KR102160478B1 - System and method for evaluating performance of dynamic positioning system - Google Patents

Abstract

The present invention relates to a DPS performance evaluation system and method capable of evaluating the performance of a positioning system that controls the position of a ship by performing a simulation under the worst environmental conditions.
According to an embodiment of the present invention, a first simulator capable of simulating an external force of the environment; A second simulator capable of simulating the motion of the ship; And a DPS system for generating and providing a thrust control signal to the thrust unit so that the ship does not deviate from a predetermined range based on the environmental external force information and the ship's motion information received from the first and second simulators, wherein the DPS system Is braking the performance evaluation system of the DPS, characterized in that it evaluates whether the position information of the ship responsive to the thrust control signal is maintained within the predetermined range.

Description

DPS performance evaluation system and method {SYSTEM AND METHOD FOR EVALUATING PERFORMANCE OF DYNAMIC POSITIONING SYSTEM}

The present invention relates to a DPS performance evaluation system and method, and more particularly, to a DPS performance evaluation system and method capable of evaluating the performance of a positioning system that controls the position of a ship by performing a simulation under the worst environmental conditions. About.

In recent years, due to the rapid industrialization and industrial development trend internationally, limited global resources are gradually falling out, and the stable production and supply of crude oil has become a very important issue.

Therefore, in recent years, with the development of petroleum mining technology on the seabed, large petroleum companies are desperately feeling the need for drilling vessels equipped with drilling facilities suitable for the development of small marginal fields or deep-sea oil fields that have so far lost economic feasibility. It is a reality that is actively seeking development for this.

Floating offshore structures such as FPSO (Floating Production Storage Offloading) and drillships that can purify and store oil or gas existing underground in the ocean are gradually increasing. Because these floating offshore structures perform a long time at a certain location due to their characteristics, the less shaking or location change due to tide, wind direction and wind speed, the safer oilfield development can be achieved, and at one location where drilling work is completed, another The shorter and simpler the time and operability it takes to move to the place, the better. At this time, the phenomenon in which the position is changed due to the hull shaking due to the current, wind direction, wind speed, and wave height can be solved by a dynamic positioning system (hereinafter referred to as'DPS') of a floating offshore structure.

However, such a DPS is basically designed assuming the worst environmental conditions. During commissioning, the worst environmental conditions cannot be created, so the best performance of the DPS cannot be tested.

Failure to test the maximum performance can lead to an accident and sinking of the ship, as the performance cannot be achieved when the worst environmental conditions are met.

Therefore, it is necessary to verify the performance of the DPS by testing the highest performance of the DPS.

It is an object of the present invention to provide a DPS performance evaluation system and method capable of evaluating the performance of a positioning system that controls the position of a ship by performing a simulation under the worst environmental conditions.

According to an embodiment of the present invention for achieving the above object, a first simulator capable of simulating an external force of the environment; A second simulator capable of simulating the motion of the ship; And a DPS system for generating and providing a thrust control signal to the thrust unit so that the ship does not deviate from a predetermined range based on the environmental external force information and the ship's motion information received from the first and second simulators, wherein the DPS system Provides a DPS performance evaluation system, characterized in that it evaluates whether the position information of the ship responsive to the thrust control signal is maintained within the predetermined range.

The first simulator provides the DPS system with a numerical value that simulates at least one of wind, tide, waves, and glaciers corresponding to the worst environmental conditions, and the second simulator is the ship corresponding to the worst motion condition. It is preferable to provide the DPS system with a numerical value that simulates at least one of a linear motion and a rotational motion of a ship corresponding to the motion.

It is preferable that the first and second simulators each include converters for converting signals corresponding to the environmental information and the motion information of the ship to suit the DPS system.

It is preferable that the first and second simulators are communicatively connected to the DPS system by a communication unit.

In addition, according to another embodiment of the present invention, a method for evaluating a performance of a DPS system for controlling a position of a ship at sea, comprising: receiving a numerical value that simulates an external force of the environment; Receiving a numerical value that simulates the motion of the ship; Generating a thrust control signal so that the ship does not deviate from a predetermined range based on the received environmental information and an electric signal corresponding to the ship's motion information; And evaluating whether the position information of the ship responsive to the generated thrust control signal maintains the predetermined range.

The external environmental force includes a numerical value that simulates at least one of wind, current, waves, and ice sheets corresponding to the worst environmental conditions, and the movement of the ship corresponds to the movement of the ship corresponding to the worst movement condition. It is preferable to include a numerical value that simulates at least one of linear motion and rotational motion.

