响,需要在大迎角控制律设计中考虑非定常气动力的影响.
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| 关 键 词： | 模糊逻辑 气动建模 飞行仿真 非定常气动力 分支分析 |
Impact Analysis of Unsteady Aerodynamic Force on Flight Dynamics Characteristics |
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| Gong Zheng,Shen Hongliang,Wu Genxing.Impact Analysis of Unsteady Aerodynamic Force on Flight Dynamics Characteristics[J].Journal of Nanjing University of Aeronautics & Astronautics,2009,41(3). |
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| Authors: | Gong Zheng Shen Hongliang Wu Genxing |
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| Institution: | College of Aerospace Engineering;Nanjing University of Aeronautics & Astronautics;Nanjing;210016;China |
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| Abstract: | Based on the unsteady aerodynamic force modeling with the fuzzy logic method,this paper studies the impact of the unsteady aerodynamics force on the flight dynamics characteristics.Firstly,the differences between the unsteady and the steady aerodynamic models are illustrated.Secondly,with the method of the bifurcation analysis,the equilibrium bifurcation diagram of the flight dynamic system with steady/unsteady aerodynamic model is calculated,compared and analyzed.Conclusions are confirmed by the flight sim... |
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| Keywords: | fuzzy logic aerodynamic modeling flight simulation unsteady aerodynamics bifurcation analysis |
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