Numerical treatment of helicopter rotor stability problems

Vepa, R and Balasubramanian, TS (1980) Numerical treatment of helicopter rotor stability problems. In: Proceedings of the Aerospace Conference of Emerging technologies in Aerospace Structures, Design, Structural Dynamics and Materials, 13-15 Aug 1980, New York.

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Abstract

The problem of calculating the Floquet transition matrix for parametric stability problems is considered. A new method of calculating the transition matrix with a minimum number of time steps is described. The method is shown to be extremely efficient for a wide class of helicopter stability problems, including flapping stability of a helicopter rotor, helicopter ground resonance with a nonisotropic rotor and pitch-flap-bending stability of a helicopter rotor in forward flight. The relationship of the method to the classical method of averaging is pointed out.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Stability;Mathematical models;Helicopter rotors;Aerospace; Mathematical analysis;Helicopters;Aircraft components; Dynamics;Rotors;Aerodynamic stability;Aircraft stability; Floquet theorem;Helicopter performance;Numerical analysis; Rotary wings;Rotor aerodynamics;Dynamic response;Equations of motion;Ground resonance
Subjects: ENGINEERING > Structural Mechanics
Division/Department: Structures Division, Structures Division
Depositing User: M/S ICAST NAL
Date Deposited: 28 Nov 2006
Last Modified: 24 May 2010 09:53
URI: http://nal-ir.nal.res.in/id/eprint/3525

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