KR100516851B1 - System and method for evaluating ship's synthetic seakeeping performance - Google Patents

Abstract

The present invention relates to a system and method for evaluating a comprehensive ship performance of a ship.

To this end, the present invention is installed on a vessel, the vertical acceleration measuring instrument for measuring the acceleration in the vertical direction generated by the movement of the hull, and the vertical acceleration measuring instrument after the vertical acceleration measuring the vertical acceleration measured by the vertical acceleration measuring instrument The computer includes a computer that calculates a variance of up and down acceleration received by the transmission, and calculates a comprehensive navigation performance index that evaluates the navigational safety of the ship by using the calculated variance and the loading condition and the sea condition input from the operator. In addition, a predetermined program for evaluating the ship's in-vehicle performance is installed.In order to zero the up / down acceleration, the up / down accelerometer is initialized, and then the dispersion value is calculated based on the up / down acceleration received from the up / down accelerometer, and the calculated dispersion Values for up and down acceleration using the Calculate the relative risk of the ship's performance evaluation factor, calculate the conversion estimate of each ship's performance evaluation factor and its marginal estimate using the calculated relative risk, and then calculate the combined ratio as the ratio of the marginal estimate to the calculated conversion estimate. The navigation safety evaluation chart and the navigation safety chart are displayed on the monitor image processing space based on the weather resistance performance index.

Description

System and method for evaluating ship's overall seaworthiness performance {SYSTEM AND METHOD FOR EVALUATING SHIP'S SYNTHETIC SEAKEEPING PERFORMANCE}

The present invention relates to a system and method for evaluating a ship's overall seaworthiness performance, and quantified by evaluating the vertical acceleration generated by the movement of the hull from the vertical acceleration measuring device, and providing a signal for the measured vertical acceleration to the computer. The present invention relates to a system and method for evaluating the ship's ship performance, which allows the ship's overall ship performance to be assessed with only the up and down acceleration of the ship.

In general, a method of evaluating the sailing safety of a ship sailing in the blue is to use the sailing performance.

This ship performance is not limited to the safety of the crew and to the function and performance of the ship's hull, regardless of the sea conditions, when a vessel assigned to a mission is sailing a scheduled sailing route or sea area. Man-machine system, defined as the performance required to perform, is not just a ship's inherent wave performance, but consists of a crew member, hull and onboard equipment (e.g., navigational equipment, propulsion engines, etc.). It is the performance in the blue of the ship as).

Therefore, the ship's ship performance evaluation is based on how the function and performance of the ship's hull-propeller-main engine sub-system are affected by wind, blue, etc. in a ship system in which the crew, hull and onboard equipment are organically combined and sailing in blue. Evaluate

However, the existing resistance performance evaluation factors have different probabilities of marginal occurrence. Therefore, in order to evaluate the resistance performance of the entire ship, it is necessary to measure the resistance performance evaluation factors through sensors installed in all the resistance performance evaluation elements. To this end, it is impossible to install a sensor for measuring all the resistance performance evaluation elements, and in terms of economics, there are many problems in practical use due to the excessive cost.

The present invention has been made to solve the above problems, the object is to receive the hull vertical acceleration measured from the vertical acceleration measuring device installed by installing a vertical acceleration measuring instrument that can measure the vertical acceleration of the hull in the vessel the vertical acceleration It is to provide a ship performance evaluation system and method for evaluating the ship's overall ship performance by receiving the variance calculated based on this and the loading condition and the sea condition of the ship.

In addition, the present invention provides a ship navigational safety evaluation degree and a ship navigation safety progress in the image processing space of the monitor on the basis of the sea conditions and measured up and down acceleration in the actual sea to easily determine the ship operator visually To provide a system and method for evaluating the resistance performance.

