KR101072440B1 - Propulsion Supply Device and Method for Free Running Model Test - Google Patents

Abstract

The present invention relates to a device used in the free Hangzhou model test for estimating the steering performance of the ship and a test method using the same. The present invention is to solve the problem of the operating point of the existing method for the free Hangzhou model test, using the servomotor, to apply the auxiliary thrust to the center of gravity of the model ship and to automatically apply the correct value of the auxiliary thrust It is an object of the present invention to provide an auxiliary thrust device and a test method using the same.

Ship, steering performance, free hang model test, scale effect

Description

Auxiliary thrust device for free Hangzhou model test and test method using same {Propulsion Supply Device and Method for Free Running Model Test}

The present invention relates to a device used in the free Hangzhou model test for estimating the steering performance of the ship and a test method using the same.

The free hang model test is performed to estimate the ship's maneuverability. The free hang model test results in a scale effect due to the use of a model scaled down to the accumulation ratio.

This scale effect refers to a phenomenon in which various physical quantities measured in geometric lines that are similar to each other do not satisfy the mechanical similarity law due to the influence of size. In other words, if the model line is reduced according to the Froud Number, the speed is reduced to 1 / λ ^1/2 , and the propeller rotational speed of the model ship harbor point to match the reduced speed is smaller than the propeller rotational speed of the solid ship harbor point. It will be faster. As a result, the flow between the propeller and the other is formed differently from the flow at the solid vessel port, and as a result, the steering performance of the ship is estimated differently.

The complementary method is to apply the additional towing force to the model ship while pushing the model ship to the propeller rotation speed of the solid ship port. Conventionally, 1) a device that generates wind like a fan in the model ship. To apply the thrust by weighing, or 2) the method of adding the weight corresponding to the auxiliary thrust by weighing was used.

However, in the method of 1), it is difficult to apply the correct auxiliary thrust while installing on the upper part of the hull, and when using jet air, it is difficult to test at the exact solid ship port, so it is tested twice or more at the lower or higher point than the solid ship port for interpolation. There was a hassle to implement. And the method of 2) can be used when there is no problem for acceleration because the test section is large, such as a large water tank, it may be difficult to use depending on the size of the tank, there is a problem that the test efficiency is lowered by applying the heavy material by manual work.

The present invention is to solve the problem of the operating point of the existing method for the free Hangzhou model test, using the servomotor, to apply the auxiliary thrust to the center of gravity of the model ship and to automatically apply the correct value of the auxiliary thrust It is an object of the present invention to provide an auxiliary thrust device and a test method using the same.

Other objects and advantages of the present invention will be described below, which are not limited to the matters set forth in the claims and the disclosure of the embodiments thereof, but also to the broader ranges by means and combinations within the range readily recited therefrom. Add that it will be included.

The present invention to achieve the above object,

A body of a rectangular shape that extends forward and backward, which is attached to the lower surface of the towing tank; A thrust unit which is driven while mounted on the body and accelerates a model ship towed under the body or applies auxiliary thrust to the model ship; A clamping part for driving in a state mounted on the body to fix the model ship towed under the body so as not to shake; Remotely driven towing tank, including a control unit for controlling the operation of the motor for the application of the auxiliary thrust to the model ship,

The thrust unit accelerates the model ship by operating the acceleration winch in acceleration mode, and operates the auxiliary thrust winch in the auxiliary thrust mode to apply auxiliary thrust to the model ship. The clutch enables the motor to operate the acceleration winch, and in the auxiliary thrust mode, the clutch changes the gear to the auxiliary thrust winch, and the acceleration winch for accelerating the model ship by towing the acceleration rope connected to the model ship. In addition, the thrust rope connected to the load cell of the model ship is towed by the auxiliary thrust winch to apply the auxiliary thrust to the model ship,

The clamping unit is a main clamping control motor for maintaining and fixing the secondary posture of the model ship by winding the main clamping rope connected to the model ship, and an auxiliary clamping control for maintaining and fixing the primary attitude of the model ship by winding the auxiliary clamping rope connected to the model ship. Including a motor,

The control unit is equipped with a motor driver and a controller and consists of a control driver box for controlling the operation of the motor mechanically, an industrial touch screen PC and a control panel, and comprises a remote controller for remotely driving the towing vehicle. The auxiliary thrust device for the free Hangzhou model test is presented.

