A ship operation state control method and control system based on acceleration model

Abstract

The present invention relates to the field of ship technology, and provides a ship operation state control method and control system based on an acceleration model. The method uses an acceleration model to perform an accelerated life test on a ship power system and key components; forms a curve chart with time as the horizontal coordinate and the operation state parameters of the ship power system and key components as the vertical coordinate, and obtains the operation state parameters of the ship power system and key components in real time through a main control unit; forms a dynamic change curve with time as the horizontal coordinate and the operation state parameters of the ship power system and key components as the vertical coordinate; and judges the life of the ship power system and the fatigue of key components by comparing the dynamic change curve with the curve chart. The present invention uses a high-performance main control unit to apply an acceleration model to evaluate the life of the ship power system and the fatigue of key components, which is convenient for mastering the ship operation state, reducing the risk of the ship, and ensuring the safety of personnel life.

Description

Technical Field

[0001] The present invention relates to the technical field of ship control, and in particular to a ship operation state control method and control system based on an acceleration model. Background Art

[0002] Control systems with storage and data processing capabilities have been widely used in the fields of industry, transportation, and shipping. They are an important part of modern production and testing, and have greatly improved production efficiency and automation. However, at present, intelligent ship control systems can only monitor the switch, temperature, voltage, current and other information of the equipment, and do not have the ability to evaluate the life of the marine power system and the fatigue of key components, and the degree of intelligence is relatively low. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the related art. To this end, the present invention provides a ship operation state control method and control system based on an acceleration model. The main control unit forms a dynamic change curve through storage and analysis, and simulates the ship operation state in combination with the acceleration model to obtain the life of the ship power system and the fatigue of key components.

[0004] The present invention provides a ship operation state control method based on an acceleration model, comprising:

[0005] S1: Accelerated life tests are conducted on marine power systems and key components using temperature stress acceleration models, humidity stress acceleration models, and vibration stress acceleration models to obtain experimental data;

[0006] S2: Analyze and process the obtained experimental data to form a curve graph with time as the horizontal axis and the operating status parameters of the marine power system and key components as the vertical axis, and summarize the curve graph into an experimental database;

[0007] S3: Obtain the operating status parameters of the marine power system and key components in real time through the main control unit;

[0008] S4: The main control unit forms a dynamic change curve with time as the horizontal axis and the operating status parameters of the marine power system and key components as the vertical axis by analyzing the operating status parameters of the marine power system and key components;

[0009] S5: By comparing the dynamic change curve with the curve graph in the experimental database, the life of the marine power system and the fatigue of key components can be determined.

[0010] According to a ship operation state control method based on an acceleration model provided by the present invention, the temperature stress acceleration model adopts Arrhenius theory to obtain a temperature stress acceleration factor;

[0011] Within a certain temperature range, the relationship between the reaction rate of the product and the absolute temperature of the product conforms to the Arrhenius equation, and the reaction rate expression is:

[0012]

[0013] in, is the reaction rate, is the product characteristic value, Activate energy for products, is the Boltzmann constant, is an exponential function, is a constant variable, is the absolute temperature of the product, For time.

[0014] The time it takes for a product to go from the first product state to the second product state is expressed as:

[0015]

[0016] in, is the time it takes for the product to go from the first product state to the second product state, is the characteristic value of the first product state, is the characteristic value of the first product state; the acceleration factor of temperature stress is derived according to the time the product experiences from the first product state to the second product state, and the temperature stress acceleration factor is:

[0017]

[0018] in, is the temperature stress acceleration factor, is the absolute temperature under normal use conditions, is the absolute temperature under test conditions, is the relative temperature under test conditions, It is the relative temperature under actual use conditions.

[0019] According to a ship operation state control method based on an acceleration model provided by the present invention, the humidity stress acceleration model adopts the Hallberg-Peck theory to obtain a humidity stress acceleration factor, and the humidity stress acceleration factor calculation expression is:

[0020]

[0021] in, is the humidity stress acceleration factor, is the actual test humidity, Humidity for accelerated life testing. is the acceleration rate constant of humidity.

