KR20050014369A - A control performance deduction model examination device of the vessel - Google Patents

Abstract

PURPOSE: A captive model test device for maneuvering characteristic estimation of a ship is provided to exactly estimate a maneuvering characteristic by rolling motion produced during maneuvering motion. CONSTITUTION: A captive model test device for maneuvering characteristic estimation of a ship comprises a 4-force component measurement system, a rolling motion-fixing device(80), a slider(10), bearings(30,40), central weights(60), and a lower strong back(70). The 4-force component measurement system comprises 1-axial force component systems(X1,X2,Y1,Y2,Z1,Z2) to measure the force of four directions of a stem direction, a horizontal direction, a stem motion direction, and a rolling motion direction. The rolling motion-fixing device fixes a bearing freeing the movement of the rolling motion direction of a model ship. The slider slides to move to the rolling motion-fixing device. The bearings free upper and lower roll, longitudinal roll, and horizontal roll. The central weight balances to prevent weight by the test device connected to each force component system from acting. The lower strong back is installed to the mode ship. The captive model test device is mounted to the model ship of a small size manufactured like a real ship.

Description

A control performance deduction model examination device of the vessel

The present invention relates to a restraint model test device for estimating steering performance including a ship's lateral fluctuation phenomenon. It is possible to estimate the steering performance of the ship including the rolling motion by calculating the included steering fluid force coefficients, and to effectively use it for estimating the steering performance of container carriers where the rolling motion is important and the ship's rollover analysis.

Recently, ships with poor steering performance have emerged due to the development of a special linear for the enlargement of ships and the improvement of propulsion efficiency, and the risk of shipping accidents is increasing day by day.

Conventionally, Patent No. 0343022 describes a sea trial operation measurement system of a ship that measures the 4 degree of freedom motion and resistance of a model ship when testing a reduced model ship by reproducing a reduced wave of an actual marine state, and Patent Publication No. 1996-0014967. In order to measure the test run of a ship using a GPS receiver, the navigation direction of the test ship is selected according to the current conditions and the surrounding conditions such as waves, so that more accurate measurement is possible and the results can be analyzed using the GPS receiver. A trial run measurement apparatus of a ship has also been proposed.

In the case of ships, performance-related trials such as sea trials are performed by speed test, turning test, zigzag test, stop test and spiral test, and the results are written in the test report.

The commissioning report should be preceded by signals from various navigation equipment, ie heading angle, engine RPM, brake horse power (BHP), wind speed, wind direction, wave direction, wave height, tidal current measurement and analysis.

However, the identification of the various signals during the trial run was measured by the observation of the trial run personnel, thus making it difficult to ensure the accuracy of the degree. In addition, there is a problem in that an expert's effort and time are required to interpret data and prepare a report using the obtained results, and there may be some disagreement about the results.

In Patent No. 350812 and Utility Model No. 242902, the lateral oscillation damping device of the ship uses the lateral oscillation angle and the rudder angle as the main input data for the operation of the lateral oscillation damping device, and the information about the Roll Angular Velocity. Is not used as an input variable, so the response (RESPONSE) to the change in the rolling cycle is not accurate.

In addition, if the change of the ship's rolling cycle is severe, it is difficult to adjust the rolling controller appropriately in time, which may cause a danger to the occupants and the safety of the ship.

The restraint model test apparatus for measuring the control fluid force coefficient required for estimating the maneuvering performance of a ship has already been developed and widely used, but they can only measure the force in three directions such as bow direction, transverse direction and bow movement direction. It can't be a system. Therefore, these systems have limitations in that they cannot measure the control fluid force coefficients necessary for estimating the maneuvering motion of ships including transverse fluctuations.

Accordingly, the present invention has been invented to solve the problems in view of the above-described problems of the prior art, and a ship including a lateral sway capable of more accurately estimating the steering performance due to the lateral sway motion generated during the steering motion of the ship. It is an object of the present invention to provide a restraint model test apparatus for estimating the control performance of a vehicle.

In order to achieve the above object, the present invention provides six single-axis component meters (X₁, X₂, Y₁, Y₂, Z₁, Z₂) to measure force in four directions, such as bow direction, lateral direction, bow movement direction, and lateral swing direction. A four-component measuring system consisting of a), a lateral sway fixing device (80) for fixing a bearing to free the movement in the lateral sway direction of the model ship, and a slider which is slid to move to the position of the sway (80) 10), a lateral oscillation drive motor 20 connected to the slider 10, bearings 30, 40, 50 for freeing up and down oscillation, driven oscillation, and lateral oscillation, and respective component meters, Constrained model test device is composed of a central weight 60 to balance the weight by the experimental device to be connected and the lower strong bag 70 is installed on the model ship, the restraint model test device is a real ship Small model ship made exactly like It is characterized by being attached to.

In addition, the restraint model test apparatus for estimating the steering performance of the present invention does not use the lateral oscillation moment by using a moment calorimeter, and uses two up-and-down one-axis zonometers (Z₁, Z₂) separated by a constant distance from the center of the lateral oscillation. In other words, the method of measuring by means of the horizontal oscillation moment is characterized in that the force measured from the uniaxial calorimeters Z₁, Z₂ is multiplied by the distance away from the center of the oscillation.

In addition, the bearing 50 for lateral fluctuation is installed in the axial component momentometer (Z₁, Z₂) for measuring the lateral fluctuation moment. It is measured and the transverse shaking moment is configured not to act.

