KR20150028434A - System and method for evaluating performance of dynamic positioning system - Google Patents

Abstract

The present invention relates to a system and a method for evaluating performance of a dynamic positioning system (DPS) capable of evaluating performance of a position maintaining system to control a position of a ship by performing a simulation of the worst possible environment condition. According to an embodiment of the present invention, the system for evaluating the performance of the DPS comprises: a first simulator capable of copying the external force of an environment; a second simulator capable of copying a motion of a ship; and a DPS system to provide a propulsion control signal to a propulsion unit in order to enable the ship to keep a predetermined range by generating the propulsion control signal based on the external force of the environment and the motion information of the ship received from the first and second simulators. The DPS system evaluates that the position information of the ship, which responds to the propulsion control signal, is maintained within the predetermined range.

Description

[0001] SYSTEM AND METHOD FOR EVALUATING PERFORMANCE OF DPS [0002]

The present invention relates to a system and method for evaluating the performance of a DPS, and more particularly to a system and method for evaluating performance of a DPS capable of evaluating the performance of a position maintenance system for controlling the position of a ship by performing simulation under worst- .

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

Recently, along with the development of oil exploration technology on the seabed, large oil companies have felt the necessity of drilling rig with drilling facilities suitable for development of marginal field or deep sea oil field, It is a reality that is actively searching for development.

Floating structures such as floating production storage offloading (FPSO) and drill ship capable of refining and storing oil and gas existing in the underground of the ocean are gradually increasing. Because of the characteristics of these floating structures, it is possible to develop safer oilfields with less fluctuation due to algae, wind direction, wind speed, and position change. The time and maneuverability required for moving to a place are as short as possible and as simple as possible. At this time, the change of the position due to the swinging of the ship due to the currents, wind direction, wind speed, and wave height can be solved by the Dynamic Positioning System (DPS) of the floating structure.

However, such a DPS is basically designed assuming the worst environmental conditions. We can not test the best performance of the DPS because the worst environmental conditions can not be made during commissioning.

Failure to test the maximum performance can lead to failure of the performance when encountering the worst environmental conditions, leading to accident and sinking of the ship.

Therefore, it is necessary to test the performance of the DPS to verify the performance of the DPS.

It is an object of the present invention to provide a system and method for evaluating the performance of a DPS capable of evaluating the performance of a position maintaining system for performing a simulation under worst environmental conditions to control the position of a ship.

According to an aspect of the present invention, there is provided a computer system including a first simulator capable of simulating an environmental external force; A second simulator capable of simulating movement of the ship; And a DPS system for generating a thrust control signal so that the ship does not deviate from a predetermined range based on the environmental external force information received from the first and second simulators and the motion information of the ship and providing the thrust control signal to the thrust unit, The system evaluates whether the position information of the ship in response to the thrust control signal is maintained within the predetermined range.

Wherein the first simulator provides the DPS system with a value simulating at least one of wind, algae, waves and ice sheets corresponding to the worst environmental conditions, and the second simulator provides a value simulating at least one of wind, It is preferable to provide the DPS system with a value that simulates at least one of the linear motion and the rotational motion of the ship corresponding to the motion.

And the first and second simulators each include a converter for converting signals corresponding to the environment information and the movement information of the ship into the DPS system.

Preferably, the first and second simulators are communicably connected to the DPS system via a communication unit.

According to another embodiment of the present invention, there is provided a method of evaluating the performance of a DPS system for controlling the position of a ship in sea, the method comprising: receiving numerical values simulating environmental external forces; Receiving a numerical value simulating movement of the ship; Generating a thrust control signal such that the ship does not deviate from a predetermined range based on the received environmental information and an electric signal corresponding to movement information of the ship; And evaluating whether the position information of the ship in response to the generated thrust control signal maintains the predetermined range.

Wherein the environmental external force includes a value simulating at least one of wind, algae, waves, and ice sheets corresponding to the worst environmental conditions, and the movement of the ship includes a ship corresponding to the movement of the ship corresponding to the worst- And a numerical value simulating at least one of a linear motion and a rotational motion.

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

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

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

Referring to FIG. 1, the performance evaluation system of the DPS according to the embodiment of the present invention can evaluate the performance of the location maintenance system under the worst environmental conditions.

The performance evaluation system of the DPS according to the embodiment of the present invention includes the first and second simulators 10 and 20 and the DPS 40 communicably connected to the first and second simulators 10 and 20 do. At this time, a communication unit 30 is located between the first and second simulators 10 and 20 and the DPS 40. The communication unit 30 can transmit the environmental conditions simulated by the first simulator 10 to the DPS 40 and the movement of the ship simulating the second simulator 20 to the DPS 40. [ The communication unit 30 may be a cable.

The first and second simulators 10 and 20 have converters 11 and 21, respectively. The converters 11 and 21 provided in the first and second simulators 10 and 20 convert an electronic signal transmitted to the DPS 40 into an electric signal form. The electric signals converted by the converters 11 and 21 are transmitted to the DPS 40. [

The first simulator 10 delivers a value to the DPS 40 that can simulate the worst environmental conditions. Numerical values capable of simulating the worst environmental conditions are at least one of wind, algae, waves and wind loads, and numerical values can be expressed in terms of intensity or size.

For example, the worst environmental external force may be 50m / sec wind speed and 8m deep.

