| With the rapid development of shipbuilding and appearance of complicated marine environment,the controllabitity of ship has become increasingly demanding.The steering gear is one of the important equipment,which ensures the controllabitity of the ship,and its performance not only directly affects the ship's change of direction of rotation,but also the safety of ship sailing.The rotary vane steering gear with its simple external structure,steering mechanism arranged in the center of the rudder,the relatively smaller volume,high reliability,anti-attack vibration performance and low noise characteristics,has attracted increasing attention.Current steering gear with complex drive system,a lot of hydraulic line,large bulk,high requirements of the fat liquor cleanliness,big energy consumption and noisy,is still difficult to meet the requirement of the modernization of ships.In this case,was proposed in this paper direct-drive flange-type rotary vane steering gear.It combines the advantages of agile speed control of AC servo motor and a large output force of fluid transmission,and uses characteristics of the flange-type rotary vane steering gear instead of hydraulic servo valve which is easy to get stuck and variable pump which is needed to configure variable institutions.The bidirectional quantitative pump is directly driven by servo motors in order to control the rotary vane cylinder rotor shaft's forward and reverse and rotation speed.The direct-drive flange-type rotary vane steering gear with short system piping,high efficiency and saving energy,integrated installation,better control,anti-attack and good pressure performance,etc,can effectively improves the controllabitity and the safety of the ship.After focus on understanding the forms and drive controls of the steering gear,the characteristics of the steering gear and its development at home and abroad are summarized.The performances between rotary vane steering gear and conventional hydraulic steering gear are also introduced.The system features and current research trend on direct drive volume speed control are especially reviewed.After the shortage of the valve controlled steering gear system is pointed out,the rotary vane steering gear by direct drive volume control is put forward.A flange-type rotary vane steering gear is presented.Its characteristics and structural design are described.In order to reduce the volume and weight of the entire steering gear,improve the efficiency,the genetic algorithm is used for the optimization parameters of rotary vane cylinder-rotary vane steering gear major component.Then the feasibility of GA optimization algorithm is verified via the structure analysis software-Algor.In connection with the sealing problems for flange-type steering gear,an pressure feedback combination sealing device is designed.Aiming at the shortage of switching valve control and open pump control steering gear,integrated direct-drive power unit is designed for its drive control.According to the performance and optimization results of rotating blade cylinder,related components ?parameters are calculated.The speed performance of servo motor on power and load matching is simulated and studied.The mathematical model of AC servo motor vector control,pump control hydraulic power agencies and the load torque are established accurately.The main factors on affecting the dynamic performance of power institutions are analyzed.After deriving the transfer function of the entire system,the system's dynamic characteristics is analyzed..According to the mathematical model of the steering gear system,the simulation researches are done for the system.For higher-order nonlinear and uncertain load disturbance which direct-drive rotary vane steering gear system has,the particle swarm intelligence algorithm is designed for controller's optimization.Through comparative analysis,verifying that the particle swarm optimization algorithm is effective in direct-drive rotary vane steering gear control methods. |
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