Dynamic active impedance for vibration suppression of large space structures (Q1905812)

This paper approaches the control of large space structures by modulating the impedance of a joint to obtain desired vibration suppression. A dynamic active impedance controller is required and is proposed herein for this purpose. The method is applied to a flexible beam which is modelled by the Euler-Bernoulli equation. The boundary conditions for the beam are defined for a servomotor at one end and a free condition at the other end. The beam parameters are experimentally identified for the first three modes of vibration. Active impedances are determined separately for the rigid mode and the first three modes of vibration using a pole placement method.