| 旋转飞行器动稳定导数获取原理 |
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| 作者姓名： | 傅建明 唐海敏 |
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| 作者单位： | 上海机电工程研究所，上海 201109 |
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| 摘 要： | 旋转飞行器具有独特的周期性非定常气动现象,其动态特性更加复杂,气流与旋转高度非定常关联,俯仰阻尼导数和Magnus力矩导数同等重要.文章从飞行器气动力建模的理论基础出发,考虑飞行器自转角速度非零的事实,将其作为基态影响参数,重新构建了旋转飞行器气动力数学表达式,并借鉴成熟的常规动导数强迫振动法,采用Fourier级数表征旋转影响,沿用旋转飞行器周期气动等效概念,建立了基于基态旋转流场的周期气动等效平均俯仰动稳定导数、纵向洗流时差导数和滚转动稳定导数获取的原理表达式,并设计了相应的运动模式,可供数值计算和风洞实验使用.
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| 关 键 词： | 旋转飞行器 动稳定导数 基态 运动模式 强迫振动法 |
| 收稿时间： | 2019-02-21 |
Principle of Acquiring Dynamic Stability Derivatives for Rolling Airframe Flying Vehicles |
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| Authors: | FU Jian-ming TANG Hai-min |
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| Affiliation: | Shanghai Electro-Mechanical Engineering Institute, Shanghai 201109, China |
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| Abstract: | The rolling airframe flying vehicle has a particular periodic unsteady aerodynamic feature. Its dynamic characteristics are more complicated, and unsteady correlativeness between the flow and rotation is more serious. The pitch damping derivative is as importent as the Magnus moment derivative. Based on the theoretical basis of aerodynamic modeling for flying vehicle, the present paper took into account the fact that the angular velocity of rolling airframe flying vehicles is non-zero, and reconstructed the aerodynamic mathematical expression of rolling airframe flying vehicles depending on the angular velocity of rolling as a basie flow state influence parameter. Based on the mature conventional dynamic derivative forced vibration methods, the periodic aerodynamic equivalent average pitching dynamic stability derivative, longitudinal wash-lagging derivative and rolling dynamic stability derivative were established using Fourier series to characterize the effect of rolling and the concept on periodic aerodynamic equivalent average of rolling airframe flying vehicles. Corresponding motion modes were designed for numerical calculations and wind tunnel tests. |
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| Keywords: | rolling airframe flying vehicle dynamic stability derivative basic flow state motion mode forced vibration method |
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