Abstract
This paper deals with an active control to suppress a flow-induced web flutter by multi-point and non-contact control devices using pressure wave. A flexible web, as a controlled object, is supported at one end and subjected to fluid flow in the passage. The flutter occurs to the web due to the fluid flow with a self-excited feedback mechanism resulting from fluid-structure interaction. The web flutter is suppressed by the active control using the pressure wave from loudspeakers. The loudspeakers are driven with changing a controller gain and phase-shift between the displacement of the web and the pressure. As a result, it is shown that the web flutter is effectively suppressed by the proposed method of multi-point non-contact control.