[0022] According to a ship operation state control method based on an acceleration model provided by the present invention, the vibration stress acceleration model adopts the Pam Glenn-Mainer linear cumulative fatigue damage theory to obtain a vibration stress acceleration factor. When acceleration is performed by the magnitude, the acceleration formula is:

[0023]

[0024] in, is the vibration stress acceleration factor, For the specified time, For the acceleration time, is the specified sinusoidal vibration value, is the magnitude of the accelerated sinusoidal vibration, is the exponential material constant.

[0025] A ship operation state control method based on an acceleration model provided by the present invention also includes obtaining a total acceleration factor by adding a temperature stress acceleration factor, a humidity stress acceleration factor and a vibration stress acceleration factor, and performing accelerated life tests on a ship power system and key components using the total acceleration factor.

[0026] The present invention also provides a ship operation status control system based on an acceleration model, comprising: a main control unit and a storage unit, wherein the storage unit comprises a storage hard disk greater than or equal to 512G, and the storage unit is connected to the main control unit and is used to record data and status files generated during the operation of the ship; the main control unit obtains data from the storage unit for controlling the operation status of the ship.

[0027] A ship operation status control system based on an acceleration model provided by the present invention also includes a digital input and output unit and an analog input and output unit. The digital input and output unit is connected to the main control unit for collecting and outputting digital signals; the analog input and output unit is connected to the main control unit for collecting and outputting analog signals.

[0028] A ship operation status control system based on an acceleration model provided by the present invention also includes a network switching unit and an alarm unit. The network switching unit is connected to the main control unit and is used for sending and downloading data; the alarm unit is connected to the main control unit and is used to issue a warning when an abnormal state occurs in the ship power system and key components.

[0029] A ship operation status control system based on an acceleration model provided by the present invention also includes a power supply unit and a display unit. The power supply unit is connected to a voltage-stabilized power supply to provide the power required by the system; the display unit is connected to the main control unit for human-computer interaction.

[0030] The above one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

[0031] The present invention provides a ship operation status control method and control system based on an acceleration model. The present invention can evaluate the life of a ship power system and the fatigue of key components by applying an acceleration model through a high-performance main control unit, and intuitively present the evaluation results to a user through a display device, so that the user can understand the ship operation status, reduce the risk of the ship, ensure the safety of personnel, and improve the operation efficiency.

[0032] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is a flow chart of a method for controlling the operation status of a ship based on an acceleration model provided by the present invention.

[0035] Figure 2 It is a structural schematic diagram of a ship operation status control system based on an acceleration model provided by the present invention.

[0036] Figure 3 It is a battle damage spectrum diagram after acceleration for experiment of a ship operation state control method based on an acceleration model provided by the present invention.

[0037] Figure 4 It is a transport vibration spectrum diagram after acceleration for experiment of a ship operation state control method based on an acceleration model provided by the present invention.

[0038] Figure 5 It is a cross-sectional diagram of a comprehensive life test of cold cycle and cold soak of a ship operation state control method based on an acceleration model provided by the present invention.

[0039] Figure 6 It is a cross-sectional diagram of a comprehensive life test of a cold cycle without cold soaking of a ship operation state control method based on an acceleration model provided by the present invention.

[0040] Reference numerals:

[0041] 1. Main control unit; 2. Storage unit; 3. Digital input and output unit; 4. Analog input and output unit; 5. Network switching unit; 6. Alarm unit; 7. Display unit; 8. Power supply unit; 9. Regulated power supply. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme in the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0043] In the description of the embodiments of the present invention, it should be noted that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0044] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0045] Combine the following Figures 1 to 6 The present invention describes a ship operation state control method and control system based on an acceleration model.

[0046] like Figure 1 As shown, a ship operation state control method based on an acceleration model includes:

[0047] S1: Accelerated life tests are conducted on marine power systems and key components using temperature stress acceleration models, humidity stress acceleration models, and vibration stress acceleration models to obtain experimental data;

[0048] S2: Analyze and process the obtained experimental data to form a curve graph with time as the horizontal axis and the operating status parameters of the marine power system and key components as the vertical axis, and summarize the curve graph into an experimental database;

[0049] S3: Obtain the operating status parameters of the marine power system and key components in real time through the main control unit;

[0050] S4: The main control unit forms a dynamic change curve with time as the horizontal axis and the operating status parameters of the marine power system and key components as the vertical axis by analyzing the operating status parameters of the marine power system and key components;

[0051] S5: By comparing the dynamic change curve with the curve graph in the experimental database, the life of the marine power system and the fatigue of key components can be determined.

