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"Stability analysis of a free falling pararotor"^^ .
"The pararotor is a decelerator device based on the autorotation of a rotating wing. When it is dropped, it generates\r\nan aerodynamic force parallel to the main motion direction, acting as a decelerating force. In this paper, the\r\nrotational motion equations are shown for the vertical flight without any lateral wind component and some\r\nsimplifying assumptions are introduced to obtain analytic solutions of the motion. First, the equilibrium state is\r\nobtained as a function of the main parameters. Then the equilibrium stability is analyzed. The motion stability\r\ndepends on two nondimensional parameters, which contain geometric, inertia, and aerodynamic characteristics of\r\nthe device. Based on these two parameters a stability diagram can be defined. Some stability regions with different\r\ntypes of stability trajectories (nodes, spirals, focuses) can be identified for spinning motion around axes close to the major, minor, and intermediate principal axes. It is found that the blades contribute to stability in a case of spin around the intermediate principal inertia axis, which is otherwise unstable. Subsequently, the equations for\r\ndetermining the angles of nutation and spin of the body are obtained, thus defining the orientation of the body for a\r\nstationary motion and the parameters on which that position depends."^^ .
"2006" .
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"43" .
"4" .
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"AIAA"^^ .
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"Journal of Aircraft"^^ .
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"00218669" .
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"Angel Pedro"^^ .
"Sanz Andres"^^ .
"Angel Pedro Sanz Andres"^^ .
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"Vicente J."^^ .
"Nadal Mora"^^ .
"Vicente J. Nadal Mora"^^ .
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"Stability analysis of a free falling pararotor (PDF)"^^ .
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"ASA45_2.pdf"^^ .
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"Stability analysis of a free falling pararotor (Other)"^^ .
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"medium.jpg"^^ .
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"Stability analysis of a free falling pararotor (Other)"^^ .
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"indexcodes.txt"^^ .
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"Stability analysis of a free falling pararotor (Other)"^^ .
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"lightbox.jpg"^^ .
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"Stability analysis of a free falling pararotor (Other)"^^ .
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"preview.jpg"^^ .
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"Stability analysis of a free falling pararotor (Other)"^^ .
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