Active anchoring positioning optimization control method and system

Abstract

Embodiments of the present invention disclose an active anchoring positioning optimization control method and system. The method comprises: acquiring anchor cable tension data corresponding to each anchor cable in the platform, calculating anchor cable tension data required for each anchor cable since the platform reaches a desired position under the current environmental disturbance, and assigning the anchor cable tension data to the respective anchor machine controller to adjust the anchor cable tension of each anchor cable; detecting platform displacement change data in real time; comparingthe platform displacement change data with the expected displacement, and outputting a comparison result; and based on the comparison result, optimizing the tension threshold corresponding to each anchor cable under the current environmental disturbance, and assigning the optimized new tension threshold to the respective anchor machine controller for adjustment. According to the technical schemeof the present invention, the defect that only the approximate solution of the tension assignment can be obtained by using the relaxation method is overcome, the dimensionality reduction algorithm isused to strictly satisfy the equation, and the defect of the dimensionality reduction algorithm is solved; and by using the optimization scheme of the K-value weight in the adaptive adjustment evaluation function, the anchor equipment can actively adjust the tension, and the positioning ability of the ship is improved

Description

technical field [0001] The invention relates to the technical field of mooring positioning, in particular to an active mooring positioning optimization control method and system. Background technique [0002] Such as figure 1 As shown, the mooring positioning system of large offshore oil platforms mostly adopts an 8-point symmetrical anchor arrangement method, and 4 double-sprocket horizontal anchor winches control the retraction and release of the tops of 8 mooring lines L1-L8 respectively. In order to minimize the movement of marine floating structures, the traditional anchoring auxiliary dynamic positioning system usually tightens each anchor chain as much as possible under the condition of strength permitting. Due to the limitation of windlass power and speed, the mooring line is not necessarily If the control command issued by the tension distribution controller can be reached within the specified time, the platform will not reach the desired position, the positioning ...

AI Technical Summary

Problems solved by technology

In order to minimize the movement of marine floating structures, the traditional anchoring auxiliary dynamic positioning system usually tightens each anchor chain as much as possible under the condition of strength permitting. Due to the limitation of windlass power and speed, the mooring line is not necessarily If the control command issued by the tension distribution controller can be reached within the specified time, the platform will not be able to reach the desired position, the positioning accuracy of the system will decrease, and the anchor windlass will continue to run, thereby increasing energy consumption.

[0003] That is to say, the above relaxation method has the defect that only an approximate solution of the tension distribution can be obtained

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