In order to achieve the above object, the ship's overall shipboard performance evaluation system according to an aspect of the present invention includes a vertical acceleration measuring device installed on the vessel and measuring acceleration in the vertical direction generated by the movement of the hull, and the vertical acceleration measuring device. After initializing the, calculate the dispersion value of the vertical acceleration by receiving the acceleration in the vertical direction measured by the vertical acceleration meter, and use the calculated dispersion value and the loading state and the sea condition input from the operator to improve the navigational safety of the ship. Comprising a computer for calculating the comprehensive sailing performance index to be evaluated, the computer is equipped with a predetermined program for evaluating the ship's sailing performance, and initializes the vertical acceleration measuring instrument to adjust the zero acceleration of the vertical acceleration and then the upper and lower Dispersion value is calculated based on the vertical acceleration received from the accelerometer, and the calculated minutes Calculate the relative risk of each ship performance evaluation factor for up / down acceleration using the estimated value and the loading condition and the sea condition, and calculate the conversion evaluation value of each ship performance evaluation factor and its limit estimate using the calculated relative risk. The navigation safety evaluation chart and the navigation safety progress chart are displayed on the monitor image processing space on the basis of the comprehensive sailing performance index calculated by the ratio of the limit evaluation value to the calculated conversion evaluation value.

Preferably, the vertical acceleration measuring device, a power supply for converting to a predetermined voltage level by receiving power from the outside when the power on / off switch is powered on; Vertical acceleration sensor for sensing the vertical acceleration generated according to the degree of ductility of the six degrees of freedom of the hull; A terminal block configured to supply a predetermined voltage applied through the power supply device to the vertical acceleration sensor, and to be connected to the outside to transmit a signal for vertical acceleration detected through the vertical acceleration sensor; And a vessel acceleration value connected to the terminal block to convert a signal for up and down acceleration detected by the up and down acceleration sensor into a digital signal, based on the signal for up and down acceleration from a computer receiving the converted signal. It characterized in that it comprises an A / D converter to be calculated.

In accordance with another aspect of the present invention, a method for evaluating a ship's overall sailing performance includes: (a) initializing an up and down accelerometer for zero adjustment of up and down acceleration; (b) receiving the signal for the up and down acceleration of the vessel detected from the up and down accelerometer initialized in step (a) for a predetermined time and calculating a dispersion value of the up and down acceleration when the predetermined time is reached; (c) receiving a loading condition and a sea condition of the ship from the operator; (d) the navigational safety of the ship using the variance value calculated in step (b) and the conversion evaluation value of each ship performance evaluation factor calculated based on the loading condition and the sea condition of the ship inputted in step (c) Calculating a comprehensive resistance performance indicator to evaluate the; And (e) displaying the navigation safety evaluation chart and the navigation safety progress chart on the image processing space of the monitor based on the comprehensive navigation performance index calculated through step (d).

Preferably, the step (d) is to calculate the relative risk of each resistance performance factor against the up and down acceleration, and using the calculated relative risk, the conversion evaluation value and the limit evaluation value of each resistance performance factor It is characterized in that the composite sailing performance index is calculated.

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

The present invention below provides a system and method for evaluating the ship's overall resistance performance based on the up and down acceleration of the hull measured by the up and down accelerometer installed on the vessel and the load resistance and sea conditions input from the operator It will be described as a preferred embodiment, but the technical idea of the present invention is not limited to this, but can be variously modified and implemented by those skilled in the art.

Referring to Figures 1 to 5 with respect to the system and method for evaluating a comprehensive ship performance performance of a ship according to an embodiment of the present invention.

1 is a block diagram for explaining the overall configuration of the ship's overall resistance performance evaluation system according to an embodiment of the present invention, Figure 2 is a view for explaining the vertical acceleration measuring device of Figure 1, Figure 3 is a view of the present invention FIG. 4 is a flowchart illustrating a method for evaluating a comprehensive sailing performance of a ship according to an embodiment, FIG. 4 is a flowchart illustrating in detail the up-down acceleration calculation subroutine of FIG. 3, and FIG. 5 is related to the relative risk calculation of FIG. 3. An operation flowchart for explaining the subroutine in detail.

Referring to Figure 1 with respect to the overall ship performance evaluation system of the ship according to an embodiment of the present invention, the ship performance evaluation system converts the up and down acceleration measured by the up and down acceleration measuring device 10 installed in the ship into a digital signal Then, by providing the converted digital signal to the computer 20, the vertical acceleration dispersion value of the hull calculated on the basis of the signal for the vertical acceleration detected by the vertical acceleration measuring instrument 10, the loading state and the sea input from the operator Conditions are used to display the navigational safety of the ship on the screen.

The vertical acceleration measuring instrument 10 will be described with reference to FIG. 2. The vertical acceleration measuring instrument 10 includes a power supply unit 11, a power on / off switch 12, an vertical acceleration sensor 13, and a terminal block 14. ) And an A / D converter 15 and the like. At this time, the vertical acceleration measuring instrument 10 is installed on the vessel to measure the vertical acceleration in the actual sea.

