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Hydrofoil boat wave climbing control method

A control method and technology for hydrofoils, which are applied in the directions of ship hull, ship construction, and ships, can solve the problem of not being able to track the changes of waves in real time, and achieve the effect of reducing the hull hitting water.

Active Publication Date: 2019-03-01
HARBIN ENG UNIV
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Problems solved by technology

[0004] At present, there are few researches on the control method of hydrofoil ship climbing waves, and most of them use the optimal control strategy for research. The model is simple and cannot track the changes of sea waves in real time, so as to adjust the control strategy in time.

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] The following descriptions are only used to illustrate the technical solutions of the present invention more clearly, but not to limit the protection scope of the present invention. It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application shall have the usual meanings understood by those skilled in the art to which the present invention belongs.

[0025] In order to improve the sailing stability of the hydrofoil boat, carry out real-time tracking of the wave height of the sea, and reduce the hydrofoil water outflow and hull hit of the hydrofoil boat, the present invention proposes a hydrofoil boat climbing wave control method, and the specific implementation method is as follows figure 1 , figure 2 and image 3 shown, including the following steps:

[0026] Step P1, considering that the ocean wave ...

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Abstract

The invention provides a hydrofoil boat wave climbing control method and relates to the field of control strategies, specifically to a hydrofoil boat wave climbing control method. The hydrofoil boat wave climbing control method comprises the following steps of (1) establishing an ocean wave height sequence model and a predication sequence; (2) establishing a force and moment equilibrium linear equation; (3) measuring the height of a hull relative to a sea level; (4) calculating a deviation value of the hull following the waves; (5), judging hydrofoil water outlet and hull water striking situations; (6) designing a finite time-domain optimal control performance index, selecting a decision variable, calculating desired flap deflection angle needed by controlling, and controlling a longitudinal displacement height of a hydrofoil boat; and (7) repeatedly executing the whole optimizing process within an ocean wave period. According to the hydrofoil boat wave climbing control method, by forecasting an ocean wave sequence, a discrete segmental control method is designed to update control output in real time, and therefore, the hydrofoil boat tracks wave height change of a high ocean condition in time to reduce hydrofoil water outlet and hull water striking.

Description

technical field [0001] The invention relates to the field of control strategies, in particular to a wave climbing control method for a hydrofoil boat. Background technique [0002] A hydrofoil boat is a high-performance ship with the characteristics of rapidity, seakeeping, low resistance, and seaworthiness. The water flow quickly passes through the hydrofoil, thereby generating a pressure difference on the upper and lower surfaces of the hydrofoil to drag the hull up, reducing the humidity of the hull. Surface area, reducing frictional resistance and wave resistance, so that the navigation resistance is greatly reduced, which solves the problem of high resistance when the general displacement ship sails fast, greatly reduces the impact and influence of waves on the hull, and has good seaworthiness . However, since the hull of the hydrofoil boat is completely pulled out of the water surface, only the hydrofoil, rudder, and paddle are located under the water surface, so that...

Claims

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Application Information

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IPC IPC(8): B63B1/24G06F17/50
CPCB63B1/24G06F30/20
Inventor 刘胜牛鸿敏张兰勇许长魁
Owner HARBIN ENG UNIV
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