ADAPTIVE MODAL PARAMETERS IDENTIFICATION FOR COLLOCATED POSITION FEEDBACK VIBRATION CONTROL

The concept of position feedback previously introduced in the vibration suppression of large space structures is reviewed and extended. New results detailing more effective damping specifications are presented. Since effective vibration control depends on the accuracy of the modal parameters used, the problem of accurate identification of the modal frequencies, damping and mode shapes of the control modes is investigated. An adaptive estimation procedure to identify the parameters required in the position feedback control is proposed which caters for both full and partial modal state estimation. Simulation results for a multiple-degree-of-freedom vibration system are presented to illustrate the applicability of the proposed technique.