Dalian Maritime R & D's "ship dynamic positioning control technology" made a breakthrough

Recently, the Ministry of Transport's Applied Basic Research (Main Discipline) project “Research on the All-weather Dynamic Positioning Adaptive Control Technology for Ships” undertaken by Dalian Maritime University passed the acceptance test. The project puts forward a control scheme of “changing invariably change” to solve the problem of adaptive control of the ship's all-weather dynamic positioning.

The project comprehensively analyzes the research status of ship dynamic positioning control at home and abroad, and uses adaptive technology, vector inverse, dynamic surface, neural network and other control methods to analyze, determine and quantify the relationship between the disturbance power received by the ship and the change of the sea state. The ship dynamic positioning system simulation platform was established. Aiming at the problems that the dynamic model parameters of the ship dynamic positioning system are difficult to determine, and the disturbance dynamics caused by environmental factors such as wind and waves are difficult to predict, the disturbance observer and the adaptive controller are designed to ensure the dynamic positioning system under different working conditions and working conditions. Work normally around the clock. When the speed of the ship is unmeasurable, the robust observer is designed to provide the motion state estimation of the ship's position and velocity, and the dynamic positioning of the ship is realized. Adapt to robust output feedback control.

Ship dynamic positioning refers to the propulsion force generated by the ship using its own propulsion device to resist the effects of environmental disturbances such as wind, waves, and current, so that it maintains a certain position on the sea surface or along a certain preset in a certain posture. The trajectory of sailing. The technology has the characteristics of high positioning accuracy, avoiding damage to the seabed, no water depth limitation, and positioning cost does not increase with increasing water depth, and is widely used in the field of marine engineering.