Host: The Japan Society of Mechanical Engineers
Name : Dynamics and Design Conference 2019
Date : August 27, 2019 - August 30, 2019
This paper is concerned with active vibration control aiming at the minimization of vibrational energy of a flexible beam. The purpose of the paper is to present the methodology of designing the smart sensor in which the reduction of its output results in the minimization of the vibration energy. Firstly, this paper begins with the derivation of an ideal feedforward control law for minimizing the vibration energy. This is followed by the derivation of the control law for minimizing the smart sensor output. Next, shaping function of smart sensor such that the control law for minimizing the kinetic energy is coincident with that for minimizing the smart sensor output is numerically designed. Numerical simulation on adaptive feedforward control in conjunction with the desined smart sensor is finally conducted. It is found that if the disturbance is pure tone, the kinetic energy is minimized by the proposed method. On the other hand, if the disturbance is a white noise, the control effect deteriorates compared to the case of the sinusoidal disturbance. This is caused by instability of the ideal control law for minimizing the kinetic energy.