The power supply unit 11 supplies a predetermined voltage level when a voltage (for example, AC 85-264V) applied from the outside is supplied while the power on / off switch 12 is powered on. For example, DC To 5V and the like to supply the vertical acceleration sensor 13 to be described later.

The vertical acceleration sensor 13 receives a predetermined voltage converted through the power on / off switch 12, and then detects the vertical acceleration generated according to the degree of flexibility of the six degrees of freedom of the hull.

Then, the terminal block 14 serves as a terminal for supplying a predetermined voltage to the vertical acceleration sensor 13 through the power supply unit 11 while the power on / off switch 12 is powered on.

In addition, the terminal block 14 serves as a terminal to be connected to the A / D converter 15 to be described later in order to transmit a signal for the up and down acceleration sensed through the up and down acceleration sensor 13.

The A / D converter 15 is connected to the terminal block 14, converts the signal for the up and down acceleration detected by the up and down acceleration sensor 13 into a digital signal, and then the converted digital signal to be described later To computer 20.

Then, the computer 20 allows the vertical acceleration average value and the dispersion value of the vessel to be calculated based on the signal for the vertical acceleration transmitted through the A / D converter 15. At this time, the overall resistance performance of the ship can be evaluated by the calculated average acceleration and dispersion value of the vessel.

First, the computer 20 performs an initialization (zero adjustment of vertical acceleration) of the vertical accelerometer 10 using a configuration file (CFG file), and when initialization is completed, inputs a file to store the vertical acceleration. The digital input signal of the up-down acceleration, which is converted through the A / D converter 15, is converted into a value corresponding to the gravitational acceleration by a pre-input scale measurement value, and the time-series data on the monitor screen as shown in FIG. To be displayed as.

In addition, the computer 20 continues the measurement when the input signal of the up-down acceleration on the monitor 30 screen is zero pointed, and the measurement is completed when the measurement time reaches a predetermined time (for example, 10 minutes). do. At this time, the measurement interval of the vertical acceleration signal is preferably 100 msec.

Thereafter, the computer 20 calculates an average value and a dispersion value of the vertical acceleration by using a predetermined program capable of statistically processing the vertical acceleration (for example, the vertical acceleration statistical processing program), and the measurement time of the vertical acceleration. When the acceleration value for each time is stored in the file, the variance of the vertical acceleration measured as the entry performance evaluation input item is automatically input as shown in FIG. 7.

Here, the ship operator inputs an input device (e.g., a keyboard, a mouse, etc.) such as a ship's loading state and a current maritime condition (e.g., a head wind direction, a wind speed, a speed of a ship, and a ship heading). When inputted through (not shown) (see FIG. 8), the computer 20 calculates a ship's conversion evaluation value and its limit evaluation value by a predetermined program (for example, a ship performance evaluation program) capable of evaluating the ship performance. To calculate a comprehensive ship performance indicator that assesses the ship's overall navigational safety.

Thus, the computer 20 outputs the current state using the navigational safety evaluation chart as shown in FIG. 9 in order to enable the ship operator to visually easily determine the navigational safety on the image processing space of the monitor 30. And, as shown in Figure 10 to output the navigation safety progress to provide the necessary measures (e.g. quantitative data, such as change, change of speed, speed adjustment, etc.) necessary to escape the dangerous state.

Now, the method of calculating the comprehensive sailing performance index for evaluating the overall navigational safety of the ship using the ship's conversion evaluation value and its limit evaluation value will be described in detail.

First, when calculating the variance value of the ship resistance performance evaluation element, the ship is a constant course for the short-wave irregular wave ( If you are sailing while maintaining the speed and V } 'S frequency response function Speaking of spectrum } Is shown in Equation 1 below.

In addition, the variance of any resistance performance factor { } Is calculated by the following equation.

The variable that changes the dispersion value is the angle of encounter with the wave of the ship ( ), Ship speed (V) and sea state (S).

Stochastic process of the resistance performance factor }, The amplitude variation with respect to the instantaneous time follows the Gaussian distribution, the extreme of which depends on the Rayleigh distribution. Once the variance of any of the ship's performance evaluation factors is obtained, the probability that the extreme value of the probability process exceeds a certain value is calculated by the following equation (3).

Solving this with respect to the standard deviation is shown in Equation 4 below.

