Semi-physical simulation method for DP-3-level dynamic positioning

The invention aims to provide a semi-physical simulation method for DP-3-level dynamic positioning. The semi-physical simulation method comprises the steps of: firstly, appointing a command power display and control platform in a display and control system, and commanding one of control computers to be a master control computer through the command power display and control platform; after a simulation work station completes the setting of a required sea state, sending motion information of a floating facility to an information conversion intermediate machine once after one simulation beat; then performing resolution on motion control by the control computers respectively, and performing majority voting on a resolution result of each beat to finally determine the control output of the master control computer; and acquiring a simulation control command resolved by the group of the control computers through a serial port by the information conversion intermediate machine, sending digitalsignals to a simulation computer through a network, and simultaneously transmitting the motion information, which is obtained through resolution of the simulation computer, of the current floating facility to the control computers through a serial port so as to ensure that the control computers perform a new round of control command solving according to updated sate information. According to the invention, the system reliability is greatly increased.