부제 : ABSTRACT Preface Variable-pitch propeller A design and production of the life-size variable-pitch propeller device Preliminary Experiment with Small Motor Thrust Identification with Full Motor Conclusions References
This paper deals with a vibration control system using propellers for crane load. Vibration suppression of crane load suspended by hoisting rope is an important issue to speed-up crane operation. In this study, a novel vibration control system using propeller thrust as control forces is presented. The pitch of the propeller can be varied so that the attack angle of the propeller blade possesses negative or positive. Changing the attack angle, the direction of thrust can be altered smoothly. Based on previous conceptual design, life-size experimental device was researched and developed. Its performance is investigated through control experiments.