Sal, Firat

In this article, the influence of simultaneous variation in blade root chord length and blade taper on the flight control effort ofmaneuvering helicopter is researched. For this intention, helicopter models which are complex, control-oriented, physics-based modelsand capturing the main-physics and essential-dynamics are benefited. The influence of simultaneous variation in the blade root chordlength and blade taper (i.e., in both chordwise and lengthwise directions dependently) on the control effort of a maneuvering mannedhelicopter and also on the closed-loop responses are worked. Comparisons in terms of the control effort and peak-values with andwithout variations in the blade root chord and blade taper changes are followed. For helicopter control variance-constrained controllers(i.e. output variance-constrained controllers) are useful. Shortly, in also maneuvering flight conditions effects and benefits ofsimultaneous variation in blade root chord length and blade taper on the flight control effort is tried to be proved.

Oktay, Tugrul; Sal, Firat

In this study, the effect of simultaneous variation in blade root chord length and blade taper on the control effort of helicopter flight control system (i.e., FCS) of a helicopter is investigated. Therefore, helicopter models (i.e., complex, control-oriented, and physics-based models) including the main physics and essential dynamics are used. The effect of simultaneous variation in the blade root chord length and blade taper (i.e., in both chordwise and lengthwise directions dependently) on the control effort of an FCS of a helicopter and also on the closed-loop responses is studied. Comparisons in terms of the control effort and peak values with and without variations in the blade root chord and blade taper changes are carried out. For helicopter FCS variance-constrained controllers, specific output variance-constrained controllers are beneficial.