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In the ships direction fuzzy control system main research intelligencecontrol fuzzy control in the ships intelligence navigationapplication, through realizes the ships direction intelligentmaintenance to the ships automatic rudder design. Uses in the shipsautomatic rudder design the fuzzy control to realize in the ships yawcontrol. The ships direction fuzzy control system because is easy toaccept with the understanding, the design is simple, is advantageousfor using and so on many merits receives the domestic and foreign moreand more widespread values. First, the present paper acts according to the domestic and foreignmaterials and the International Maritime Organization's relateddocument, analyzes the ships direction fuzzy control system researchthe importance, makes the brief introduction to the ships directionfuzzy control system background and the development, the shipsintelligence yaw control system in the experience classics control,the modern control, the intelligence controls these three stages inparticular the design characteristic. Next, the present paper elaboration fuzzy control mathematics basicprinciple, the fuzzy control system constitution and does the fuzzycontroller structure and the design, how specifically apply to theships direction fuzzy control system. Once more, the present paper further acts according to in the shipsintelligence guidance system the ships direction change and theheading hold two stages, designs three to have the different languagevariable fuzzy subset, the different control rule ships yaw controlsystem fuzzy controller, the analysis fuzzy controller designparameter to the controlled system performance influence. Finally, the present paper basis controlled member model, uses Matlabunder the environment the Simulink simulation integration environmentrealization from the pure fuzzy controller which designs to the entirefuzzy control system modelling and a simulation integratedenvironment. Separately in direction change period and heading holdperiod (consideration has rule disturbs direction fuzzy operation andirregular perturbation direction fuzzy operation) in the fuzzy controlsystem to examine the design the ships direction fuzzy controllercontrol performance, observes its control system the direction outputand the order to the helmsman output. In the simulation debugging,carries on the analysis to the fuzzy controller performance. Thesimulation indicated the ships direction fuzzy control system has thegood control performance, suits the ships heading hold and changes andso on the control request. The present paper will blur controls the technology to apply to theships yaw control, will solve because the tradition control methodwill exist in the ships yaw control the flaw, will realize in theships intelligence navigation direction fuzzy intelligent maintenanceand the shiphandling fuzzy control. In the appendix, the present paper also will produce some essentialsystem designs and the simulation reference, only supplies using ofthe reference. Key word: Fuzzy control, ships automatic rudder, ships intelligencecontrol, ships yaw control

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