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Ship longitudinal dynamic stabilization method and device

A technology of an anti-rolling device and a driving device, which is applied in the direction of using hydrofoils to act on the surrounding water surface to reduce the movement of the ship, which can solve the problems of increased hull oscillation, low anti-rolling efficiency, and reduced speed, so as to improve comfort and safety , high anti-rolling efficiency and easy installation

Inactive Publication Date: 2016-10-26
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Its anti-rolling effect is poor, the anti-rolling efficiency is low, and it will increase the navigation resistance of the hull to a certain extent and reduce the speed of the ship.
In addition, the structure of the existing anti-rolling device is relatively complicated, the arrangement is difficult, and even the safety of the ship's navigation is reduced due to the increased possibility of hull oscillation.

Method used

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  • Ship longitudinal dynamic stabilization method and device
  • Ship longitudinal dynamic stabilization method and device
  • Ship longitudinal dynamic stabilization method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0060] In this embodiment, the hydrofoil angle is automatically controlled by closed-loop control, and its specific implementation steps are as follows:

[0061] 1) The hull pitch sensor 13 collects the pitch angular velocity of the hull 1 and outputs a signal. The controller 12 receives the signal from the hull pitch sensor 13 and converts the pitch angular velocity into a pitch angle.

[0062] 2) When the hull reaches the maximum pitch angle, the blade angle of the hydrofoil (5) is adjusted to γ ​​by the driving device. When the pitch angle is the maximum positive value, γ is taken as -30°; when the pitch angle is the maximum negative value value, γ takes +30°. For positive and negative pitch angles see Figure 7 , see the positive and negative of γ Figure 2-4 .

[0063] In this step, the vane angle is γ and is adjusted in the following manner: the controller 12 sends instructions to the drive chip 11, controls the power input stepper motor 10, and stops the stepper moto...

Embodiment 2

[0066] The implementation steps of this embodiment are basically the same as method embodiment 1, and the difference is that in step 2), the blade angle of the hydrofoil 5 is determined by the following formula:

[0067] γ = M 4 ρv 2 A d δ = ( f ( θ ·· ) + f ( θ · ) + f ( θ ) ) - ( f ( θ ·· 1 ) ...

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Abstract

The invention discloses a ship longitudinal dynamic stabilization method and a corresponding ship longitudinal dynamic stabilization device. The method includes the following steps that firstly, the acceleration or the angular speed of longitudinal rotation of a stern is acquired and is further converted into a pitching angle of a hull; and secondly, when the hull reaches the largest pitching angle, the hydrofoil piece angle of a hydrofoil is adjusted to be gamma. The device comprises the hydrofoil, a supporting frame, a drive device, a transmission device and a control system. The front end of the supporting frame is fixed to a bottom board of the stern, and the hydrofoil is hinged to the rear end of the supporting frame through a rotary shaft. The drive device is connected with the hydrofoil through the transmission device. The control system comprises a controller, a hull pitching sensor and a hydrofoil angle sensor. The control signal output end of the controller is connected with the control signal input end of the drive device. The measured signal output ends of the hull pitching sensor and the hydrofoil angle sensor are connected with the measured signal input end of the controller. By the adoption of the method and device, longitudinal dynamic stabilization of the hull can be achieved, and the stabilization efficiency is high.

Description

technical field [0001] The invention relates to a ship longitudinal anti-rolling system, in particular to a ship longitudinal dynamic anti-rolling method and device. Background technique [0002] With the continuous development of science and technology, people pay more and more attention to the safety and comfort of travel. Nowadays, the comfort of air and land travel has been greatly improved, but in the field of ocean navigation, due to the influence of ocean wind and waves, ships are prone to tilting and swaying during navigation. Improving the navigation status of ships and improving the comfort of ocean-going voyages have therefore attracted more and more attention. [0003] At present, the research technology on the lateral anti-rolling of ships is very mature, but the research on the longitudinal anti-rolling is rarely fruitful, and the domestic research on the longitudinal anti-rolling is relatively blank. Therefore, the development of longitudinal anti-rolling te...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63B39/06
CPCB63B39/06
Inventor 秦江涛戴敬许磊周智慧姚兰柳高飞傅率智马程前
Owner WUHAN UNIV OF TECH
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