This paper describes a new technique of an active control using air flow to suppress web flutter. In this technique, web flutter is suppressed actively and non-contact injection and suction air flow through another nozzle. This nozzle is composed of a speaker and a nozzle. Activating the speaker causes its internal diaphragm to vibrate, which allows for alternating air flow injection and suction. The distance to the web is adjusted by changing the angle, height, and horizontal position of another nozzle. The suppression performance is examined with changing arrangements of nozzle and the number of another nozzle. Moreover, control gain and phase of injection and suction air flow have an influence on the vibration suppression effect. A vibration control method using a single another nozzle is unable to suppress web flutter, instead, the web flutter grows. However, an improved vibration control method using double another nozzle is able to suppress web flutter.
Fukushima et al. (Wed,) studied this question.