Fin stabilizer is a kind of active stabilizer , which is designed on the principle of torque counteraction . fin stabilizer applied at present is an angle feedback system which calculate the controlling torque through the fin angle . because the relationship between the lift produced by fin and the fin angle is mainly determined by the hydrodynamic experiment , so there are some defects 目前使用的減搖鰭是一個(gè)角度反饋系統(tǒng),它通過鰭的轉(zhuǎn)角來計(jì)算控制力矩,這樣就存在一些不足之處,因?yàn)轹捝袭a(chǎn)生的升力和鰭角的對(duì)應(yīng)關(guān)系主要靠鰭模的水動(dòng)力試驗(yàn)來求得。