The second simulator 20 transmits to the DPS 40 a numerical value capable of simulating the motion condition of the ship. The numerical values that can simulate the ship's motion conditions include linear motion in the fore and aft direction, ie, longitudinal motion, linear motion in the width direction, linear motion in the vertical direction, rotational motion in the longitudinal direction, At least one of a motion and a rotational motion in a vertical direction, and the numerical value may be expressed by an angle, a size, or the like.

The DPS 40 performs simulation based on the environmental external force information received from the first and second simulators 10 and 20 and the movement information of the ship. The DPS 40 can simulate the DPS performance under the worst environmental conditions through the numerical values simulating the worst environmental external force information and the ship movement information.

More specifically, the DPS 40 generates a thrust control signal so that the ship maintains a predetermined range based on the environmental external force information received from the first and second simulators 10 and 20 and the movement information of the ship, Simulation is performed to control the position of the ship according to the signal.

At this time, the DPS 40 includes a position measuring unit 41 for measuring the position of the ship, environmental external force information received from the first and second simulators 10 and 20, To the thrust section 43, which operates under the control of the controller 42 and the controller 42, which generate the thrust control signal so as not to exceed the predetermined range. The thrust section 43 includes at least one of a thruster, a propeller, and a rudder. The thruster maintains the position of the ship in the left and right direction, the propeller maintains the position in the forward and backward direction of the ship, and the rudder adjusts the direction of rotation of the ship. The thruster is installed on the bottom of the ship and can be installed in the bow and stern direction. A plurality of thrusters may be installed in the fore and aft direction.

The thrust section 43 controls the position of the ship in accordance with 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 position information of the received ship is maintained within a predetermined range. That is, when the position information of the ship is within a predetermined range, the controller 42 evaluates that the highest performance is maintained under the worst environmental conditions, and if the position information of the ship is out of the predetermined range, the ship has departed from the predetermined position Ali provides notification information. Therefore, it is possible to test the performance of the DPS under the worst environmental conditions to minimize the risk of ship sinking or fire even if the worst environmental conditions are encountered during commissioning.

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

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

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

The controller 42 receives the movement information of the ship provided from the second simulator 20 included in the performance evaluation system of the DPS (S13). Here, the movement information of the ship is a numerical value simulating at least one of a linear motion and a rotary motion of the ship.

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 the step S11 described above (S15). Here, the thrust control signal is generated on the basis of the environmental external force information. However, the present invention is not necessarily limited to this. The thrust control signal corresponding to the manual input, that is, You may. Accordingly, the educator who is trained by the DPS according to the environmental condition can recognize the thrust output amount to be provided to the thrust section 43.

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

Thereafter, the controller 42 receives the position information of the ship measured by the position measuring unit 41, based on the position of the ship 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 position information of the received ship (S21).

If it is determined in step S21 that the ship is out of the predetermined range, the controller 23 provides notification information indicating that the ship is out of the predetermined range (S22). The alert information may be a warning sound, a warning message, a blinking light, or a combination thereof.

If it is determined in step S21 that the ship is within the predetermined range, the controller 42 determines the performance of the DPS as the highest performance (S23). At this time, the controller 42 can provide notification information indicating that the performance of the DPS is the highest.

Therefore, the performance of the DPS can be tested in the worst environmental conditions that are difficult to meet during commissioning. Through such tests, the educator who is trained in DPS can experience the performance of DPS by various environmental conditions.

The invention being thus described, it will be obvious that the same way may be varied in many ways. Such modifications are intended to be within the spirit and scope of the invention as defined by the appended claims.

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

Claims (6)

A first simulator capable of simulating environmental external forces;
A second simulator capable of simulating movement of the ship; And
And a DPS system for generating a thrust control signal so that the ship does not deviate from a predetermined range based on the environmental external force information received from the first and second simulators and the movement information of the ship and providing the thrust control signal to the thrust unit,
Wherein the DPS system evaluates whether the position information of the ship in response to the thrust control signal is maintained within the predetermined range. The method according to claim 1,
Wherein the first simulator provides the DPS system with a value that simulates at least one of wind, algae, waves and ice sheets corresponding to worst environmental conditions,
Wherein the second simulator provides the DPS system with a value that simulates at least one of a linear motion and a rotational motion of a ship corresponding to a motion of the ship corresponding to a worst case motion condition. The method according to claim 1 or 2,
Wherein the first and second simulators each include a converter for converting a signal corresponding to the environment information and the movement information of the ship into the DPS system. The method according to claim 1,
Wherein the first simulator and the second simulator are communicably connected to the DPS system via a communication unit. A method for evaluating the performance of a DPS system for controlling the position of a vessel in the sea,
Receiving a numerical value simulating environmental external force;
Receiving a numerical value simulating movement of the ship;
Generating a thrust control signal such that the ship does not deviate from a predetermined range based on the received environmental information and an electric signal corresponding to movement information of the ship; And
And evaluating whether the position information of the ship in response to the generated thrust control signal maintains the predetermined range. The method of claim 5,
The environmental external force includes a value simulating at least one of wind, algae, waves and ice sheets corresponding to the worst environmental conditions,
Wherein the movement of the ship includes a value simulating at least one of a linear movement and a rotation movement of the ship corresponding to the movement of the ship corresponding to the worst movement condition.

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