Modeling And Simulation Of Hydraulic Steering System Of The "Pacific"

With the development of the shipping industry, maritime transport density is increasing day by day. For the safety of navigation and economy continually increasing demands for heading control, ship heading control system structure and control performance is an important factor which affect normal navigation of the ship. Once the steering gear has a breakdown, the ship will lose control, even come a howler."Ship hydraulic steering system of training and assessment" content has been promulgated by the International Maritime Organization in the SOLAS Convention. This requires the crew training simulation system must have the corresponding actuator system for crew training. Therefore, Kawasaki FE21-400ship hydraulic steering gear control system is used for the study, in order to accomplish a complete autopilot system dynamic simulation and analysis process.Firstly, based on the ship motion mathematical model of two degrees of freedom and three degrees of freedom state space, considering wind, wave, flow and other environmental factors, this article establishes one step Nomoto mathematical model of ship motion. Secondly, taking hydraulic system working principle of the "Pacific" million boxes container for example, around equations of motion control method and system of the various parts of the steering system, establish a mathematical model of the ship steering gear system. Based on feedback control theory into sub-module, through Matlab and Simulink software package, using modular modeling method to complete dynamic simulation. Verify the correctness and validity of the model, and the result satisfies requirements of the SOLAS Convention. Thirdly, relevance the hydraulic steering system with the Nomoto ship model. PID controller is designed based on the automatic rudder dual closed-loop system modeling and simulation, analyze the heading curve to verify the validity of the model. Finally, complete interface designing of the ship steering system based on VC++6.0,and successfully apply it to the DMS-2012simulator.