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Volume 41 Issue 1
Jan.  2015
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Journal of Beijing University of Aeronautics and Astronautics  > 2015  >  41(1): 133-140.
XU Na, SUN Mao. Dynamic flight stability of a model dronefly in hovering and forward flight[J]. Journal of Beijing University of Aeronautics and Astronautics, 2015, 41(1): 133-140. doi: 10.13700/j.bh.1001-5965.2014.0069(in Chinese)
Citation: XU Na, SUN Mao. Dynamic flight stability of a model dronefly in hovering and forward flight[J]. Journal of Beijing University of Aeronautics and Astronautics, 2015, 41(1): 133-140. doi: 10.13700/j.bh.1001-5965.2014.0069(in Chinese)
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Dynamic flight stability of a model dronefly in hovering and forward flight

doi: 10.13700/j.bh.1001-5965.2014.0069

  • School of Aeronautic Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China

  • Received Date: 24 Feb 2014
  • Publish Date: 20 Jan 2015
    Abstract
  • Insects usually keep hovering or forward flight. Thus the dynamic stability of the two types of flight is significant to study the insect flight. The dynamic flight stability of a model dronefly in hovering and forward flight was studied. On the basis of an averaged model and the small disturbance theory, the linearized equations of longitudinal and lateral motion were given. The method of computational fluid dynamics was used to compute the aerodynamic derivatives and the eigenvalue and eigenvector analysis was applied to solve the equations of motion. The experiment results reveal that at hovering, the longitudinal and lateral disturbed motion both includes the unstable mode, therefore hovering is unstable. At forward flight, for the longitudinal motion, the time for initial disturbances to double for the unstable mode is decreasing, and the instability of the longitudinal motion is increasing; the instability of the lateral motion decreases to a weakly or neutrally stable mode. The forward flight of dronefly is unstable.

     

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