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论文:2013,Vol:31,Issue(6):858-864 |
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引用本文： |
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李满, 宋笔锋, 焦景山, 胡铁玉. 基于柔性梁模型的大展弦比无人机动力学建模与分析[J]. 西北工业大学 |
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Li Man, Song Bifeng, Jiao Jingshan, Hu Tieyu. Flight Dynamics Modeling and Analysis of High Aspect Ratio UAV Based on Flexible Beam Model[J]. Northwestern polytechnical university |
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| 基于柔性梁模型的大展弦比无人机动力学建模与分析 |
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| 李满1, 宋笔锋1, 焦景山2, 胡铁玉2 |
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1. 西北工业大学 航空学院, 陕西 西安 710072;
2. 空军航空大学 航空理论系, 吉林 长春 130022 |
| 摘要: |
| 高空长航时大展弦比无人机机翼结构刚度小,在飞行中变形幅度大且特征频率低,与无人机飞行动力学响应耦合,改变了无人机的飞行动力学特性。为研究其影响,对大展弦比机翼结构进行空间梁假设,利用Hodges本征梁动力学模型,结合大展弦比气动力片条理论和准定常假设对无人机进行建模,计算配平状态下无人机的静变形。机翼柔性改变了无人机的纵向静稳定性,在不同推力分布下,计算并比较柔性无人机纵向静稳定性变化。计算不同飞行高度、结构刚度和有效载荷挂载情形下的无人机的纵向飞行品质,结果显示由于静弹性变形改变无人机配平状态下的俯仰转动惯量,导致无人机的纵向短周期频率减小,阻尼增大。由于机翼柔性的影响,无人机纵向长周期运动与结构弯曲变形运动发生耦合。 |
| 关键词:
大展弦比无人机
柔性机翼
气动弹性
静稳定性
飞行动力学
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| Flight Dynamics Modeling and Analysis of High Aspect Ratio UAV Based on Flexible Beam Model |
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| Li Man1, Song Bifeng1, Jiao Jingshan2, Hu Tieyu2 |
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1. College of Aeronautics, Northwestern Polytechnical University, Xi' an 710072, China;
2. Department of Aeronautics Theory, Air Force Aviation University, Changchun 130022, China |
| Abstract: |
| The high aspect ratio wing of the High Altitude Long Endurance (HALE) UAV is flexible, causing the UAV to have large structural deformation.Adopting the spatial beam assumption of the high aspect ratio wing, this paper studies the flight dynamics of the UAV uses Hodges intrinsic beam dynamics model combined with aerody -namic strip theory and quasi-steady assumption, uses this method, computes the static deformation in trim state, analyzes the stability in different thrust distribution, calculates the flying qualities in different altitudes, structural rigidities and payload distributions.The results and their analysis show preliminarily that:(1) the flexible high as-pect ratio wing changes the longitudinal static stability and the pitch inertia of the UAV, resulting in decreased short cycle frequency and increased damping;(2) the phugoid motion couples with structure bending motion. |
| Key words:
aeroelastisity
aspect ratio
damping
flexible wings
flight dynamics
eigenvalues and eigenfunctions
mathematical models
matrix algebra
schematic diagrams
stability
stiffness matrix
unmanned aerial vehicles(UAV)
velocity
HALE(High Altitude Long Endurance) UAV
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| 收稿日期: 2013-03-11
修回日期:
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| DOI: |
| 通讯作者:
Email： |
| 作者简介: 李满(1977-),西北工业大学博士研究生,主要从事无人机可靠性与性能的研究。
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参考文献: |
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[1] Dewey H Hodges. A Mixed Variational Formulation Based on Exact Intrinsic Equations for Dynamics of Moving Beams. Journal of Solids and Structures, 1990, 26: 1253-1273
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