Neural network-PID controller for roll fin stabilizer

Abstract

ABSTRACT

Control design of fin roll stabilization in beam seas based on Lyapunov's direct method

“…(13) When the equality LV < 0 is verified, the ship is stable and the required mechanical angle of the fins (α m ) is determined as follows: (14) By means of a electrohydraulic system, two fins are driven and create an additional righting moment. The actuator can approximately be described by a 1 st order equation as follows: (15) where:…”

“…Stabilization of parametric roll resonance in moderate head and following seas by combined speed and fin stabilizer control based on Lyapunov's direct method is presented by Galezzi et al [13]. A combined neural network and PID for roll control of ship with small draught considering hydraulic machinery constraints is presented by Ghassemi et al [14]. In this study, a fin controller based on Lyapunov's direct method is designed in order to reduce severe rolling motion of ship in steady beam seas under the influence of random wind force.…”

Conventional PID and Modified PID Controller Design for Roll Fin Electro-Hydraulic Actuator

“…Guan and Zhang [12], who expressed nonlinear damping terms with the Backstepping Integrator theory, controlled the nonlinear fin roll stabilizer by means of PID and close loop algorithms by ignoring high level nonlinear terms. Ghassemiet al [13] expressed that fin roll stabilizers are effective components in reducing roll amplitude out of wave movements. It was pointed out that lift forces occurring around the angle of attack and the fin roll stabilizer create a reversed moment.…”

Lmi - Based H2 and H State - Feedback Controller Design for Fin Stabilizer of Nonlinear Roll Motion of a Fishing Boat

“…Ghassemi et al [12] expressed active fin stabilizers are effective devices to reduce the roll motion of a ship againist wave movements. Therefore, he used PID and Neural Network combination to control attack angle.…”