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This paper studies disturbance cancellation control to suppress vortex-induced vibration of a circular cylinder in a cross flow. The cylinder is supported by two pairs of elastic beams and electromagnets are used as control devices. Fluctuating lift force acting on a vortex-induced cylinder is assumed as a disturbance. An observer is 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 van der Pol equation. Simulation and experiments are carried out for the examination of the control performance.

nihon kikai gakkai ronbunshū. c

Disturbance Cancellation Control and Coupling Vibration of an Elastic Supported Cylinder and Wake Oscillator (Improvement of Control Simulation by Using van der Pol Wake Oscillator Model)