Equilibrium Positions for UAV Flight by Dynamic Soaring
Dynamic soaring is a special flying technique designed to allow UAVs (unmanned aerial vehicles) to extract energy from wind gradient field and enable UAVs to increase the endurance. In order to figure out the energy-extraction mechanisms in dynamic soaring, a noninertial wind relative reference fram...
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| Format: | Article |
| Language: | English |
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Wiley
2015-01-01
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| Series: | International Journal of Aerospace Engineering |
| Online Access: | http://dx.doi.org/10.1155/2015/141906 |
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| author | Bingjie Zhu Zhongxi Hou Shangqiu Shan Xinzhu Wang |
| author_facet | Bingjie Zhu Zhongxi Hou Shangqiu Shan Xinzhu Wang |
| author_sort | Bingjie Zhu |
| collection | DOAJ |
| description | Dynamic soaring is a special flying technique designed to allow UAVs (unmanned aerial vehicles) to extract energy from wind gradient field and enable UAVs to increase the endurance. In order to figure out the energy-extraction mechanisms in dynamic soaring, a noninertial wind relative reference frame of aircraft is built. In the noninertial frame, there is an inertial force which is created by gradient wind field. When the wind gradient (GW) and the components of airspeed (vzvx) are positive, inertial force (F) makes positive work to the aircraft. In the meantime, an equilibrium position theory of dynamic soaring is proposed. At the equilibrium positions, the increased potential energy is greater than the wasted kinetic energy when the aircraft is flying upwards. The mechanical energy is increased in this way, and the aircraft can store energy for flight. According to the extreme value theory, contour line figures of the maximum function and the component of airspeed (vz) are obtained to find out the aircraft’s lifting balance allowance in dynamic soaring. Moreover, this equilibrium position theory can also help to conduct an aircraft to acquire energy from the environment constantly. |
| format | Article |
| id | doaj-art-c1ab3f5ebfd84ae2a6c0ed69676fff1c |
| institution | DOAJ |
| issn | 1687-5966 1687-5974 |
| language | English |
| publishDate | 2015-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | International Journal of Aerospace Engineering |
| spelling | doaj-art-c1ab3f5ebfd84ae2a6c0ed69676fff1c2025-08-20T03:23:30ZengWileyInternational Journal of Aerospace Engineering1687-59661687-59742015-01-01201510.1155/2015/141906141906Equilibrium Positions for UAV Flight by Dynamic SoaringBingjie Zhu0Zhongxi Hou1Shangqiu Shan2Xinzhu Wang3College of Aerospace Sciences and Engineering, National University of Defense Technology, Changsha, Hunan 410073, ChinaCollege of Aerospace Sciences and Engineering, National University of Defense Technology, Changsha, Hunan 410073, ChinaCollege of Aerospace Sciences and Engineering, National University of Defense Technology, Changsha, Hunan 410073, ChinaChongqing Key Laboratory of Heterogeneous Material Mechanics, Department of Engineering Mechanics, Postdoctoral Station of Mechanics, Chongqing University, Chongqing 400040, ChinaDynamic soaring is a special flying technique designed to allow UAVs (unmanned aerial vehicles) to extract energy from wind gradient field and enable UAVs to increase the endurance. In order to figure out the energy-extraction mechanisms in dynamic soaring, a noninertial wind relative reference frame of aircraft is built. In the noninertial frame, there is an inertial force which is created by gradient wind field. When the wind gradient (GW) and the components of airspeed (vzvx) are positive, inertial force (F) makes positive work to the aircraft. In the meantime, an equilibrium position theory of dynamic soaring is proposed. At the equilibrium positions, the increased potential energy is greater than the wasted kinetic energy when the aircraft is flying upwards. The mechanical energy is increased in this way, and the aircraft can store energy for flight. According to the extreme value theory, contour line figures of the maximum function and the component of airspeed (vz) are obtained to find out the aircraft’s lifting balance allowance in dynamic soaring. Moreover, this equilibrium position theory can also help to conduct an aircraft to acquire energy from the environment constantly.http://dx.doi.org/10.1155/2015/141906 |
| spellingShingle | Bingjie Zhu Zhongxi Hou Shangqiu Shan Xinzhu Wang Equilibrium Positions for UAV Flight by Dynamic Soaring International Journal of Aerospace Engineering |
| title | Equilibrium Positions for UAV Flight by Dynamic Soaring |
| title_full | Equilibrium Positions for UAV Flight by Dynamic Soaring |
| title_fullStr | Equilibrium Positions for UAV Flight by Dynamic Soaring |
| title_full_unstemmed | Equilibrium Positions for UAV Flight by Dynamic Soaring |
| title_short | Equilibrium Positions for UAV Flight by Dynamic Soaring |
| title_sort | equilibrium positions for uav flight by dynamic soaring |
| url | http://dx.doi.org/10.1155/2015/141906 |
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