Vibration reduction of offshore structures via output feedback H ∞ tracking control

This paper deals with output feedback tracking H ∞ control problem for an offshore structure subject to irregular wave forces. In the offshore structure under consideration, an active mass damper is installed at the top of the offshore structure to suppress the vibration of the system. Based on an uncertain dynamic model of the offshore structure, a robust output feedback H ∞ tracking controller is proposed to attenuate the wave-induced vibration of the offshore. Simulation examples are provided to demonstrate effectiveness and superiority of the proposed active control schemes.