In addition, the present invention,

As a test method using the auxiliary thrust device for the free Hangzhou model test,

A clamping mode step of fixing the model ship towed under the body so as not to shake; An acceleration mode step of accelerating the model ship by towing an acceleration rope connected to the model ship with an acceleration winch; A maintenance mode step of maintaining the speed of the model ship made through the acceleration mode at a constant time; The auxiliary thrust winch proposes a test method using the auxiliary thruster for the free hang model test including the auxiliary thrust mode step of applying the auxiliary thrust to the model ship by towing the auxiliary thrust rope connected to the load cell at the center of gravity of the model ship.

According to the present invention, the following advantageous effects occur.

First, the problem of not properly applying the auxiliary thrust action point when using the existing wind or air jet was solved by applying to the center of gravity, and it was possible to accurately calculate and apply the auxiliary thrust force by using the torque control of the motor.

Second, by calculating the torque control command of the motor as an auxiliary thrust value, any value from the remote controller can be applied at any time within the allowable range, thereby solving the problem of the conventional method of giving additional weight by using a weight. It became.

Third, it is possible to improve the efficiency and safety of the free Hangzhou model test by including the clamping function, the acceleration function and the auxiliary thrust function in a sequence in the system.

Fourthly, in general, when the acceleration of the motor is insufficient or the water tank is limited, the test area is limited. The present invention enables the effective use of the water tank test area by implementing the acceleration function.

Other effects of the present invention, as well as those described in the above-described embodiments and claims of the present invention, as well as potential effects that may occur within the range that can be easily estimated therefrom and potential advantages that contribute to industrial development It will be added that it will be covered by a wider scope.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are assigned to the same components as much as possible, even if shown on different drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In addition, the following will describe a preferred embodiment of the present invention, but the technical idea of the present invention is not limited thereto and may be variously modified and modified by those skilled in the art.

The present invention provides an auxiliary thrust device and a test method using the same, which allows the free Hangzhou model test to be performed at a solid ship port in consideration of the scale effect. In order to solve the problem of the point of operation, the servomotor is used to apply the auxiliary thrust to the center of gravity of the model ship and to automatically apply the correct value of the auxiliary thrust.

In the auxiliary thrust device according to the present invention is attached to the lower surface of the towing tank is a rectangular body 11 extending forward and backward (Fig. 7, Fig. 8).

In addition, the thrust part and the clamping part which are driven in the state mounted on the body 11 and the control unit which is driven remotely with respect to a towing tank are mutually linked, and the auxiliary thrust with respect to the model ship towed under the body 11 by mutually connecting. Will be applied.

Each module constituting the auxiliary thrust device according to the present invention has the following components. Hereinafter, this will be described in detail with reference to FIGS. 1 to 5.

Thrust

The thrust portion is a module for accelerating the model ship towed below the body 11 or applying auxiliary thrust to the model ship. The thrust portion is composed of a servo motor 1, a clutch 2, an acceleration winch 3, an auxiliary thrust winch 4, a rope guide 6, a lateral moving rail 7 and the like.

The servomotor 1 precisely controls the rotational speed of the acceleration winch 3 and the auxiliary thrust winch 4 by adjusting the speed by itself. The servomotor 1 accelerates the model ship by operating the acceleration winch 3 in the acceleration mode, and applies auxiliary thrust to the model ship by operating the auxiliary thrust winch 4 in the auxiliary thrust mode. Here, the acceleration mode (Acceleration Mode) refers to the operation mode of the servomotor 1 in the case of accelerating the model ship by towing the acceleration rope 17 (Fig. 3) connected to the model ship with the acceleration winch (3), the auxiliary thrust The propulsion supplying mode is an auxiliary thrust winch 4 of the servomotor 1 when the auxiliary thrust rope 18 (Fig. 3) connected to the load center load cell of the model ship is applied to the model ship. Refers to the operation mode.

