This chapter highlights the mechanics of helicopter flight in terms of three aspects: trim, stability, and response. Helicopter vertical motion in hover is probably the simplest to analyze, but even simplifying approximations break down at higher frequencies and amplitudes, as unsteady aerodynamics, blade stall, and rotor dynamic effects alter the details of the motion considerably. The chapter presents the techniques for describing and analyzing trim and stability. Stability analysis requires linearization about a trim point and an examination of the eigenvalues and eigenvectors of the system. The chapter deals with linear, narrow range approximations that highlight how the various aerodynamic effects interact to shape the natural modes of helicopter motion. Helicopter flight dynamics has its share of essentially nonlinear phenomena including vortex‐ring state, main rotor wake‐tail rotor interactions, rotor stall, and rotor wake‐empennage interactions.
Modelling Helicopter Flight Dynamics: Trim and Stability Analysis
Helicopter Flight Dynamics ; 164-259
2018-11-12
97 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Helicopter control to trim in forward flight
TIBKAT | 1954
|Trim analysis of helicopter in forward flight based on CFD method
Online Contents | 2013
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