Numerical simulation of pararotor dynamics: Effect of mass displacement from blade plane

Piechocki, Joaquín and Nadal Mora, Vicente and Sanz Andres, Angel Pedro (2016). Numerical simulation of pararotor dynamics: Effect of mass displacement from blade plane. "Aerospace Science and Technology", v. 55 ; pp. 400-408. ISSN 1270-9638. https://doi.org/10.1016/j.ast.2016.04.004.

Description

Title: Numerical simulation of pararotor dynamics: Effect of mass displacement from blade plane
Author/s:
  • Piechocki, Joaquín
  • Nadal Mora, Vicente
  • Sanz Andres, Angel Pedro
Item Type: Article
Título de Revista/Publicación: Aerospace Science and Technology
Date: August 2016
ISSN: 1270-9638
Volume: 55
Subjects:
Freetext Keywords: Decelerator; Numerical simulation; Rotary wing
Faculty: E.T.S. de Ingeniería Aeronáutica y del Espacio (UPM)
Department: Aeronaves y Vehículos Espaciales
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

The pararotor is a biology-inspired decelerator device based on the autorotation of a rotary wing, whose main purpose is to guide a load descent into a certain planetary atmosphere. This paper focuses on a practical approach to the general dynamic stability of a pararotor whose center of mass is displaced from the blade plane. The numerical simulation tool developed is based upon the motion equations of pararotor flight, utilizing a number of simplifying hypotheses that allow the most influencing factors on flight behavior to be determined. Several simulated cases are analyzed to study the effect of different parameters associated with the pararotor configuration on flight dynamics, particularly the center of mass displacement from the blade plane. It was confirmed that the ability to reach stability conditions depends mainly on a limited number of parameters associated with the pararotor configuration: the relationship between principal moments of inertia, the planform shape (associated with blade aerodynamic coefficients and blade area) and the vertical distance between the center of mass and the blade plane. As a result different types of equilibrium solutions are found and the effect of each parameter is characterized. A bifurcation in the stability shape to a precessing conical rotation, not previously found in the linear stability analysis, is predicted by this numerical model.

More information

Item ID: 48087
DC Identifier: https://oa.upm.es/48087/
OAI Identifier: oai:oa.upm.es:48087
DOI: 10.1016/j.ast.2016.04.004
Official URL: https://www.sciencedirect.com/science/article/pii/S1270963816301328
Deposited by: Memoria Investigacion
Deposited on: 02 Feb 2018 13:15
Last Modified: 02 Feb 2018 13:15
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