[0052] Specifically, in some embodiments of the present invention,

[0053] S1: Accelerated life tests are conducted on marine power systems and key components using temperature stress acceleration models, humidity stress acceleration models, and vibration stress acceleration models to obtain experimental data;

[0054] Marine power systems and key components include electronic components, printed circuit boards, aluminum profiles, etc. Among them, printed circuit boards and aluminum profiles can meet the 10-year life requirement, and their performance will not be significantly degraded after long-term use, while the aging of electronic components is the main factor affecting the life indicators of marine power systems and key components.

[0055] The accelerated failure stresses of electronic components mainly include temperature stress, humidity stress and vibration stress.

[0056] High temperature can accelerate chemical reactions of electronic components, aggravate the performance degradation of electronic components and cause premature failure of components. It is a typical stress among the accelerated failure stress of electronic components.

[0057] Humidity can exacerbate the failure mechanism of components. For example, in the case of bias in the metallization system of semiconductor devices, moisture causes metal ions in the metallization to migrate across the insulating surface between the two metals, leading to electrolytic corrosion, which in turn causes failures and shortens the life of electronic components. Vibration stress refers to fatigue and wear of products or materials under vibration stress conditions, which affects their service life. The main environmental effects of vibration stress are: structural damage, which exacerbates product fatigue and wear and shortens its service life, such as structural deformation, product cracks or fractures; product functional failure or poor performance, such as poor contact and relay malfunction; process damage, such as loose screws or connectors and desoldering.

[0058] The present invention conducts accelerated life test by adopting the methods of temperature stress acceleration, humidity stress acceleration and vibration stress acceleration.

[0059] The acceleration model of the present invention includes a temperature stress acceleration model, a humidity stress acceleration model and a vibration stress acceleration model.

[0060] Furthermore, in some embodiments of the present invention, the temperature stress acceleration model adopts the Arrhenius model. Within a certain temperature range, the relationship between the reaction rate of the product and the absolute temperature of the product conforms to the Arrhenius equation, and the reaction rate expression is:

[0061]

[0062] in, is the reaction rate, is the product characteristic value, Activate energy for products, is the Boltzmann constant, is an exponential function, is a constant variable, is the absolute temperature of the product, For time.

[0063] The product activation energy is the minimum energy limit for molecules to collide and react, which represents the energy barrier in the process of product transformation from normal non-failure state to failure state. Referring to QJ908B-2012 electronic product aging test method, 0.6eV is selected as The calculated value of k is the Boltzmann constant, which is 8.617×10-5eV / K.

[0064] The time it takes for a product to go from the first product state to the second product state is expressed as:

[0065]

[0066] in, is the time it takes for the product to go from the first product state to the second product state, is the characteristic value of the first product state, is the characteristic value of the first product state; the acceleration factor of temperature stress is derived according to the time the product experiences from the first product state to the second product state. The acceleration factor of temperature stress is:

[0067]

[0068] in, is the acceleration factor of temperature stress, is the absolute temperature under normal use conditions, is the absolute temperature under test conditions, is the relative temperature under test conditions, It is the relative temperature under actual use conditions.

[0069] Furthermore, in some embodiments of the present invention, the humidity acceleration model adopts the Hallberg-Peck equation, and the humidity acceleration factor calculation expression is:

[0070]

[0071] in, is the humidity acceleration factor, is the actual test humidity, Humidity for accelerated life testing. is the acceleration rate constant of humidity.

[0072] Furthermore, in some embodiments of the present invention, the vibration stress model adopts the Palmgern-Miner linear cumulative fatigue damage theory. When acceleration is performed by magnitude, the acceleration formula is:

[0073]

[0074] in, is the vibration stress acceleration factor, For the specified time, For the acceleration time, is the specified sinusoidal vibration value, is the magnitude of the accelerated sinusoidal vibration, is the exponential material constant.

[0075] In some embodiments of the present invention, the total acceleration factor is obtained by adding the temperature stress acceleration factor, the humidity stress acceleration factor and the vibration stress acceleration factor, and the total acceleration factor is used to perform accelerated life tests on the marine power system and key components.

