Marine power positioning control method based on fuzzy adaptive algorithm

A fuzzy self-adaptive, dynamic positioning technology, applied in two-dimensional position/channel control and other directions, can solve the problems of inability to achieve optimal control and low optimization efficiency, and achieve the effect of reducing energy consumption and improving dynamic positioning accuracy.
CN1776555AInactive Publication Date: 2006-05-24SHANGHAI JIAO TONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI JIAO TONG UNIV
Publication Date
2006-05-24
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention includes steps: (1) using position finding system to measure position information of ship; (2) using A / D convertor converts position information obtained from step (1) to digital signal; digital signal passes filter, and the part of frequency less than frequency of waves is transferred to controller; (3) blur adaptive algorithm contained in controller fuzzifies received precise information; (4) control force signal generated by controller passing through D / A converter obtains analog signal, which is enhanced by amplifier and output to actuator; (5) actuator carries out execution according to instruction, and ship is moved to appointed position. The invention better counteracts effect on ship hull by coming environmental force (including wind, wave and stream etc. forces) in feedforward. Thus, ship is able to reach appointed position under minimal error and impulsion. Advantages are: lowering energy consumption, and increasing dynamic positioning precision.
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Description

technical field

[0001] The present invention relates to a control method in the technical field of ship engineering, in particular to a control method for ship dynamic positioning based on a fuzzy self-adaptive algorithm. Background technique

[0002] The current ship dynamic positioning control system is generally composed of a controller, a potential amplifier, a filter, a position measuring probe and an actuator. There are various control methods used in the controller, among which the "proportional-integral-differential" method is used. For example, the PID method, the ship must drift in place after being affected by environmental forces such as wind, waves, and currents. At this time, the PID system acts as a feedback control to reset the ship. Ships of hundreds of tons to several million tons Often relying on power to move around must consume a lot of energy. In addition, the requirements for offshore dynamic positioning accuracy also vary with tasks. When a pipe-layi...

Claims

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