Suppress surplus torque based on velocity closed-loop synchronization

In order to suppress the surplus torque and improve loading precision of Electro-Hydraulic Load Simulator (EHLS), a new scheme for eliminating surplus torque - “velocity closed-loop synchronization” is proposed. In this paper, mathematical model of EHLS is built. On this basis, three disturbance coefficients are defined to analyze quantitatively adverse influences caused by the motion of rudder system. Results of simulation prove that this new strategy improves the response speed of compensation unit and has an excellent ability to suppress surplus torque.