Marine condition estimator

A technology of estimator and sea state, applied in the field of sea state estimator, can solve the problem of high cost

Active Publication Date: 2014-07-02
HARBIN ENG UNIV
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Problems solved by technology

In order to solve the real-time analysis of sea conditions, it has been used to calculate the wave height of sea waves by using the time difference between the radar emission signal installed on the ship and the reflected wave of the radar signal through the wave surface and the speed of the ship, and t...

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Embodiment Construction

[0041] The present invention will be further described below in conjunction with the accompanying drawings.

[0042] The structural block diagram of the sea state estimator based on the AR model of the present invention is as follows figure 1 shown. The estimator is mainly composed of ship roll signal collector, AR model parameter identifier, white noise simulator, roll angle spectral density estimator, wave spectral density reverser, sea state calculation unit and other parts.

[0043] Among them, the ship roll signal collector is realized by a digital A / D acquisition interface, which is responsible for the acquisition of the ship roll angle signal, including the filter processing of the collected signal. The white noise simulator adopts pseudo-random sequence and digital method to simulate the white noise sequence needed in the parameter identification of the AR model, which is used as the random input signal of the parameter identifier of the AR model. The AR model para...

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Abstract

The invention belongs to the field of marine environment monitoring and in particular relates to a marine condition estimator, which comprises a ship rolling signal acquisition device, an AR (auto regressive) model parameter identifier, a white noise simulator, a rolling angular spectrum density estimator, a sea wave spectrum density reverse calculator and a marine condition computing unit. Compared with a measuring method based on a radar wave and a radio wave reflection principle of the radar wave, the marine condition estimator is simple in structure, needs no extra hardware cost, is accurate in estimation and can meet the requirement of supporting devices of a sea ship on marine condition information.

Description

technical field [0001] The invention belongs to the field of ship environment monitoring, and in particular relates to a sea state estimator. Background technique [0002] The motion attitude control of a ship at sea is closely related to the sea conditions, and the control effect of the ship motion attitude control system has a very close relationship with the sea state. How to estimate the sea state in real time in the control system and adjust the control parameters in a timely manner will greatly improve the ship motion. The attitude control effect improves the ability of the ship to adapt to harsh sea conditions. In order to solve the real-time analysis of sea conditions, it has been used to calculate the wave height of sea waves by using the time difference between the radar emission signal installed on the ship and the reflected wave of the radar signal through the wave surface and the speed of the ship, and then determine the sea state according to the calculated wav...

Claims

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Application Information

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IPC IPC(8): G01C13/00G06F17/50
CPCG01C13/00Y02T90/00
Inventor 吉明梁利华金鸿章张松涛王经甫史洪宇杨生宋吉广
Owner HARBIN ENG UNIV
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