NON-COLLOCATED ADAPTIVE-PASSIVE VIBRATION CONTROL

Presented in this paper is the development of a control law for tuning a variable stiffness vibration absorber to attenuate single frequency excitation in a non-collocated situation. The control law is comprise d of two distinct parts. First, a feedback controller is used to obtai n a +/-90 degrees phase condition between the motion of the vibration absorber mass and the location of interest. Next, a feedback based tun ing strategy is used to precisely tune the vibration absorber for perf ormance maximization. The feedback based tuning is based on the classi cal feedback structure of a regulating system and is used to tune the absorber such that the accelerometer voltage resulting from the measur ement of vibration of the point of interest is minimized. An experimen tal verification of this control law is shown. (C) 1997 Academic Press Limited.