DYNAMIC POSITIONING METHOD AND APPARATUS FOR SEMI-SUBMERSIBLE OCEAN PLATFORM, AND DEVICE AND MEDIUM

A dynamic positioning method and apparatus for a semi-submersible ocean platform, and a device and a medium. The method comprises: acquiring a real-time position of a platform; if the real-time position is different from a preset position, detecting an external stress moment by using a first moment detector; calculating first target thrust that each propeller needs to generate, controlling the propeller to generate thrust according to a first target thrust moment, and detecting an actual thrust moment; if the actual thrust moment is different from the first target thrust moment, that is, the propeller has a fault, acquiring a fault condition of each propeller; re-calculating the thrust of each propeller, i.e. a second target thrust moment, according to the fault condition, the external stress moment and a preset set of equations; and controlling each propeller to generate thrust according to the corresponding second target thrust moment. In the method, the external stress of a platform is directly measured by