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Method for establishing ship collision avoidance model based on non-Euclidean conformal transformation

A building method, a technology for ships, applied in the direction of design optimization/simulation, etc., can solve problems such as visual errors

Active Publication Date: 2020-03-17
WUHAN UNIV OF TECH
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Problems solved by technology

There are theoretical flaws in the analysis of the meeting situation based on the plane, mainly manifested in: due to the limitation of the dimension and plane of the two-dimensional plane model, the observation results of things will inevitably have visual errors of near big and far small

Method used

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  • Method for establishing ship collision avoidance model based on non-Euclidean conformal transformation
  • Method for establishing ship collision avoidance model based on non-Euclidean conformal transformation
  • Method for establishing ship collision avoidance model based on non-Euclidean conformal transformation

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Embodiment Construction

[0023] For a better understanding of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments.

[0024] 1. The relationship between relative speed and relative distance between ships when ships meet under the plane

[0025] like figure 1 As shown, a ship encounter model in Euclidean space is built. If there are two moving ships A and B in a certain sea area, assuming that the speed of ship B is superimposed on ship A, then ship B is stationary at point O , the ship A moves in the direction of the ship B at a constant speed V. Let the ship neighborhood of ship B be a circle with radius r. Draw a straight line L that intersects the circle in the direction of movement of ship A. The vertical distance d between the center O and the straight line L (referring to DCPA). When t=0, the difference between the distances of the two ships is S 0 , the dynamic distance between ship A and ship B during the movem...

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Abstract

The invention provides a method for establishing a ship collision avoidance model based on non-Euclidean conformal transformation. Eyeballs of a driver on duty are used as a research basis of lookoutobservation under a real condition; a spherical model is established on the ship by using a Riemannian spherical theory, one-to-one corresponding projection points are found on the spherical surface by using a spatial projection mode for all information in the plane where the ship is located, and the motion trail of the ship can correspond to an arc on the spherical surface by using the method soas to be more in line with the perception of human vision on risks. The research on the collision risk of the ship in the three-dimensional space situation can effectively reflect the relative speed and the relative distance of the ship under the real condition, and a ship operator on duty can effectively perceive the collision risk of the ship. According to the method, spherical surface mapping of a non-Euclidean space is carried out through projection transformation to carry out modeling, the method for calculating the relative speed and the relative distance of the two ships meeting the risk perception better is provided, and technical support is provided for drivers on duty to carry out correct collision avoidance decisions.

Description

technical field [0001] The invention belongs to the technical field of ship intelligent collision avoidance decision, and in particular relates to a method for establishing a ship collision avoidance model based on non-European conformal transformation. Background technique [0002] With the rapid development of my country's shipping industry, the volume of shipping trade has increased significantly. When carrying out international cargo transportation, the probability of collision between ships will continue to increase. However, even if the era of ship intelligence is coming, the risk of ship collision accidents cannot be effectively reduced for a long time. It is urgent and of great commercial value to propose an effective ship collision accident risk prediction and prevention and control mechanism. [0003] Nowadays, the collision avoidance decisions of ships when they meet are mainly based on the "1972 International Regulations for Preventing Collisions at Sea" (herei...

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Application Information

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IPC IPC(8): G06F30/20
Inventor 陈蜀喆孙杰张阳秦昌立王文博刘智鹏
Owner WUHAN UNIV OF TECH
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