円筒形防振ゴムを利用した能動振動制御用油圧アクチュエータの開発

概要

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Hydraulic actuator for the active vibration control, which moved by shear deformation of cylindrical rubber vibration isolator used for bearing and piston, was developed. In this actuator, the installation by which piston rod receives radial force is possible, and high precision machining is not required. However, rubber deformation by pressure reduces actuator performance. In a test model actuator, deformation of rubber and performance of the actuator were examined experimentally and theoretically, and it was clarified that performance deterioration due to rubber deformation was smaller than 30% and that the actuator could operate over a frequency range from 0 to 500 Hz. Investigations of the actuator nonlinearities through experiments and simulations indicated that the first order component of Fourier series was linear. Finally, the developed hydraulic actuator was used for active vibration isolator of diesel engine of a ship, and it was proved that active vibration control was possible for the system equipped with nonlinear hydraulic actuator by using iterative harmonic control.
2000-03-25