[0076] The purpose of this step is to obtain experimental data through temperature stress acceleration, humidity stress acceleration and vibration stress acceleration.

[0077] S2: Analyze and process the obtained experimental data to form a curve graph with time as the horizontal axis and the operating status parameters of the marine power system and key components as the vertical axis, and summarize the curve graph into an experimental database;

[0078] In some embodiments of the present invention, the obtained experimental data are connected to form a curve graph with time as the horizontal axis and the operating status parameters of the marine power system and key components as the vertical axis.

[0079] S3: Obtain the operating status parameters of the marine power system and key components in real time through the main control unit;

[0080] The main control unit is connected to the storage unit and each functional unit through control lines and data lines, and obtains data information of each functional unit, thereby obtaining the operating status parameters of the marine power system and key components.

[0081] In some embodiments of the present invention, under normal operating conditions, operating status parameter data of each functional unit of the tested ship under certain temperature, humidity and vibration stress conditions are obtained through the main control unit.

[0082] The purpose of this step is to obtain real-time operating status parameter data of the marine power system and key components.

[0083] S4: The main control unit forms a dynamic change curve with time as the horizontal axis and the operating status parameters of the marine power system and key components as the vertical axis by analyzing the operating status parameters of the marine power system and key components;

[0084] In some embodiments of the present invention, the main control unit analyzes the operating status parameters of the marine power system and key components by obtaining the operating status parameter data of the marine power system and key components in real time, and forms a dynamic change curve with time as the horizontal axis and the operating status parameters of the marine power system and key components as the vertical axis for the obtained data.

[0085] The purpose of this step is to obtain the dynamic change curves of the marine power system and key components.

[0086] S5: By comparing the dynamic change curve with the curve graph in the experimental database, the life of the marine power system and the fatigue of key components can be determined.

[0087] When judging the life of the marine power system and the fatigue of key components, if the operating status data exceeds the experimental data, it is considered to have exceeded the theoretical level and an alarm is performed to indicate that the life of the marine power system and the fatigue of key components have exceeded the regulations and need to be processed.

[0088] The purpose of this step is to evaluate the life of the ship's power system and the fatigue of key components. If there is danger, timely processing can be carried out to reduce the risk of the ship and ensure the safety of personnel lives.

[0089] like Figure 2 As shown, a ship operation status control system based on an acceleration model includes a main control unit 1 and a storage unit 2. The storage unit 2 includes a storage hard disk greater than or equal to 512G. The storage unit 2 is connected to the main control unit 1 and is used to record data and status files generated during the operation of the ship. The large-capacity storage hard disk can store a larger amount of data, which is convenient for the system to perform dynamic analysis. The main control unit 1 can obtain data from the storage unit. The main control unit 1 has a high-performance CPU and can quickly process a large amount of data. The main control unit 1 is used to control the operation status of the ship.

[0090] A ship operation status control system based on an acceleration model provided by the present invention also includes a digital input and output unit 3 and an analog input and output unit 4. The digital input and output unit 3 is connected to the main control unit 1 for collecting and outputting digital signals; the analog input and output unit 4 is connected to the main control unit 1 for collecting and outputting analog signals.

[0091] By setting the digital input and output unit 3 and the analog input and output unit 4, the digital input signal, the digital output signal, the analog input signal and the analog output signal can be tested.

[0092] A ship operation status control system based on an acceleration model provided by the present invention also includes a network switching unit 5 and an alarm unit 6. The network switching unit 5 is connected to the main control unit 1 and is used for sending and downloading data; the alarm unit 6 is connected to the main control unit 1 and issues a warning when an abnormal state occurs, prompting the equipment to have an abnormal condition so that timely measures can be taken to reduce the risk of the ship.

[0093] A ship operation status control system based on an acceleration model provided by the present invention also includes a power supply unit and a display unit. The power supply unit 8 is connected to a voltage-stabilized power supply 9 to provide the power required by the system; the display unit 7 is connected to the main control unit 1 to intuitively present data and status to the user in the form of images, thereby facilitating human-computer interaction.

[0094] Example:

[0095] Marine power systems and key components include controllers, propellers, transmission rods, rudders, etc.

