핀 스태빌라이저의 예측제어기

Abstract

Predictive control algorithm can be the solution of the disturbance dominant problem like the roll stabilization of a ship in waves. In this paper, the predictive control algorithm was developed for fin stabilizer. Future wave induced moment was simply modeled by the two typical regular wave components of which six parameters are identified by the recursive Fourier transform and the least squares method using the recent time series of the roll motion. After predicting the future wave induced moment, optimal control theory was applied to find out the most effective command fin angle to stabilize the roll motion. As the results, wave prediction performance was investigated, and the effectiveness of the predictive control algorithm was compared to the conventional PD controller.