ON INFLUENCE OF KINEMATICS TO EQUIVALENT LINEAR DAMPING OF HELICOPTER BLADE HYDRAULIC DAMPER
An analytical model of hydraulic damper was presented in forward flight accounting for pitch/flap/lag kinematic coupling and its nonlinear force-velocity curve. The fourth order Runge-Kutta was applied to calculate the damper axial velocity in time domain. Fourier series based moving block analysis...
Saved in:
Published in | Applied mathematics and mechanics Vol. 23; no. 8; pp. 922 - 930 |
---|---|
Main Author | |
Format | Journal Article |
Language | English |
Published |
Institute of Aircraft Design and Research, Beijing University of,Aeronautics and Astronautics, Beijing 100083, P R China
01.08.2002
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | An analytical model of hydraulic damper was presented in forward flight accounting for pitch/flap/lag kinematic coupling and its nonlinear force-velocity curve. The fourth order Runge-Kutta was applied to calculate the damper axial velocity in time domain. Fourier series based moving block analysis was applied to calculate equivalent linear damping in terms of transient responses of damper axial velocity. Results indicate that equivalent linear damping will be significantly reduced if pitch/ flap/ lag kinematic coupling introduced for notional model and flight conditions. |
---|---|
Bibliography: | O322.11 V275.1 31-1650/O1 |
ISSN: | 0253-4827 1573-2754 |
DOI: | 10.1007/BF02437797 |