[0096] The state parameters of the controller include analog current output, the state parameters of the propeller include propeller speed, propeller blade angle of attack, and propeller torque, the state parameters of the transmission rod include the transmission rod vibration frequency amplitude; the state parameters of the rudder include rudder angle and stern water flow velocity; these state parameters can be used to determine the state of the marine power system and key components.

[0097] This embodiment applies the same stress conditions to the controller in the working condition and the standby condition, and calculates the acceleration factor respectively according to the different characteristics of the basic environment of the working condition and the standby condition of the controller.

[0098] The controller itself has been treated with three protections. At the same time, the controller adopts a sealed design, and the contact gap is sealed with a conductive rubber pad. The direct impact of humidity on components is small. After analysis, the impact of humidity on the life of the controller is not considered. Therefore, this embodiment only considers the impact of temperature and vibration.

[0099] The controller service life index requirement is 10 years, the annual working time is calculated as 3000 hours, the annual standby time is calculated as 2760 hours, the total number of working and standby days per year is calculated as 240 days, and the total accumulated power-on time in 10 years is 57600 hours.

[0100] With reference to the test profile of equipment installed inside surface ships in GJB899A, the accelerated life test applies stress according to 1 cold cycle (24h) + 6 hot cycles (46h) as a large cycle, that is, each large cycle time is 300h.

[0101] The cold cycle is accelerated by vibration stress, while the hot cycle is accelerated by temperature + vibration stress.

[0102] Temperature acceleration factor:

[0103] For standby conditions, combined with the measured temperature on the actual ship and the mission profile under the condition of no temperature-controlled cabin in the ship specified in GJB899A, the maximum temperature of 22℃ (295.15K) is selected as the basic temperature, and the thermal cycle acceleration temperature is selected as 60℃ (333.15K). The acceleration factor is calculated according to the Arrhenius model: .

[0104] For the working conditions, combined with the measured temperature on the actual ship and the mission profile under the condition of no temperature control cabin specified in GJB899A, the average value of constant temperature 39℃ (312.15K) is selected as the basic temperature, and the thermal cycle acceleration temperature is selected as 60℃ (333.15K). The acceleration factor is calculated according to the Arrhenius model: .

[0105] Vibration acceleration factor:

[0106] The vibration stress is applied for 12 hours randomly selected every 24 hours in the cold cycle. The vibration magnitude is calculated with an acceleration factor of 8 to obtain the battle damage spectrum after acceleration. Figure 3 As shown, the transport vibration spectrum is Figure 4 As shown, we obtain:

[0107] For working conditions, the vibration acceleration factor is .

[0108] For standby conditions, the vibration acceleration factor is .

[0109] Humidity acceleration factor:

[0110] Since the controller itself has been treated with three protections, and the controller adopts a sealed design, and the contact gap is sealed with a conductive rubber pad, the direct impact of humidity on the components is small. After analysis, the impact of humidity on the life of the controller is not considered. Therefore, the humidity acceleration factor is 0.

[0111] For the multi-stress acceleration scheme, the most radical method among the schemes currently available for reference is to multiply the acceleration factors of each stress, and the most conservative method is to add the acceleration factors of each stress. In order to more fully verify the service life of domestically developed products in the field, this embodiment selects the method of adding the acceleration factors of each stress. The controller service life index requirement is 10 years, the annual working time is calculated as 3000h, the annual standby time is calculated as 2760h, the annual working and standby days are calculated as 240 days, and the total accumulated power-on time in 10 years is 57600h. The test time of the acceleration experiment is obtained by dividing each life index of the controller by the total acceleration factor.

[0112] For working conditions, the total acceleration factor of cold cycle is AF=16, and the total acceleration factor of hot cycle (vibration + temperature) is AF=16+4.08=20.08. The test time calculated according to the total acceleration factor is 150h (cold cycle test time) + 1374.5h (hot cycle test time) = 1524.5h.

[0113] For standby conditions, the total acceleration factor of the cold cycle (vibration) is AF=32, the total acceleration factor of the hot cycle (vibration + temperature) is AF=32+14.74=46.74, and the test time is 69h (cold cycle test time) + 543.26h (hot cycle test time) = 612.26h.

[0114] The total cumulative test time (hours) after acceleration is 219h (cold cycle) + 1917.76h (hot cycle) = 2136.76h.

[0115] Humidity is carried out according to the test profile of the equipment installed inside the surface ship in the original "GJB899A-2009 Reliability Appraisal and Acceptance Test".

