Simulation analysis of the variable frequency hydraulic steering gear system

Through analyzing working principle of the variable frequency hydraulic steering gear system, mathematical model was set up using Matlab Simulink software; the model was modified by comparing with measurement data until the calculation accuracy reaches higher level; the dynamic response characteristics of the variable frequency motor can not be neglected when the simulation was made, and also not the mechanical clearance and the leakage of hydraulic system. Based on the simulation, the steering gear system response will become quicker when increase the proportional coefficient of controller and reduce the area of cylinder and the distance between the centre lines of cylinder and the rudder stock.