A parametric study of fixed-wing aircraft perching maneuvers

D. M.K.K. Venkateswara Rao, Hui Tang, Tiauw Hiong Go

Research output: Journal article publicationJournal articleAcademic researchpeer-review

12 Citations (Scopus)

Abstract

This paper presents atrajectory optimization-based study for identifying the influencesof different fixed-wing aircraft parameters on perching maneuvers. Perching trajectories, which involve climbing for landing with a near-zero speed, are optimized to minimize the unwanted altitude gain, herewith referred to as undershoot. Undershoot has a complex relationshipnot only with the control inputs, but also with the aircraft geometry and features, such as stability characteristics, controllability, and thrust available. Tofacilitate this parametric study, anaerodynamic modeling tool is developed, which combines a nonlinear vortex correction method with the Leishman's state-space form of Wagner's unsteady model. This tool is used for in-flight aerodynamics evaluation during the optimization of the perching maneuvers. The perching solutions - minimum undershoot and trajectory length - are then computed, andthe effects of key parameters of the maneuver are studied. Itis found that a high aspect ratio, high thrust available, optimal placement of the center of gravity, relaxed terminal velocity constraints, low zero-lift drag, and headwind reduce the spatial requirements for the maneuver. Furthermore, it is confirmed that a high angle-of-attack maneuver is not critical for very low speed perching.
Original languageEnglish
Pages (from-to)459-469
Number of pages11
JournalAerospace Science and Technology
Volume42
DOIs
Publication statusPublished - 1 Jan 2015

Keywords

  • Aerodynamic modeling
  • Aircraft perching
  • Nonlinear vortex correction method
  • Parametric study
  • Trajectory optimization

ASJC Scopus subject areas

  • Aerospace Engineering

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