[0116] Vibration level Figure 3 The battle damage spectrum after acceleration is shown, and Figure 4 The vibration spectrum of transportation after acceleration is shown. After the product is installed on the fixture, the vibration stress is applied in the Y direction.

[0117] Temperature curve and vibration time: There are three major cycles of cold and hot soak before the comprehensive life test profile such as Figure 5 The comprehensive life test section without hot and cold soaking for 4-7 large cycles is shown in the attached Figure 6 As shown, after the large cycle is completed, three cold cycles are followed.

[0118] The temperature and humidity profiles of the first 7 cycles of the accelerated test are as follows. The tolerance of all relative humidity should be ±5%, as follows:

[0119] Starting from 22℃ and 25% to 75% relative humidity, the temperature was lowered to -28℃ (cold soak) as quickly as possible. After maintaining at -28℃ (cold soak) for 1.75h (without power), the temperature was raised to 0℃ within 0.25h. The cold soak was only performed in the first 3 cycles.

[0120] After maintaining at 0°C for 19 h, the temperature was raised to 19°C in 2 h;

[0121] Within 1 hour, adjust the temperature and relative humidity to 22°C and 25% to 75% respectively;

[0122] Within 2 h, adjust the temperature and relative humidity to 60 °C and 50%, respectively;

[0123] Within 10 hours, slowly adjust the relative humidity to 48% and maintain it for 5 hours;

[0124] Within 5 hours, adjust the relative humidity to 50%;

[0125] Within 2 hours, the relative humidity was reduced to 43%;

[0126] Within 2 hours, adjust the relative humidity to 33%;

[0127] Within 9 hours, the relative humidity was slowly adjusted to 21% and maintained for 4 hours;

[0128] Rapidly raise the temperature to 70°C (hot soak) and the relative humidity to 95%, maintain for 2 hours (without power), then lower the temperature to 60°C as quickly as possible. Hot soak is only performed in the first 3 cycles;

[0129] Within 5 hours, slowly adjust the temperature and relative humidity back to 22°C and 25% to 75% respectively;

[0130] Repeat steps d) to k) five more times;

[0131] Return to step a) and repeat the above cycle 7 times.

[0132] The temperature and humidity profiles of the last three cycles of the accelerated test are as follows. The tolerance of all relative humidity should be ±5%, as follows:

[0133] Starting from 22℃ and 25% to 75% relative humidity, the temperature was lowered to -28℃ (cold soak) as quickly as possible. After maintaining at -28℃ (cold soak) for 1.75h (without power), the temperature was raised to 0℃ within 0.25h. The cold soak was only performed in the first 3 cycles.

[0134] After maintaining at 0°C for 19 h, the temperature was raised to 19°C in 1 h;

[0135] Within 0.5 h, adjust the temperature and relative humidity to 22°C and 25% to 75% respectively;

[0136] Within 0.5 h, adjust the temperature to 19 °C;

[0137] Within 1 h, adjust the temperature to 0°C;

[0138] Return to step a) and repeat the above cycle 2 times.

[0139] Except for hot and cold soaks, the products are in powered-on test state.

[0140] The total test duration is 240h (cold cycle) + 1932h (hot cycle) = 2172h, which meets the accelerated test duration requirement. This test duration is equivalent to the product life indicator requirement of 10 years.

[0141] In this embodiment, the analog voltage input to the controller is: voltage -10V to +10V, and the analog current output by the controller is 4mA to 20mA.

[0142] This embodiment obtains theoretical data of about ten years in actual use and verifies that the equipment can operate normally within the time limit. This embodiment uses daily experimental data, aggregates them into a table, and organizes and connects them into a curve graph. One day's experimental data covers about one month's actual parameters in reality, and the curve graphs are summarized to form a database.

[0143] In actual use, various sensors in the ship's main control system will collect real-time data and aggregate the real-time data into a dynamic curve graph.

[0144] The dynamic curve is compared with the curve formed by the experimental data in the database. If the simulation parameters corresponding to the operation period are obviously exceeded, a warning will be issued to notify professionals to handle it. Professionals will determine whether the equipment is obviously abnormal and whether there is an environment for maintenance.

