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A Maritime Search Area Estimation Method Based on Wind Pressure Difference Overturn Drift Model

A technology of drift model and estimation method, which is applied in the direction of instruments, complex mathematical operations, and informatics, can solve the problems of unclear causes of wind pressure difference reversal, difficult measurement, and change of wind pressure difference speed direction, etc., to achieve easy calculation and Setting, improving success rate, small area effect

Active Publication Date: 2019-12-10
SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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Problems solved by technology

There are three reasons for this: ①The cause of wind pressure difference reversal is not clear; ②It is not easy to measure the change of wind pressure difference velocity direction; ③There is no effective statistical method to determine the probability of wind pressure difference reversal

Method used

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  • A Maritime Search Area Estimation Method Based on Wind Pressure Difference Overturn Drift Model
  • A Maritime Search Area Estimation Method Based on Wind Pressure Difference Overturn Drift Model
  • A Maritime Search Area Estimation Method Based on Wind Pressure Difference Overturn Drift Model

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Embodiment Construction

[0046] The present invention will be further described in detail below in conjunction with the examples.

[0047] The invention discloses a method for estimating the search area of ​​floating objects on the sea. On the one hand, the method considers the reversal of the wind pressure difference, and proposes a calculation method for the reversal rate of the wind pressure difference, and then establishes the drift model of the floating objects; on the other hand, Based on the established drift model, the search area of ​​floating objects is estimated by Monte Carlo method which is suitable for the random nature of the problem itself.

[0048] The calculation method of wind pressure difference turnover rate is as follows.

[0049] The angle at which the target deviates from the wind direction is called the wind pressure difference angle L α . The wind pressure difference L is related to the object type, immersion ratio, etc. Decompose the wind pressure difference into the down...

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Abstract

The invention relates to a maritime search region estimation method based on a leeway overturning drift model. The method comprises the steps that wind speed variation is normalized; the influence of the speed of a target on leeway overturning is obtained according to target drift speed; a leeway overturning rate is solved according to the normalized wind speed variation and the influence of the speed of the target on leeway overturning, and whether current leeway overturns is judged; a target drift model is obtained according to a leeway overturning structure; and a Monte-Carlo method is adopted to estimate a search region based on the target drift model. The search region estimated through the maritime search region estimation method based on the leeway overturning drift model can contain search targets to the maximum extent, the area is small, unavailing search for an invalid region can be avoided, and the success rate of maritime search is increased.

Description

technical field [0001] The invention belongs to the field of maritime search and rescue, and relates to the establishment of drift models of floating objects (or called targets) on the sea and the estimation of search areas. Background technique [0002] With the development of economy and trade and the implementation of marine development strategies, activities such as ocean transportation, fishing, and offshore oil exploration have become increasingly frequent, and the frequency of water hazards and accidents has also increased. When a shipwreck occurs, in order to minimize the loss of life and property, it is necessary to estimate the search area accurately and quickly, thereby improving the success rate of maritime search and rescue. Accurate search area delineation includes two requirements: ①The search area contains the search and rescue targets with the greatest probability, so as not to miss the search and rescue targets; ②The search area is as detailed and as small ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F17/10
CPCG16Z99/00
Inventor 赵怀慈郑宏喆郝明国王立勇刘明第
Owner SHENYANG INST OF AUTOMATION - CHINESE ACAD OF SCI
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