According to an embodiment of the present invention, it is possible to evaluate the performance of a position maintenance system that controls the position of a ship by performing a simulation under the worst environmental conditions.

1 is a block diagram for explaining a DPS performance evaluation system according to an embodiment of the present invention, and
2 is a flowchart illustrating a DPS performance evaluation method using the DPS performance evaluation system according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram illustrating a DPS performance evaluation system according to an embodiment of the present invention.

Referring to FIG. 1, the performance evaluation system of a DPS according to an embodiment of the present invention can evaluate the performance of the position maintenance system under the worst environmental condition.

The DPS performance evaluation system according to an embodiment of the present invention includes first and second simulators 10 and 20, and a DPS 40 that is communicatively connected to the first and second simulators 10 and 20. do. At this time, a communication unit 30 is positioned between the first and second simulators 10 and 20 and the DPS 40. An environmental condition simulated by the first simulator 10 may be transmitted to the DPS 40 by the communication unit 30 and the motion of a ship simulated by the second simulator 20 may be transmitted to the DPS 40. The communication unit 30 may be a cable.

The first and second simulators 10 and 20 are provided with transducers 11 and 21, respectively. The converters 11 and 21 provided in the first and second simulators 10 and 20 convert the electronic signal transmitted to the DPS 40 into an electrical signal form. The electric signal converted through the converters 11 and 21 is transmitted to the DPS 40.

The first simulator 10 transmits a value capable of simulating the worst environmental condition to the DPS 40. The numerical value that can simulate the worst environmental conditions is at least one of wind, current, wave, and wind load, and the numerical value may be expressed as intensity or size.

For example, the worst environmental external force may be a wind speed of 50 m/sec and a wave height of 8 m.

The second simulator 20 transmits a numerical value capable of simulating the motion conditions of the ship to the DPS 40. Numerical values that can simulate the motion conditions of a ship are linear motions moving in the fore or stern direction, that is, in the longitudinal direction, linear motions moving in the width direction, linear motions moving in the vertical direction, rotational motion in the longitudinal direction, and rotation in the forward and backward directions At least one of a motion and a rotational motion in a vertical direction, and the value may be expressed as an angle or a size.

The DPS 40 performs a simulation based on the environmental external force information and the ship's motion information received from the first and second simulators 10 and 20. In the DPS 40, the DPS performance in the worst environmental conditions can be simulated through numerical values that simulate the worst environmental external force information and the ship's motion information.

In more detail, the DPS 40 generates a thrust control signal so that the ship maintains a predetermined range based on the environmental external force information and the ship's motion information received from the first and second simulators 10 and 20 and controls the generated thrust. Perform a simulation to control the ship's position according to the signal.

At this time, the DPS 40 is based on the electric signal corresponding to the external force information and the motion information of the ship received from the position measuring unit 41 that measures the position of the ship, the first and second simulators (10, 20). It is provided to the controller 42 for generating a thrust control signal so as not to deviate from this predetermined range and the thrust unit 43 operating under the control of the controller 42. The thrust unit 43 includes at least one of a thruster, a propeller, and a rudder. The thruster maintains the position in the left and right direction of the ship, the propeller maintains the position in the forward and backward direction of the ship, and the rudder adjusts the rotation direction of the ship. The thruster is installed at the bottom of the ship and can be installed in the fore and aft directions. A plurality of thrusters may be installed in the fore and aft directions.

The thrust unit 43 controls the position of the ship according to the thrust control signal generated by the controller 42.

The controller 42 receives the position information of the ship from the position measuring unit 41 that measures the position of the ship, and evaluates whether the received position information of the ship remains within a predetermined range. That is, the controller 42 evaluates that the ship's position information is within a predetermined range, and that the best performance is maintained in the worst environmental condition, and when the ship's position information is out of the predetermined range, the ship has deviated from the predetermined position. Provide notification information to inform. Accordingly, it is possible to test the performance of the DPS under the worst environmental conditions and minimize the risk of sinking or fire of the ship even if the worst environmental conditions are encountered during trial operation.

The DPS performance evaluation method using the DPS performance evaluation system having such a configuration will be described with reference to FIG. 2 as follows.

FIG. 2 is a flowchart illustrating a method of evaluating DPS performance using the DPS performance evaluation system according to an embodiment of the present invention.

