Research On High Speed Catamaran Longitudinal Stabilization Control Method

With the increasing application of high-performance ships in various fields,people have increasingly higher requirements for the safety,stability and comfort of ships sailing in the ocean.Compared with the conventional monohull,the catamaran has obvious advantages and has less resistance to wave-making.Therefore,it has become an important research object of high-performance ships at home and abroad.However,during the high-speed sailing of the catamaran,the intensity of longitudinal movement is gradually increasing,which may have a negative impact on the crew and passengers and the precision equipment on the ship,and also restrict its development.Therefore,the research on longitudinal roll reduction of high-speed catamarans is of great significance.In this paper,a wave piercing catamaran is used as the model.Firstly,the motion and stress model of the catamaran is given.The anti-shake combination T-shaped hydrofoil and the pressure wave plate are used as the entry points.The relationship between lift and lift,based on genetic algorithm,was used to optimize the design of the anti-roll combination attachment,and the comprehensive structural layout of the T-shaped hydrofoil and the snorkel pressure plate was obtained.Heave and pitch response.This article will focus on the design process and simulation implementation of the longitudinal motion controller.By improving and optimizing the control method,a more complete longitudinal motion stability control system for the catamaran is established.First,a multi-variable decoupling auto-disturbance controller is designed for the catamaran longitudinal anti-rolling system,and the parameter value is set.The simulation is established using the simulink module.Through comparison simulation with PID control,the high-speed catamaran under typical ADRC control is simulated.The response of the ship’s longitudinal motion is smaller,and the anti-interference performance of the entire system is enhanced,which shows the superiority of ADRC control over traditional PID control.Then,because the ADRC controller needs to set more parameters,it adds difficulty to the actual operation setting.The fuzzy control can optimally estimate the parameters and has the ability of adaptive reasoning.Therefore,the fuzzy ADRC controller is designed.Utilize the strong anti-interference ability of the auto-disturbance-rejection controller,and also use the advantages of fuzzy control to modify the self-disturbance parameters on-line to improve the adaptive ability.Finally,in order to improve the anti-interference ability of the classical ADRC control under the requirements of higher accuracy,based on the advantages of sliding mode control,the control algorithm is modified by "variable structure" of the state expansion observer and nonlinear state error feedback law To improve it,a variable structure ADRC is designed.It is simulated and compared with the classic ADRC control,which proves that the improved controller has better anti-interference ability,more stable system performance and better anti-shake effect.