Modal Pole Placement for Coupled Structural Acoustic System Based on Reduced Order Model

The problem of modal pole assignment of a coupled structural acoustic system based on reduced order model from the forced responses is addressed. The reduced order model might be obtained entirely from measured vibration data, there being no need to determine or to know the structural matrices and the acoustic impedance matrix. The modal natural frequencies and damping ratios of the coupled system are assigned separately and simultaneously using output feedback control by collocated actuator-sensor arrangements. Different control configurations are discussed and active structural acoustic control is demonstrated numerically using a fluid-loaded plate. The numerical examples show that the chosen eigenvalues may be assigned to predetermined values. © 2017, Editorial Board of Journal of Ship Mechanics. All right reserved.