In Equation 4, the limit value of each resistance performance evaluation factor ( Marginal probability of exceeding ), The critical standard deviation ( ) Is calculated by the following equation (5).

The extreme distribution of the random resistance performance evaluation factor is Rayleigh distribution. It is called. In this case, the reciprocal of the non-dimensionalized threshold as the standard deviation The evaluation of the element ( ) Is calculated by the following equation (6).

At this time, the evaluation value ( ) Equals 0, then a random element ( ) Is 1.0 and the evaluation value ( ) Becomes infinity The reliability of the element is zero.

Also, any Limit estimates for a given probability of occurrence of a limit ) Is obtained from Equation 7 below.

At this time, Is Is the critical standard deviation that becomes dangerous.

Meanwhile, In the case of, ) Is dangerous, In the case of safety.

Where any , Factor risk If Based on an element The ratio of the risk For element The relative risk of the element ( ) Is shown in Equation 8 below.

only, Is the ratio of the marginal estimates of the i and j elements, and the marginal estimate is calculated by the following equation (9).

From here If is Compared to element The elements are more dangerous, Has the opposite meaning.

Afterwards, the conversion evaluation value of the whole ship composed of N ) Is calculated by the following equation (10).

here, to be.

And, the reliability function ( ) Is shown in Equation 11 below.

In addition, the ship's limit estimate ( ) Is calculated by the following equation (12).

here, to be.

here, Is a function of reliability : The probability of marginal occurrence of each evaluation factor.

Thus, the navigational safety of the entire ship is limited to ) And the conversion estimate ( ), And the SPI is calculated and evaluated by the following equation (13).

When explaining the algorithm of the resistance performance evaluation program, first, the computer 20 is automatically calculated based on the signal for the up and down acceleration of the hull transmitted from the up and down accelerometer 10 by using the dispersion value of the up and down acceleration inputted The standard deviation is calculated and the probability of occurrence and risk of this factor is calculated.

Here, the relative risks of each ship performance evaluation factor for up / down acceleration in each loading state, sea condition, wave encounter angle, and ship speed are calculated by using the information stored in the relative risk DB. The risk is used to calculate the conversion estimates for each ship performance assessment factor.

In this case, the ship's resistance performance evaluation factors include six factors such as vertical acceleration, deck wetness, propeller racing, slamming, lateral motion, vertical acceleration, left and right acceleration. Consists of

In ships sailing in the waves, each of these ship performance evaluation factors occurs when the given limit is exceeded, and when the probability of occurrence exceeds the given limit, the ship will lose its function or become dangerous in the wave.

The limit values and probability of occurrence of the limits for each resistance performance evaluation factor are shown in Table 1 below.

On the other hand, the relative risk is a value representing the ratio of the risk for each of the remaining five evaluation factors to the risk of up and down acceleration, which is largely different values depending on the loading state of the vessel, the encounter angle of waves, the sea state, the speed of the vessel, etc. Will have At this time, the encounter angle with the wave is calculated from the heading of the ship and the true wind direction, the sea state is calculated from the true wind speed.

Table 2 below shows the items and conditions of the relative risk DB, and the graph of FIG. 6 shows, as an example, the encounter angle with waves in the loaded state (eg, Half Loaded Condition) and the sea state (eg, BFNo.7). Relative risk of bowing seawater intrusion phenomenon for up and down acceleration in the range of 180 degrees (head wave) to 100 degrees ( ) Is a graph showing the function value for each ship speed (V).

Item Condition Loading condition Full, Half, Ballast Condition Maritime status B.F.No. 3-10 Reverberation 10-degree intervals from 180 degrees [head wave] to 000 degrees (stern wave) Ship speed 0-14knots

An example of the relative risk function included in the algorithm of the ship performance evaluation program is shown in Table 3 below. At this time, the loading state is Half Condition and the resolution state is B.F.No.7.