The clutch 2 changes the gear to the acceleration winch 3 in the acceleration mode so that the servomotor 1 can operate the acceleration winch 3, and in the auxiliary thrust mode, the gear is changed to the auxiliary thrust winch 4 for the servo. The motor 1 causes the auxiliary thrust winch 4 to operate (FIG. 4).

The acceleration winch 3 accelerates the model ship by towing the acceleration rope 17 (FIG. 3) connected to the model ship.

The auxiliary thrust winch 4 applies the auxiliary thrust to the model ship by towing the auxiliary thrust rope 18 (FIG. 3) connected to the center load cell (FIG. 4) of the model ship.

The rope guide 6 has the shape of a hollow vertical rod, inside which an acceleration rope 17 (FIG. 3) and an auxiliary thrust rope 18 (FIG. 3) pass. The rope guide 6 guides the movement of each rope so that they do not get tangled with each other when the acceleration rope 17 (FIG. 3) and the auxiliary thrust rope 18 (FIG. 3) are loosened or wound.

The transverse rail (7) moves the servomotor (1), clutch (2), acceleration winch (3), auxiliary thrust winch (4), and rope guide (6) to the left and right to match the left and right positions of the model ship. To make it possible.

Clamping part

The clamping part is a module for fixing the model ship towed under the body 11 so as not to shake. The clamping part is composed of the main clamping control motors 9 and 10, the model rod posture fixing vertical rod 8, the front and rear moving rails 12, the auxiliary clamping control motors 13 and 14 (FIG. 3), and the like.

The main clamping control motors 9 and 10 are wound around the main clamping rope 19 (FIG. 3) connected to the model ship to maintain and fix the secondary attitude of the model ship (Main Clamping). The main clamping control motors 9 and 10 are a kind of geared motor. Geared motors that combine a motor unit that generates rotational power and a transmission unit that decelerates or speeds up the rotational power are mechanically increased or decelerated, so that the motor unit is in the most efficient state (speed range). It is useful to be able to drive in).

The model bar posture fixing vertical rod 8 is connected to the main clamping rope 19 (FIG. 3) and serves to pull the main clamping rope 19 (FIG. 3).

The front and rear movement rail 12 allows the tester to move the model rod posture fixing vertical rod 8 and the main clamping control motors 9 and 10 together back and forth to match the front and rear positions of the model ship.

The auxiliary clamping control motors 13 and 14 (FIG. 3) are wound around the auxiliary clamping rope 20 (FIG. 3) connected to the model ship to maintain and fix the primary posture of the model ship (Sub Clamping).

Control

The control unit is a module for controlling the operation of the motor for applying the auxiliary thrust to the model ship. The control unit includes a control driver box 15 and a remote controller 16.

The control driver box 15 is equipped with a motor driver and a controller, and mechanically controls the operation of the motor and the like (FIG. 4).

The remote controller 16 is composed of an industrial touch screen PC and an operation panel (FIG. 5), and remotely drives a towing vehicle. Therefore, according to the present invention, convenience is improved because the experimenter does not have to enter the towing tank and control the device (FIG. 4).

Operation procedure of the auxiliary thruster according to the present invention (test method using the auxiliary thruster according to the present invention), S100: clamping mode (Clamping Mode) → S200: acceleration mode (Acceleration Mode) → S300: maintenance mode (Steady) Mode) S400: the auxiliary thrust mode (Propulsion Supplying Mode) → S100: the same as the clamping mode (Clamping Mode) (Fig. 6).

Thus, the present invention is to improve the efficiency and safety of the free Hangzhou model test by including the clamping function, the acceleration function and the auxiliary thrust function in a sequence of all in one system. Hereinafter, the operation principle of each step will be described in detail.

S100: Clamping Mode

Clamping mode is a starting step of the free Hangzhou model test using the present invention, it is fixed so as not to shake the model ship towed under the body (11).

