Abstract
Vibration reduction of a flexible structure by controlling the stiffness of the supporting spring is described in this paper. The control is carried out based on the velocity feedback, and independent modal space control (IMSC) is used to calculate the spring stiffness taking into account the feedback of each mode. The spring with controllable stiffness is fabricated using a beam of rectangular cross section whose setting angle is controlled by the DC servomotor. The impulse response is investigated through numerical simulation and experiment, and the effectiveness of the control method is demonstrated.
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