Hereinafter, with reference to the accompanying example drawings for the constraint model test device for estimating the steering performance of the ship including the transverse shaking according to the present invention will be described in more detail the configuration and operation effects as follows.

1 is a block diagram illustrating a constraint model test apparatus for estimating the steering performance of a ship including a transverse shaking to which the present invention is applied;

<Description of the symbols for the main parts of the drawings>

X₁, X₂, Y₁, Y₂, Z₁, Z₂: one-way component

10: slider 20: drive motor

30,40,50: Bearing 60: Center weight

70: lower strong bag 80: roll shake device

Constrained model test device for estimating the steering performance including the lateral fluctuation of the present invention is to make a model line having the same shape as the actual ship and to perform a series of experiments to perform a series of experiments, the bow direction, the lateral direction, and the bow movement direction And force in four directions, such as transverse shaking direction, to obtain steering fluid force coefficients from it and used to simulate steering motion.

The model ship installs the lower strong bag (70) in the model ship and connects it to the experimental device. The model ship is towed at a constant speed in the water tank, and the forces and moments acting on the model ship are six single-axis calorimeters (X₁, X₂, Y₁, Y₂, Z₁, Z₂) can be used to measure the force in four directions such as bow direction, transverse direction, bow direction and lateral direction that act on model line.

The bearing 30 is installed to free up and down rocking and the follow-up movement acting on the model ship, and the bearing 40 is installed to remove the yaw moment acting on the Y component system.

Where there are X₁, Y₁ calorimeters, bearings (40) are installed to free the transverse movements so that the transverse moments do not work. Bearings (50) are provided to free the sideways movements where there are X₂, Y₂, Z Z, Z₂ A fixing device 80 is provided to fix the lateral fluctuation so that the lateral fluctuation moment acting on the model line acts on the Z₁ and Z₂calimeters.

The transverse moment acting on the model line is obtained by multiplying the force measured by the Z₁ and Z₂ calorimeters by a certain distance and the distance from the center of the transverse moment to the uniaxial calorimeter. However, the bearing 50 is installed to free the lateral fluctuation so that the lateral fluctuation moment does not act on the Z₁ and Z₂ calorimeters.

In addition, the lateral oscillation was freed for the entire system, and the lateral oscillation movement was applied to the entire test apparatus by using the driving motor 20 at the rear of the X₂ and Y₂ calorimeters.

In addition, the center weight 60 is installed to balance the weight by the 1-axis calorimeter and the test apparatus so that it is mounted on a model ship of a small size manufactured like a real ship, and then the lower strong bag 70 is tested. Connect to the device.

The present invention configured as described above has a fixed speed model of the pilot ship in the small size model ship manufactured in the same size as the actual ship in order to estimate the steering performance of the ship in a fixed speed in the tank in the state Towing, a series of experiments can be performed to simulate the steering motion.

As the model ship is towed at a constant speed in the tank, the forces and moments acting on the model ship using six single-axis calorimeters (X₁, X₂, Y₁, Y₂, Z₁, Z₂) Measure it.

Using the measured forces and moments, the steering fluid force coefficients are obtained, and the coefficients are used to solve the steering motion equations and simulate the steering motion of the ship by computer.

In the simulation result, the ship's sideways motion is taken into consideration, and thus the estimation can be performed more realistically than the conventional steering performance estimation method.

As described above, according to the present invention, in order to estimate the steering performance of the ship, a series of experiments are carried out with a constraint model test device for estimating the steering performance mounted on a model ship manufactured with the same shape and smaller size as the actual ship. By simulating the maneuvering fluid force coefficient and maneuvering motion, it is possible to estimate the maneuvering performance of the ship including the tumbling motion. You will get the effect, such as being.

Claims (3)

In testing ship maneuverability using simulation, Four-component measuring system composed of six single-axis components (X₁, X₂, Y₁, Y₂, Z₁, Z₂) to measure the force in four directions such as bow direction, lateral direction, bow movement direction and lateral swing direction. A lateral sway holding device 80 which fixes a bearing to free the movement in the lateral sway direction of the model line, a slider 10 which is slid so as to be movable by the sway fixing device 80, and the slider 10 and Weight by the lateral oscillation drive motor 20 to be connected, the respective bearings 30 and 40 to free up and down oscillation, the longitudinal oscillation, and the lateral oscillation, and the experimental device connected to each calorimeter The restraint model test apparatus is composed of a center weight 60 that balances the weight, and a lower strong bag 70 installed on the model ship, and the restraint model test apparatus is formed on a model ship of a small size manufactured like a real ship. Characterized in that Restraint model test device for estimating ship's steering performance including transverse shaking The uniaxial calorimeter (Z ₁ , Z ₂ ) for measuring the lateral oscillation moment is installed in the uniaxial calorimeters Z ₁ and Z ₂ . A restraint model test apparatus for estimating the maneuvering performance of a ship including a lateral oscillation, characterized in that only the force in the up and down directions is measured and the lateral oscillation moment is not applied. The transverse oscillation moment using the restraint model test device for estimating the steering performance is a force measured from two up-and-down unidirectional calorimeters (Z ₁ , Z ₂ ) separated by a predetermined distance from the center of the transverse oscillation. Restraint model test apparatus for estimating the steering performance of a ship comprising a lateral shake, characterized in that consisting of multiplied by the distance away from the center of the roll.