At this time, the length and clamping time of the model selection auxiliary clamping rope 20 (FIG. 3) and the main clamping rope 19 (FIG. 3) are set by performing pre-calibration.

The clamping mode is divided into 1) auxiliary clamping and 2) main clamping and proceeds step by step.

1) Sub Clamping

① Remote controller (16): The tester inputs the auxiliary clamping button on the remote controller (16).

② Control driver box (15): Operate the auxiliary clamping control motors (13, 14) (Fig. 3).

③ auxiliary clamping control motor (13, 14) (Fig. 3): winding the auxiliary clamping rope 20 (Fig. 3) connected to the model ship to maintain and fix the primary attitude of the model ship.

2) Main Clamping

① Remote controller (16): The tester inputs the main clamping button from the remote controller (16).

② Control driver box (15): Operate the main clamping control motors (9, 10).

③ Main clamping control motor (9, 10): Wind the main clamping rope (19) (Fig. 3) connected to the model ship to maintain and fix the secondary attitude of the model ship.

S200: Acceleration Mode

The acceleration mode is an operation mode of the servomotor 1 when the acceleration rope 17 (Fig. 3) connected to the model ship is accelerated by the acceleration winch 3 to accelerate the model ship. The operation principle of acceleration mode is as follows.

① Remote controller 16: The tester inputs the towing length and the acceleration time of the acceleration rope 17 (FIG. 3) from the remote controller 16.

② Control driver box (15): Operate the servo motor (1) in acceleration mode.

③ Clutch (2): Change the gear to the acceleration winch (3) to tow the acceleration rope 17 (Fig. 3) connected to the model ship.

④ Acceleration winch (3): Accelerate the model ship by towing the acceleration rope 17 (Fig. 3) connected to the model ship according to the operation of the servomotor (1).

S300: Steady Mode

In the maintenance mode, the speed of the model ship made through the acceleration mode is maintained for a certain time.

S400: Propulsion Supplying Mode

The auxiliary thrust mode is a servomotor (1) in the case of applying the auxiliary thrust to the model ship by towing the auxiliary thrust rope (18) (Fig. 3) connected to the load cell (Fig. 4) of the center of gravity of the model ship with the auxiliary thrust winch (4). The operating mode of. The principle of operation of the auxiliary thrust mode is as follows.

① Remote controller 16: The tester inputs the magnitude of the auxiliary thrust and the application time from the remote controller 16.

② Control driver box (15): Operate the servomotor (1) in auxiliary thrust mode.

③ Clutch (2): Change the gear to the auxiliary thrust winch (4) to tow the auxiliary thrust rope 18 (Fig. 3) connected to the model ship.

④ Auxiliary thrust winch (4): Towing the auxiliary thrust rope (18) (Fig. 3) connected to the load center load cell of the model ship according to the operation of the servomotor (1) to apply the auxiliary thrust to the model ship. At this time, since the auxiliary thrust rope 18 (FIG. 3) is connected to the center of gravity of the model ship, the resultant auxiliary thrust can be accurately applied to the center of gravity of the model ship. In addition, the servomotor 1 controls torque at any time in contrast to the tension applied to the auxiliary thrust rope 18 (FIG. 3) and the load cell value so that the correct value of the auxiliary thrust is automatically applied to the model ship.

S500: Model running point mode (Free Running Mode)

On the other hand, when the test is performed at the model ship port that does not require auxiliary thrust, the model ship is released from the auxiliary thrust device according to the present invention by releasing all the ropes without applying the auxiliary thrust at the same time as the acceleration of the model ship ends. You can keep it free.

The above description is merely illustrative of the technical idea of the present invention, and various modifications, changes, and substitutions may be made by those skilled in the art without departing from the essential characteristics of the present invention. will be. Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical spirit of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by the embodiments and the accompanying drawings. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

1 is an auxiliary thrust device (free surface) for a free Hangzhou model test according to the present invention.

Figure 2 is an auxiliary thrust device (free surface) for free Hangzhou model test according to the present invention.

