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.