22nd Congress of International Council of the Aeronautical Sciences, Harrogate, UK, 28 August - 1st September, 2000
Paper ICAS 2000-4.9.R2

DEVELOPMENT AND TESTING OF AN ADAPTIVE ROTOR SYSTEM BASED ON SOLID ACTUATION AND NON CONTACT SIGNAL TRANSMISSION TECHNOLOGY

Y. Chen (1), B. Tao (1), W. Gao (2), R. Chen (2), Z. Gu (3)
(1) National Engineering Research Center of Turbo-generator Vibration, Southeast University, Nanjing, PRC; (2) The Aeronautical Lab for Smart Materials & Structures, Nanjing University of Aeronautics and Astronautics, Nanjing, PRC (3) National Lab of Rotor Aerodynamics, Nanjing University of Aeronautics and Astronautics, Nanjing, PRC

Keywords: adaptive rotor, solid actuator, signal transmission, active flap control

In this paper, an adaptive rotor system based on solid actuation and non-contact signal transmission technology is investigated. The solid actuation system consists of an electrostrictive stack actuator, and a mechanism to amplify the displacement of the actuator. A theoretical model is used to predict the frequency response of the stack actuator. A noncontact signal transmission device is designed to transfer the multiple testing and controlling signals between the fuselage and the rotating rotors, so as to minimize the maintenance work. In close loop experiments, an adaptive algorithm is adopted to suppress the vibratory load of the blades by ground effect in hovering test. A special sensor is designed to provide reference signal to ensure the stability of the algorithm. Experimental results show that the vibration can be suppressed effectively.

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