Helicopter Rotor Infield Tracking with a Trailing-edge Flap and Adaptive Closed-loop Regulator

This paper investigates a utility helicopter rotor infield tracking and vibration control design. A Discrete Trailingedge Flap (DTEF) is employed as an actuation appliance to correct the unbalance. A rotor model with trailingedge flap is developed using Dymore - a multibody dynamic code. Two dissimilar rotors are modeled to simulate unbalanced inertia force and unbalanced aerodynamic force situations respectively. An adaptive closed-loop regulator is introduced and applied in both working conditions. Infield tracking is then conducted and control corrections are made according to different dynamics. Control process is presented and analyzed in advance ration u=0.233 in terms of controller inputs and outputs. Infield tracking and control correction at varying advance ratio is conducted in the following step and results are presented and explained.