Longitudinal Aerodynamic and Stability Characteristics of High-Aspect-Ratio Unmanned Aerial Vehicles in Gust Response
| Autor: | Bolin Feng, Qinghe Zhao, Wensheng Zhang, Junli Wang, Zhigui Ren |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
0209 industrial biotechnology
Computer simulation lcsh:T Computer science lcsh:Motor vehicles. Aeronautics. Astronautics Work (physics) Longitudinal static stability High-aspect-ratio UAVs Gust response Aerospace Engineering 02 engineering and technology Aerodynamics Numerical simulation Grid lcsh:Technology 01 natural sciences Stability (probability) 010305 fluids & plasmas Aerodynamic force 020901 industrial engineering & automation Longitudinal stability characteristics Control theory Range (aeronautics) 0103 physical sciences lcsh:TL1-4050 |
| Zdroj: | Journal of Aerospace Technology and Management v.11 2019 Journal of Aerospace Technology and Management Departamento de Ciência e Tecnologia Aeroespacial (DCTA) instacron:DCTA Journal of Aerospace Technology and Management, Volume: 11, Article number: e2719, Published: 03 JUN 2019 Journal of Aerospace Technology and Management, Vol 11, Iss 1, Pp 2719-2719 (2019) |
| Popis: | The aim of this work is to propose an accurate and reliable numerical simulation method of gust response, so as to analyze longitudinal stability characteristics of high-aspect-ratio unmanned aerial vehicles (UAVs) under gust response. Based on the dual-time stepping method, the unsteady Navies-Stokes equation was solved. By introducing grid velocity to study the effects of gust, the numerical simulation of gust response was realized. Moreover, the numerical simulation method was verified to be accurate by using the theoretical value and reference value obtained in previous research. The calculation results of the high-aspect-ratio UAV under the 1-cos gust reveal that longitudinal aerodynamic forces of high-aspect-ratio UAVs changed. In the whole range of gust gradient length, the UAVs were always in the state of static stability. However, with the increase of gust velocity, static stability margin decreased. The numerical simulation method of gusts established in this study preferably overcomes the possible numerical oscillations and divergence problems caused by excessive gust velocity. The analysis on longitudinal static stability and stability margin of high-aspect-ratio UAVs under the effects of gusts can ensure flight quality and safety of UAVs under the effects of gusts. |
| Databáze: | OpenAIRE |
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