Referring to FIG. 2, environmental external force information provided from the first simulator 10 included in the DPS performance evaluation system is received by the controller 42 of the DPS 4 included in the DPS performance evaluation system (S11). At this time, the environmental external force information is a numerical value that can simulate the worst environmental conditions, and is a numerical value indicating the actual effect on the ship. For example, environmental condition information is a numerical value that simulates at least one of wind, tide, waves, and glaciers.

The motion information of the ship provided from the second simulator 20 included in the performance evaluation system of DPS is received by the controller 42 (S13). Here, the ship's motion information is a numerical value that simulates at least one of the ship's linear motion and rotational motion.

The controller 42 generates a thrust control signal for controlling the position of the ship by providing an opposite reaction force based on the environmental external force information simulated in step S11 described above (S15). Here, it is described as generating a thrust control signal based on external force information, but the present invention is not necessarily limited thereto, and a manual input, that is, a thrust control signal corresponding to the directly input value, is output to the thrust unit 43 You may. Accordingly, an educator trained in DPS for each environmental condition can recognize the amount of thrust output to be provided to the thrust unit 43.

The controller 42 outputs the generated thrust control signal to the thrust unit 43 (S17).

Thereafter, the controller 42 receives the position information of the vessel measured from the position measuring unit 41 of the position of the vessel operating under the control of the thrust unit 43 (S19).

The controller 42 determines whether the ship is within a predetermined range based on the received position information of the ship (S21).

As a result of the determination in step S21, when the ship is out of the predetermined range, the controller 23 provides notification information indicating that the position of the ship is out of the predetermined range (S22). At this time, the notification information may be a warning sound, a warning message, a flashing light, and a combination thereof.

As a result of the determination in step S21, when the ship is within a predetermined range, the controller 42 determines the performance of the DPS as the highest performance (S23). At this time, the controller 42 may provide notification information indicating that the performance of the DPS is the highest performance.

Therefore, it is possible to test the performance of the DPS in the worst environmental conditions that are difficult to meet during commissioning. Through such a test, an educator trained in DPS can experience the performance of DPS in various environmental conditions.

The present invention is not limited by the above-described embodiments, and various modifications and changes may be made by those skilled in the art, which are included in the spirit and scope of the present invention defined in the appended claims.

10: first simulator 20: second simulator
30: communication unit 40: DPS
41: position measuring unit 42: controller
43: thrust part

Claims (6)

A first simulator capable of simulating an external force of the environment;
A second simulator capable of simulating the motion of the ship; And
And a DPS system that generates a thrust control signal so that the ship does not deviate from a predetermined range based on the environmental external force information and the ship's motion information received from the first and second simulators and provides it to the thrust unit;
The first simulator provides the DPS system with a numerical value that simulates at least one of wind, tide, waves, and glaciers corresponding to the worst environmental conditions;
The second simulator provides the DPS system with a numerical value that simulates at least one of a linear motion and a rotational motion of the ship corresponding to a worst motion condition;
Each of the first and second simulators includes converters for converting an electronic signal into an electric signal form suitable for the DPS system for a signal corresponding to the environmental external force information and the motion information of the ship;
The DPS system evaluates whether the position information of the ship responsive to the thrust control signal is maintained within the predetermined range;
When the position information of the ship is out of a predetermined range, a notification information indicating that the ship has deviated from a predetermined position is provided. delete delete The method according to claim 1,
The first and second simulators are DPS performance evaluation system, characterized in that communicatively connected to the DPS system and the communication unit. As a method for evaluating the performance of a DPS system that controls the position of a ship at sea,
Receiving a value that simulates an external force of the environment;
Receiving a numerical value that simulates the motion of the ship;
Generating a thrust control signal so that the received signal corresponding to the external force of the environment and the motion information of the ship is converted into an electrical signal through a converter, and the ship does not deviate from a predetermined range based on the electrical signal;
Evaluating whether the position information of the ship responsive to the generated thrust control signal maintains the predetermined range; And
As a result of the determination in the step of evaluating whether the predetermined range is maintained, when the ship is out of the predetermined range, notification information notifying that the position of the ship is out of the predetermined range is provided, and when the ship is within the predetermined range, the DPS Determining the performance as the highest performance and providing notification information indicating that the DPS is the highest performance;
The external environmental force includes a numerical value that simulates at least one of wind, tide, waves, and glaciers corresponding to the worst environmental conditions, and the motion of the ship is among the linear and rotational motions of the ship corresponding to the worst motion condition. A method for evaluating the performance of DPS, comprising: a numerical value that simulates at least one. delete

Images