船体振動のActive controlについて

概要

論文の詳細を見る
Vibration suppression by means of automatic control theory has been studied for flat plate and superstructure of ship, under the assumption that (i) the vibrating system is linear and time-invariant, (ii) control apparatus have capacity (i.e. control power and quick response) as sufficient as theory requests, and (iii) vibration information necessary to control is given through measurements and observers. The optimal control theory with state feedback is used and the effect of weighting parametre on the characteristics of controlled vibration is examined. Principal results are as follows. (i) In the system whose natural frequencies are very close, it is not so easy to control by single control force, but the control is possible by dual control forces. (ii) In the plate vibration where prominent modes are not necessarily discernible, building smaller vibratory system by truncating uninterested modes is not always possible because truncated mode makes adverse effect on transient characteristics if its frequency is close to adopted modes. (iii) In the superstructure vibration, usually superstrucutre-predominant modes exist. In this case building smaller system by extracting them is possible. (iv) In the tendon control of superstructure of 50ktdw tanker, 30〜100 tons of control force is necessary to keep the vibration below ISO's acceptable level.
社団法人日本船舶海洋工学会の論文
1991-09-04