[0145] The beneficial effects of the present invention are as follows: the present invention can evaluate the life of a marine power system and the fatigue of key components through a high-performance main control unit applying an acceleration model, and intuitively present the evaluation results to a user through a display device, making it easier for the user to understand the operating status of the ship, reduce the risk of the ship, ensure the safety of personnel, and increase operating efficiency.

[0146] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A ship operation state control method based on an acceleration model, characterized in that: include: S1: Accelerated life tests are conducted on marine power systems and key components using temperature stress acceleration models, humidity stress acceleration models, and vibration stress acceleration models to obtain experimental data; The temperature stress acceleration model adopts Arrhenius theory to obtain the temperature stress acceleration factor; The relationship between the reaction rate of the product and the absolute temperature of the product conforms to the Arrhenius equation, and the reaction rate expression is: in, is the reaction rate, is the product characteristic value, Activate energy for products, is the Boltzmann constant, is an exponential function, is a constant variable, The absolute temperature of the product For time; The time it takes for a product to go from the first product state to the second product state is expressed as: in, is the time it takes for the product to go from the first product state to the second product state, is the characteristic value of the first product state, is the characteristic value of the first product state; the acceleration factor of temperature stress is derived according to the time the product experiences from the first product state to the second product state, and the temperature stress acceleration factor is: in, is the temperature stress acceleration factor, is the absolute temperature under normal use conditions, is the absolute temperature under test conditions, is the relative temperature under test conditions, is the relative temperature under actual use conditions; The humidity stress acceleration model adopts the Hallberg-Peck theory to obtain the humidity stress acceleration factor, and the calculation expression of the humidity stress acceleration factor is: in, is the humidity stress acceleration factor, is the actual test humidity, Humidity for accelerated life testing. is the acceleration rate constant of humidity; The vibration stress acceleration model adopts Pam Glenn-Meiner linear cumulative fatigue damage theory to obtain the vibration stress acceleration factor. When acceleration is performed by magnitude, the acceleration formula is: in, is the vibration stress acceleration factor, For the specified time, For the acceleration time, is the specified sinusoidal vibration value, is the magnitude of the accelerated sinusoidal vibration, is the index material constant; S2: Analyze and process the obtained experimental data to form a curve graph with time as the horizontal axis and the operating status parameters of the marine power system and key components as the vertical axis, and summarize the curve graph into an experimental database; S3: Obtain the operating status parameters of the marine power system and key components in real time through the main control unit; S4: The main control unit forms a dynamic change curve with time as the horizontal axis and the operating status parameters of the marine power system and key components as the vertical axis by analyzing the operating status parameters of the marine power system and key components; S5: By comparing the dynamic change curve with the curve graph in the experimental database, the life of the marine power system and the fatigue of key components can be determined.

2. A ship operation state control method based on an acceleration model according to claim 1, characterized in that: The total acceleration factor is obtained by adding the temperature stress acceleration factor, the humidity stress acceleration factor and the vibration stress acceleration factor, and the accelerated life test of the marine power system and key components is carried out through the total acceleration factor.

3. A ship operation status control system based on an acceleration model, characterized in that: Used to execute a ship operation status control method based on an acceleration model as described in any one of claims 1 to 2, comprising: a main control unit and a storage unit, the storage unit comprising a storage hard disk greater than or equal to 512G, the storage unit being connected to the main control unit and being used to record data and status files generated during the operation of the ship; the main control unit obtains data from the storage unit for controlling the operation status of the ship.

4. A ship operation status control system based on an acceleration model according to claim 3, characterized in that: It also includes a digital input and output unit and an analog input and output unit. The digital input and output unit is connected to the main control unit for collecting and outputting digital signals; the analog input and output unit is connected to the main control unit for collecting and outputting analog signals.

5. The ship operation status control system based on the acceleration model according to claim 3 is characterized in that: It also includes a network switching unit and an alarm unit. The network switching unit is connected to the main control unit and is used for sending and downloading data; the alarm unit is connected to the main control unit and is used to issue a warning when an abnormal state occurs in the marine power system and key components.

6. A ship operation status control system based on acceleration model according to claim 3, characterized in that: It also includes a power supply unit and a display unit. The power supply unit is connected to a voltage-stabilized power supply to provide power required by the system; the display unit is connected to the main control unit for human-computer interaction.

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