AN IMPEDANCE SYNTHESISING ARRANGEMENT, AN IMPROVED VIBRATIONAL DAMPING APPARATUS AND A METHOD FOR DERIVING A DIGITAL SIGNAL PROCESSING ALGORITHM

摘要

A vibrational damping apparatus (20) with piezoelectric component (21) is engaged with a structure (22) which is to be vibrationally damped. The piezoelectric component (21) has a pair of electrical terminals (23) and (24) for communication of a voltage across the piezoelectric material. The impedance synthesizing arrangement (25) may include an analog or digital means (26) for implementing a transfer function. The predefined relationship provided by the transfer function is adapted to synthesize a circuit for passive shunting of the piezoelectric material (21). The terminals (23, 24) of the piezoelectric component (21) are electrically connected to the impedance synthesizing arrangement (25) such that input voltage (11) is provide by the piezoelectric material (21) in response to vibration of the structure (22) and the output current (12) is fed to piezoelectric material (21) so as to vibrationally damp the structure.