Reverberation Relative risk 180 degrees AVDMU = 0.0015 * V ** 2-0.05 * V + 0.9269, AVRMU = 0.0071 * V ** 2-0.1788 * V + 1.9992 AVSMU = 0.0031 * V ** 2-0.1065 * V + 2.0881, AVLMU = 0.0043 * V * * 2-0.1111 * V + 0.9048AVATMU = 0.0091 * V ** 2-0.2548 * V + 2.6701 170 degrees AVDMU = 0.0014 * V ** 2-0.0481 * V + 0.9147, AVRMU = 0.0067 * V ** 2-0.1724 * V + 1.9771 AVSMU = 0.0029 * V ** 2-0.1024 * V + 2.0604, AVLMU = 0.0043 * V * * 2-0.1115 * V + 0.9292 AVATMU = 0.0092 * V ** 2-0.2595 * V + 2.7643 160 degrees AVDMU = 0.0012 * V ** 2-0.0431 * V + 0.8826, AVRMU = 0.0063 * V ** 2-0.1634 * V + 1.9321 AVSMU = 0.0024 * V ** 2-0.091 * V + 1.9867, AVLMU = 0.0042 * V * * 2-0.1125 * V + 0.9948AVATMU = 0.0093 * V ** 2-0.2685 * V + 2.9876 150 degrees AVDMU = -0.0223 * V + 0.7969, AVRMU = 0.0051 * V ** 2-0.1342 * V + 1.7495 AVSMU = 0.0015 * V ** 2-0.0687 * V + 1.8466, AVLMU = 0.0038 * V ** 2-0.1058 * V + 1.0466 AVATMU = 0.0083 * V ** 2-0.2551 * V + 3.1439 140 degrees AVDMU = -0.0172 * V + 0.7235, AVRMU = 0.0037 * V ** 2-0.1002 * V + 1.5423 AVSMU = 0.0005 * V ** 2-0.0446 * V + 1.661, AVLMU = 0.0034 * V ** 2-0.0951 * V + 1.088 AVATMU = 0.007 * V ** 2-0.2295 * V + 3.2649 130 degrees AVDMU = -0.0138 * V + 0.6712, AVRMU = 0.0034 * V ** 2-0.0914 * V + 1.484 AVSMU = -0.03 * V + 1.5363, AVLMU = 0.0035 * V ** 2-0.0902 * V + 1.1786AVATMU = 0.0064 * V ** 2-0.2195 * V + 3.5318 120 degrees AVDMU = -0.0103 * V + 0.6167, AVRMU = 0.0029 * V ** 2-0.0694 * V + 1.3071 AVSMU = -0.0003 * V ** 2-0.019 * V + 1.4129, AVLMU = 0.0029 * V ** 2-0.0722 * V + 1.2142 AVATMU = 0.0049 * V ** 2-0.1835 * V + 3.6472 110 degrees AVDMU = -0.0003 * V ** 2-0.0012 * V + 0.5286, AVRMU = 0.0015 * V ** 2-0.0358 * V + 1.1404 AVSMU = -0.0007 * V ** 2-0.0025 * V + 1.2227, AVLMU = 0.0035 * V ** 2-0.0603 * V + 1.2271 AVATMU = 0.004 * V ** 2-0.137 * V + 3.683 100 degrees AVDMU = -0.0006 * V ** 2 + 0.006 * V + 0.4713, AVRMU = 0.0011 * V ** 2-0.0325 * V + 1.261 AVSMU = -0.0012 * V ** 2 + 0.0129 * V + 1.0919, AVLMU = 0.0039 * V ** 2-0.0439 * V + 1.3082AVATMU = 0.0021 * V ** 2-0.0844 * V + 3.9397

Where V is the speed of the ship, ADMU is the relative risk function of the deck deck seawater intrusion against the up and down acceleration, and AVRMU is the relative risk function of the propeller racing against the up and down acceleration. Slamming's relative risk function for up / down acceleration, AVLMU: Relative risk function for lateral movement for up and down acceleration, AVATMU: Relative risk function for left and right acceleration for up and down acceleration.

In this way, the navigation safety evaluation chart and the navigation safety progress chart are outputted by the ship operator visually and easily on the basis of the comprehensive sailing performance index that evaluates the overall navigation safety of the ship using the ship's conversion evaluation value and its limit evaluation value. Can be evaluated.

Now, referring to FIG. 3, a method for evaluating a ship's overall sailing performance is described. The computer 20 uses the CFG file to initialize the up / down acceleration measuring device 10 (zero point acceleration). Perform (S100).

Then, the computer 20 calculates the vertical acceleration to calculate the average value and the vertical acceleration of the vertical acceleration based on the signal for the vertical acceleration of the hull received through the A / D converter 15 of the vertical acceleration measuring instrument 10 Perform the subroutine (S200 of Figure 3).

