Simulink Of A Ship Roll Motion And Study Of Fin Stabilizer's Control System

Fin stabilizer is one of the most effective ship-stabilized equipment. In recent years, the computer technology and intellective control theory have developed quickly. In order to improving effect of the system of fin stabilizer. A series of studies have done to design some effective and intelligent fin stabilizer.The dissertation consists of four modules. One is the characters of random sea wave and program of carrying out it. One is the characters of linear model of ship roll motion and program of carrying it. One is the theory of steady of ship roll motion and the equipment for it. Last one is the control system of fin stabilizer and the style of control.The first, based on the theory of random sea wave, discusses the constitution of the random sea wave in terms of its spectrum. Solves the simulation problem of slope of wave surface and carry out it by programming.The second, based on the character of ship roll motion, create a linear model of ship roll motion by a certain ship parameter. Achieve a curve of ship roll motion in opened loop and the infection of certain slope of wave surface.The third, analyze the force when ship is rolling, study theory of the ship's steady, introduce the equipments of stabilizers, and computer one fin stabilizer's parameter, make the change of the angle of fin stabilizer and slope of wave surface by programming.Last, make sure every transfer function, and discuss the stability of this system. Study some theory of cantonments; find the conjunct of the theory and the system of fin stabilizer. Apply the control theory of PID, the control theory of the single nerve cell and the BP artificial neural network into the system of fin stabilizer. Analyze the effect of three parameters in PID theory; study the single neural cell's function and application in single neural cell's theory. Study the modeling and control model of BP neural network.All above, every style of control is applied out in fin stabilizer by programming, and simulation the result of this system in closed loop. So the remainder angle of the roll ship motion is obvious in every style of control, analysis of the effect of these style of control convenient.