Design, Analysis And Test Of Smart Rotor Based On The High Effective Actuator

Vibration, noise, and compromises in aerodynamic design are primary barriers to improve the effectiveness of the helicopter. Vibration and noise reduction is focus all through the development of helicopter. The work of the present dissertation is the design and test of the smart rotor with active trailing edge, which is based on a push-pull double X-frame piezoelectric actuator.The smart rotor with active trailing edge is a new technique for vibration and noise reduction. In order to reduce the vibration and noise, the distribution of the high harmonic aerodynamic force of blades can be changed and the main harmonic force of rotor transferred to the fuselage is reduced by using a smart actuator to control the deflection of the trailing edge.The push-pull double X-frame actuator is a piezoelectric actuator based on the triangle magnification theory .The double X-frame can availably avoid the disadvantage of flexural displacement caused by leverage. Also, it's very compact and effective.In this paper, a smart rotor blade with double X-frame actuators is designed and the dynamic equations are deduced. The unsteady aerodynamics model of Leishman is used to calculate the unsteady aerodynamic force and to demonstrate the influence of the trailing edge on load distribution. The feasibility of this design is validated through bench and whirl tests. The output of the push-pull double X-frame actuator and the obtained deflection of the trailing edge are measured by using angular movement sensors in different frequencies and voltage.