The up-down acceleration calculation subroutine S200 will be described in detail with reference to FIG. 4, and the computer 20 receives a signal for up-down acceleration of the hull detected from the up-down acceleration meter 10 (S201).

Thereafter, the computer 20 determines whether the input signal at the initial stage of vertical acceleration is zero (S203). As a result of the determination in step S203, when the input signal of the up-down acceleration phase is zero, the process moves to the above-described step S201 to receive the sensed signal and perform measurement.

As a result of the determination in step S203, if the input signal at the initial acceleration and acceleration is not zero, it is determined whether the measurement time reaches 10 minutes (S205). As a result of the determination in step S205, when the measurement time has not reached 10 minutes, the standby state is maintained for a predetermined time.

Here, the digital input signal of the up and down acceleration is converted into a value corresponding to the gravitational acceleration by the scale measurement value which is input in advance so as to be displayed as time series data on the monitor screen as shown in FIG.

As a result of the determination in step S205, when the measurement time reaches 10 minutes, the computer 20 is to calculate the average value and the up and down acceleration of the vessel based on the received vertical acceleration (S207).

The computer 20 is then loaded from the operator via an input device (not shown), such as a keyboard and a mouse, such as a full condition, a half condition, a ballast condition, and a sea condition. , Wind direction, wind speed, speed of the ship and the course of the ship) is determined (S300).

As a result of the determination in step S300, when the loading state and the sea condition are not input from the operator, the standby state is maintained for a predetermined time.

As a result of the determination in step S300, when the loading state and the sea condition is input from the operator, the computer 20 is automatically calculated based on the up and down acceleration of the hull transmitted from the up and down accelerometer 10 of the input up and down acceleration The standard deviation is calculated using the variance (S304).

The computer 20 uses the calculated standard deviation to calculate the limit value ( Probability of occurrence of up and down acceleration, which is the probability of exceeding )this To be calculated (S306).

Thereafter, the computer 30 determines whether a loading state, a sea condition, a wave direction, and a current ship speed are input. Relative risk calculation subroutine for calculating the risk is performed (S400 of FIG. 3).

The relative risk calculation related subroutine S400 will be described with reference to FIG. 5, and the computer 20 determines whether a loading state (for example, full condition, half condition, ballast condition) has been input (S401). ). As a result of the determination in step S401, when the loading state is not input, the standby state is maintained for a predetermined time.

As a result of the determination in step S401, when the loading state is input, the computer 20 determines whether a sea state (for example, B.F.No. 3-10) is input (S403). As a result of the determination in step S403, if the sea state is not input, the standby state is maintained for a predetermined time.

As a result of the determination in step S403, when the sea state is input, the computer 20 determines whether the wave direction (for example, 180 degrees-000 degrees, 10 degrees intervals) is input (S405). As a result of the determination in step S405, if no wave direction is input, the standby state is maintained for a predetermined time.

As a result of the determination in step S405, when the wave direction is input, the computer 20 determines whether a current ship speed (for example, Knots) is input (S407). As a result of the determination in step S407, the computer 20 maintains a standby state for a predetermined time when a current ship speed is not input.

As a result of the determination in step S407, when the current ship speed is input, the computer 20 causes the relative risk of each of the ship performance evaluation factors to be calculated based on the corresponding condition (S409).

Thereafter, the computer 20 evaluates the overall navigational safety of the ship by using the conversion evaluation value and the limit evaluation value of the ship calculated by a predetermined program capable of evaluating the performance (for example, the ship performance evaluation program). Comprehensive sailing performance index to be calculated (S500).

Thus, the computer 20 causes the navigation safety evaluation chart and the navigation safety progress chart to be displayed on the image processing space of the monitor 30 on the basis of the calculated comprehensive sailing performance index (S502) (see FIGS. 9 and 10). .

In this way, the safety of the vessel during navigation can be easily visually judged on the image processing space of the monitor.

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

As described above, the present invention by providing a vertical acceleration sensor to the vessel to easily provide a signal for the vertical acceleration detected through the vertical acceleration sensor installed from the resistance performance evaluation element, the overall of the ship considering the multi-dimensional resistance performance evaluation element There is an effect that can easily evaluate the comprehensive navigational safety.

In addition, the present invention outputs the navigation safety evaluation chart and the navigation safety progress chart based on the comprehensive navigation performance index that evaluates the overall navigation safety of the ship by using the ship's conversion evaluation value and the limit evaluation value of the ship by the ship operator sailing at the time The safety or navigational safety of the scheduled route can be judged at a glance.