3 is a coupling relationship between the auxiliary thrust device and the model ship for the free Hangzhou model test according to the present invention.

Figure 4 is a conceptual diagram of the auxiliary thrust device for a free Hangzhou model test according to the present invention.

5 is a conceptual diagram of a remote controller of the auxiliary thrust device for a free Hangzhou model test according to the present invention.

Figure 6 is an operation sequence of the auxiliary thrust device for a free Hangzhou model test according to the present invention.

Figure 7 is a photograph taken a test scene using the present invention.

8 is a photograph taken a test scene using the present invention.

<Description of Major Symbols in Drawing>

1: Servo motor 12: Front and rear movement rail

2: clutch 13, 14: auxiliary clamping control motor

3: acceleration winch 15: control driver box

4: auxiliary thrust winch 16: remote controller

6: rope guide 17: acceleration rope

7: transverse rail 18: auxiliary thrust rope

8: Vertical bar for fixing the model ship posture 19: Main clamping rope

9, 10: Main clamping control motor 20: Auxiliary clamping rope

11: body

Claims (15)

A body of a rectangular shape that extends forward and backward, which is attached to the lower surface of the towing tank; A thrust unit which is driven while mounted on the body and accelerates a model ship towed under the body or applies auxiliary thrust to the model ship; A clamping part for driving in a state mounted on the body to fix the model ship towed under the body so as not to shake; Control unit for controlling the operation of the motor for remotely driving the towing tank and applying the auxiliary thrust to the model ship Auxiliary thrust device for free Hangzhou model test including a. A body of a rectangular shape that extends forward and backward, which is attached to the lower surface of the towing tank; A thrust unit which is driven while mounted on the body and accelerates a model ship towed under the body or applies auxiliary thrust to the model ship; A clamping part for driving in a state mounted on the body to fix the model ship towed under the body so as not to shake; Remotely driven towing tank, including a control unit for controlling the operation of the motor for the application of the auxiliary thrust to the model ship, The thrust unit accelerates the model ship by operating the acceleration winch in the acceleration mode, and in the auxiliary thrust mode by operating the auxiliary thrust winch to apply the auxiliary thrust to the model ship, and in the acceleration mode by changing the gear to the acceleration winch servo motor In the thrust mode, the clutch changes the gear to the auxiliary thrust winch to allow the servomotor to operate the auxiliary thrust winch, the acceleration winch for accelerating the model ship by towing the acceleration rope connected to the model ship; The auxiliary thrust device for the free Hangzhou model test, characterized in that it comprises an auxiliary thrust winch for applying the auxiliary thrust to the model ship by towing the auxiliary thrust rope connected to the load cell of the model ship. The method of claim 2, Wherein the thrust portion auxiliary thruster for the free Hangzhou model test characterized in that it further comprises a rope guide for guiding the movement of each rope so that they do not get tangled with each other when loosening or winding the acceleration rope and the auxiliary thrust rope. The method of claim 3, wherein The thrust unit further comprises a lateral movement rail for allowing the servo motor, the clutch, the acceleration winch and the auxiliary thrust winch, and the rope guide to move left and right to fit the left and right positions of the model ship. Auxiliary thrust device. The method of claim 2, The load cell is an auxiliary thrust device for a free Hangzhou model test, characterized in that located in the center of gravity of the model ship. A body of a rectangular shape that extends forward and backward, which is attached to the lower surface of the towing tank; A thrust unit which is driven while mounted on the body and accelerates a model ship towed under the body or applies auxiliary thrust to the model ship; A clamping part for driving in a state mounted on the body to fix the model ship towed under the body so as not to shake; Remotely driven towing tank, including a control unit for controlling the operation of the motor for the application of the auxiliary thrust to the model ship, The clamping unit is a main clamping control motor for maintaining and fixing the secondary posture of the model ship by winding the main clamping rope connected to the model ship, and an auxiliary clamping control for maintaining and fixing the primary attitude of the model ship by winding the auxiliary clamping rope connected to the model ship. Auxiliary thruster for free Hangzhou model test, characterized in that it comprises a motor. The method of claim 6, The clamping unit is connected to the main clamping rope auxiliary thrust device for free Hangzhou