115 Disturbance cancellation control and coupling vibration of an elastic supported cylinder and wake oscillator

Abstract

This paper studies disturbance cancellation control to suppress vortex-induced vibration of a circular cylinder in a cross flow. Fluctuating lift force acting on a vortex-induced cylinder is assumed as a disturbance. An observer was constructed to estimate the disturbance. Two different types of disturbance are assumed to describe the fluctuation of vortex shedding. One is a sinusoidal wave and the other is a wake oscillator represented by the van der Pol equation. Control performances of both types of disturbance model were examined by simulation and experiments.