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Adaptive fuzzy optimal control method and system for nonlinear discrete system of ship heading

A nonlinear control, adaptive fuzzy technology, applied in the direction of adaptive control, general control system, control/regulation system, etc. The effect of reducing energy consumption, increasing speed and accuracy, and speeding up tracking

Active Publication Date: 2021-04-23
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in most of the current researches, the design method of ship course trajectory tracking is simple and the tracking speed is slow, which leads to the problems of energy consumption of the controller and serious wear and tear of the steering gear. Easy to implement

Method used

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  • Adaptive fuzzy optimal control method and system for nonlinear discrete system of ship heading
  • Adaptive fuzzy optimal control method and system for nonlinear discrete system of ship heading
  • Adaptive fuzzy optimal control method and system for nonlinear discrete system of ship heading

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Embodiment 1

[0121] Based on the above method, taking the actual ship as an example, computer simulation is carried out. Known: A ship heading discrete nonlinear system mathematical model parameter a 1 = 1,a 2 =30, K=0.2, T=64, designed parameters γ=0.05, γ c = 0.01, β = 0.05. Verify the validity of the control algorithm in this paper. The tracking signal selects a mathematical model that can represent the actual performance requirements:

[0122] φ m (k+2)+0.1φ m (k+1)+0.0025φ m (k) = 0.0025φ r (k) (15)

[0123] In the formula, Ideal system performance for ship heading, is a processed input signal, its value is 0°~30°, and its period is 500s.

[0124] Adaptive fuzzy optimal control method for ship heading nonlinear discrete system, the simulation results are as follows image 3 shown. It can be seen that the self-adaptive fuzzy optimal algorithm designed by this method, the control system can quickly obtain the desired system output, and has good tracking performance.

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Abstract

The invention provides an adaptive fuzzy optimal control method and system for ship heading nonlinear discrete systems, belonging to the technical field of ship automatic control. The method uses fuzzy optimization learning adaptive algorithm for ship heading nonlinear discrete systems to solve the problem of ship heading nonlinear discrete systems. The optimal control problem of the discrete nonlinear system of the heading can effectively reduce the energy consumption of the controller, reduce the wear of the steering gear, and improve the heading tracking speed and accuracy.

Description

technical field [0001] The present invention relates to the technical field of ship automatic control, in particular to an adaptive fuzzy optimal control method and system for ship heading nonlinear discrete systems. Background technique [0002] Ship motion has the characteristics of large time lag, large inertia, and nonlinearity. Changes in speed and loading produce parameter perturbations in the control model. Factors such as changes in sailing conditions, interference from environmental parameters, and inaccurate measurements all make the ship's course Uncertainty arises in the control system. In response to the problems caused by these nonlinear uncertainties, intelligent algorithms are continuously applied to the field of ship course control, such as adaptive control, robust control, fuzzy adaptive control, iterative sliding mode control, and least parameter learning methods have been applied to ship course control system. However, in most of the current researches,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B13/04G05B13/02
CPCG05B13/0275G05B13/042
Inventor 李铁山朱丽燕单麒赫陈俊龙左毅
Owner DALIAN MARITIME UNIVERSITY