@article{oai:ir.kagoshima-u.ac.jp:00004851,
 author = {山中, 有一 and 松野, 保久 and 中山, 博},
 journal = {鹿児島大学水産学部紀要=Memoirs of Faculty of Fisheries Kagoshima University},
 month = {2016-10-28},
 note = {Theoretically, GM-Computer calculates the value of a ship's GM which is determined by the
free oscillation frequency obtained through F.F.T method, using the data got by an using
inclining detecting element, and accordingly navigator, under way, easily obtains the real time
GM.
However, when we made use of the GM-Computer, we came across a few practical
difficulties, because a lot of abnormal values of GM with large dispersion were recognized
when measurings were carried out on board the training ship, Kagoshima Maru, Faculty of
Fisheries, Kagoshima University.
Therefore, we discussed about the relationship between the accuracy of GM values and the
effect of external forces. In the result, we found that (1) the reliable GM values were obtained
when wind scale showed 4 grade, (2) there were no relationship between the GM value and wave
scale or swell scale.
And some improvement plans were examined in order to get the stable and reliable value of GM., 練習船かごしま丸によるGMコンピューターの実船試験を行い次の知見を得た。(1) 船内で異なる2点で同時測定を行ったが両者の差は小さく設置場所による影響は少ない。(2) GMcが正しいGMを表すためにはf_0が常にスペクトルのピーク値となることが前提であるが,今回の測定からはこの条件が成立するのは風力4前後の比較的狭い範囲であった。(3) 測定値に大きなバラツキがある場合でもf_0は変動が小さいため一定時間の頻度分布をとり最多頻度区間内のデータの平均値を求めればf_nによる誤表示を除去できる。},
 pages = {51--56},
 title = {GMコンピューターによるGM測定の信頼性について},
 volume = {37},
 year = {}
}