model test, characterized in that it further comprises a vertical bar for fixing the posture of the model ship pulling the main clamping rope. The method of claim 7, wherein The clamping part further includes a vertical thrust rod for fastening the model ship posture and a front and rear movement rail for allowing the main clamping control motor to move back and forth to match the forward and backward positions of the model ship. . A body of a rectangular shape that extends forward and backward, which is attached to the lower surface of the towing tank; A thrust unit which is driven while mounted on the body and accelerates a model ship towed under the body or applies auxiliary thrust to the model ship; A clamping part for driving in a state mounted on the body to fix the model ship towed under the body so as not to shake; Remotely driven towing tank, including a control unit for controlling the operation of the motor for the application of the auxiliary thrust to the model ship, The control unit is equipped with a motor driver and a controller and consists of a control driver box for controlling the operation of the motor mechanically, an industrial touch screen PC and a control panel, and comprises a remote controller for remotely driving the towing vehicle. Auxiliary thruster for free Hangzhou model test, characterized in that. As a test method using the auxiliary thrust device for the free Hangzhou model test of any one of claims 2, 6 or 9. A clamping mode step of fixing the model ship towed under the body so as not to shake; An acceleration mode step of accelerating the model ship by towing an acceleration rope connected to the model ship with an acceleration winch; A maintenance mode step of maintaining the speed of the model ship made through the acceleration mode at a constant time; Auxiliary thrust mode step of applying an auxiliary thrust to the model ship by towing the auxiliary thrust rope connected to the load cell at the center of gravity of the model ship with the auxiliary thrust winch. Test method using auxiliary thrust device for free Hangzhou model test including a. 11. The method of claim 10, The clamping mode step is divided into an auxiliary clamping step and the main clamping step to proceed in order, In the auxiliary clamping step, the tester inputs the auxiliary clamping button on the remote controller, the control driver box operates the auxiliary clamping control motor, and the auxiliary clamping control motor is wound around the auxiliary clamping rope connected to the model ship. It consists of maintaining and fixing the vehicle posture, In the main clamping step, the tester inputs the main clamping button on the remote controller, the control driver box operates the main clamping control motor, and the main clamping control motor is wound around the main clamping rope connected to the model ship. The test method using the auxiliary thrust device for the free Hangzhou model test, characterized in that the step of maintaining and fixing the vehicle posture. 11. The method of claim 10, The acceleration mode step, The tester inputs the towing length and acceleration time input of the acceleration rope in the remote controller, the control driver box operates the servo motor in the acceleration mode, and the clutch accelerates to tow the acceleration rope connected to the model ship. Using the auxiliary thrust device for the free hang model test, comprising the steps of changing the gear to the winch, and the acceleration winch to accelerate the model ship by towing the acceleration rope connected to the model ship according to the operation of the servomotor. Test Methods. 11. The method of claim 10, The auxiliary thrust mode step, The tester inputs the size and the application time of the auxiliary thrust in the remote controller, the control driver box operates the servomotor in the auxiliary thrust mode, and the auxiliary thrust winch for towing the auxiliary thrust rope connected to the model ship. Free-hanging model test, comprising the steps of changing the gears, and applying the auxiliary thrust to the model ship by towing the auxiliary thrust rope connected to the load cell at the center of gravity of the model ship according to the operation of the servomotor. Test method using auxiliary thrust device for. The method of claim 13, Servo motor is a test method using an auxiliary thrust device for free-hang model testing, characterized in that the torque is controlled from time to time in contrast to the tension and load cell value applied to the auxiliary thrust rope. 11. The method of claim 10, When the test is carried out at a model ship port that does not require auxiliary thrust, the model ship is released from the auxiliary thrust device by releasing all the ropes without entering the auxiliary thrust mode at the same time as the acceleration of the model ship ends. A test method using an auxiliary thrust device for the free Hangzhou model test, characterized in that entering the model ship port mode step to maintain as possible.

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