In addition, the present invention has the effect of having many advantages in practical use in terms of economics of the system manufacturing unit cost by requiring only one element of the resistance measurement performance factor.

Figure 1 is a block diagram for explaining the overall configuration of the ship's overall resistance performance evaluation system according to an embodiment of the present invention,

2 is a view for explaining the up and down accelerometer of FIG.

3 is an operation flowchart for explaining a method for evaluating a comprehensive sailing performance of a ship according to an embodiment of the present invention;

4 is an operation flowchart for explaining in detail the up-down acceleration calculation subroutine of FIG.

5 is an operation flowchart for explaining in detail the relative risk calculation subroutine of FIG.

6 is a graph showing the relative risk of each evaluation factor for the up and down acceleration,

7 is an exemplary screen illustrating an input signal of up and down acceleration;

8 is an exemplary view showing a screen for inputting a vessel and a sea condition;

9 is an exemplary view showing a ship comprehensive navigation safety evaluation diagram,

10 is an exemplary view showing a ship comprehensive navigation safety progress diagram.

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

10: up and down accelerometer 11: power supply

12: power on / off switch 13: up and down acceleration sensor

14: terminal block 15: A / D converter

20: computer

Claims (4)

An up and down acceleration measuring device (10) installed in the ship and measuring the acceleration in the up and down direction generated by the movement of the hull, After initializing the up and down accelerometer, the up and down acceleration measured by the up and down accelerometer is transmitted to calculate the dispersion value of the up and down acceleration, and the ship using the calculated dispersion value and the loading state and the sea condition received from the operator. Computer 20 for calculating a comprehensive sailing performance indicator for evaluating the navigational safety of The vertical acceleration measuring device, A power supply device 11 for converting the power on / off switch 12 into a predetermined voltage level by receiving power from the outside; Vertical acceleration sensor 13 for detecting the vertical acceleration generated in accordance with the degree of flexibility of the six degrees of freedom of the hull; A terminal block (14) for supplying a predetermined voltage applied through the power supply device to the vertical acceleration sensor, and connected to the outside to transmit a signal for vertical acceleration detected through the vertical acceleration sensor; And Connected to the terminal block, the up and down acceleration signal detected by the up and down acceleration sensor is converted into a digital signal, the acceleration value of the ship based on the signal for the up and down acceleration from the computer receiving the converted signal An A / D converter 15 to be calculated, The computer, A predetermined program for evaluating the ship's ship performance is installed.In order to zero the up / down acceleration, the up / down acceleration meter is initialized, and then the dispersion value is calculated based on the up / down acceleration received from the up / down acceleration meter. After calculating the relative risk of each ship performance evaluation factor for up and down acceleration using the loading condition and the sea condition, and using the calculated relative risks, the conversion evaluation value and the limit evaluation value of each ship performance evaluation factor are calculated. Comprehensive seaworthiness performance evaluation system of a ship characterized in that the navigation safety evaluation degree and the navigational safety progress chart are displayed on the monitor image processing space based on the comprehensive seaward performance index calculated as the ratio of the limit evaluation value to the calculated conversion evaluation value. . delete (A) initializing the up and down accelerometer for zero adjustment of the up and down acceleration (S100); (b) calculating a dispersion value of the vertical acceleration when the predetermined time is received by receiving a signal for the vertical acceleration of the vessel detected from the vertical acceleration measuring instrument (a) initialized for a predetermined time (S200); (c) receiving a loading state and a sea condition of the ship from the operator (S300); (d) the navigational safety of the ship using the variance value calculated in step (b) and the conversion evaluation value of each ship performance evaluation factor calculated based on the loading condition and the sea condition of the ship inputted in step (c) Calculating a comprehensive resistance performance index for evaluating (S500); And (e) comprising the step (S502) of displaying the navigational safety evaluation chart and the navigational safety progress chart on the image processing space of the monitor based on the comprehensive navigation performance index calculated through step (d), In step (d), Calculate the relative risk of each ship performance evaluation factor against up / down acceleration, and calculate the overall ship performance performance indicator by using the conversion evaluation value of each ship performance evaluation factor calculated using the calculated relative risk and its marginal evaluation value. Comprehensive seaworthiness performance evaluation method of the ship characterized by. delete