scholarly journals Parameter identification for nonlinear damping coefficient from large-amplitude ship roll motion using wavelets

2017 ◽  
Vol 6 (2) ◽  
pp. 138-144 ◽  
Author(s):  
D. Sathyaseelan ◽  
G. Hariharan ◽  
K. Kannan
Keyword(s):  
Parameter Identification ◽  
Large Amplitude ◽  
Nonlinear Damping ◽  
Damping Coefficient ◽  
Roll Motion ◽  
Ship Roll ◽  
Ship Roll Motion

Concise Robust Control for Ship Roll Motion Using Active Fins

2011 ◽  
Vol 201-203 ◽  
pp. 2366-2374
Author(s):  
Wei Guan ◽  
Xian Ku Zhang
Keyword(s):  
Pid Controller ◽  
Nonlinear Damping ◽  
Roll Motion ◽  
Kutta Method ◽  
Loop Gain ◽  
Runge Kutta Method ◽  
Strong Robustness ◽  
Ship Roll ◽  
Linear And Nonlinear ◽  
Ship Roll Motion

This paper details the implementation of a robust PID fin control system designed by using close-loop gain shaping algorithm (CGSA) to stabilize the roll motion of a training ship “YUKUN”. Firstly, the effect of different representation of linear and nonlinear damping and restoring moment on the roll response is investigated. The solutions of different roll response equations are solved with the fourth order Runge-Kutta method. In the following, the design process of robust PID controller using CGSA is described and the controller designed has concise structure and strong robustness. The typical cases of ship operations are worked out and a roll reduction of 80%-85% is achieved in various simulation conditions.

scholarly journals Ship roll motion prediction based on ℓ1 regularized extreme learning machine

PLoS ONE ◽  
2018 ◽  
Vol 13 (10) ◽  
pp. e0206476 ◽  
Author(s):  
Binglei Guan ◽  
Wei Yang ◽  
Zhibin Wang ◽  
Yinggan Tang
Keyword(s):  
Extreme Learning Machine ◽  
Motion Prediction ◽  
Roll Motion ◽  
Ship Roll ◽  
Learning Machine ◽  
Ship Roll Motion
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