CN113888088B - Digital twinning-based ship energy efficiency management system function verification platform - Google Patents
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Abstract
A digital twin-based ship energy efficiency management system function verification platform is disclosed. The energy efficiency management system is used for receiving energy efficiency data and ship type parameters of an applied ship, constructing a digital twin body capable of truly reflecting geometric, physical and navigation postures and navigation environment conditions of the ship, carrying out energy consumption virtual simulation in a real ship navigation process by using the digital twin body, carrying out energy efficiency optimization on the digital twin body of the ship by using the energy efficiency management system, and integrating an intelligent algorithm as a tool for effectiveness analysis and comparison, and evaluating effects before and after optimization of the energy efficiency management system to be tested by adopting a real-real and real-virtual verification mode. The invention has the initiative, the verification platform has the functions of testing and verifying the energy efficiency management system products in the laboratory stage, eliminates the research and development cost and experimental trial-and-error cost generated in the process of installing the energy efficiency management system in a real ship test, improves the research and development efficiency of the energy efficiency system, and also eliminates human errors in the verification process.
Description
Technical Field
The invention relates to a performance verification platform of a ship energy efficiency management system.
Background
The water route transportation has the advantages of large transportation volume, low cost, environment-friendly transportation and the like, and plays an important supporting role in the development of national economy and international trade. However, the ever increasing fuel costs and increasingly stringent pollution gas emissions regulations present challenges to the operation and energy efficiency optimization management of ships. At present, the application of energy conservation and emission reduction to ships is mainly completed by installing an energy efficiency management system to the ships.
The ship energy efficiency management system is an important means for ship operation management, and can improve the ship energy efficiency level and reduce the ship operation cost by comprehensively managing the energy efficiency. The system has the characteristics of multiple research variables, complex structure, different energy efficiency management systems of different ships and the like, so that huge workload is caused when the effectiveness of the system is verified in an initial research and development stage, meanwhile, the deviation of results caused by human errors is also unavoidable, and the working efficiency of developers is reduced.
Disclosure of Invention
The invention provides a digital twin-based ship energy efficiency management system function verification platform, which tests and verifies the effectiveness of functions of an energy efficiency management system in a laboratory stage under the condition that the energy efficiency management system is not required to be installed on a real ship. The development cost and the experiment trial-and-error cost can be reduced, and the research and development efficiency of the energy efficiency system can be improved. The development of ship energy efficiency optimization research is promoted, and the product has important significance for improving market competitiveness.
According to an embodiment, there is provided a digital twin based marine energy efficiency management system function verification platform, comprising:
the transmission unit is used for receiving navigation data of the ship to be applied by the energy efficiency management system to be tested, wherein the navigation data comprise energy consumption data and navigation environment data;
the real ship digital twin body is a digital twin model of a ship and a navigation environment, the ship state and the history data of the navigation environment in the whole navigation process of the ship at the voyage time are integrated, the designed digital twin model is utilized to simulate the whole navigation state at the whole navigation time domain, a virtual digital twin body is formed, and the designed digital twin body is utilized to simulate and analyze the energy consumption data of the whole navigation time so as to verify the effectiveness of the energy efficiency management system to be tested;
The data transmission interface is used for importing the navigation process data of the simulated simulation of the real ship digital twin body into the energy efficiency management system to be tested, and transmitting the optimized real energy consumption optimization data in the energy efficiency management system to be tested to a real energy consumption optimization data port for verification;
And the energy efficiency function test platform module judges the optimization effect of the energy efficiency management system to be tested by utilizing the result data of the real ship digital twin body simulation and the optimization data of the energy efficiency management system to be tested.
In some examples, the real ship digital twin body comprises:
The data storage scheduling module receives the full sailing data received by the transmission unit, classifies and stores the full sailing data into environment and sailing state data and real ship energy consumption data to simulate the sailing state of a real ship, and specifically comprises the following steps: simulating the navigation environment condition of the whole range, and taking the navigation environment condition as an optimization reference of the energy efficiency management system to be tested; simulating the fuel consumption of the whole voyage as a reference quantity for verification;
The virtual energy consumption database is used for artificially setting the navigation environment conditions of different navigation sections of the whole navigation range and predicting corresponding virtual energy consumption data; in addition, the navigation environment conditions of different navigation sections of the whole navigation range are set manually and used as optimization references of the energy efficiency management system to be tested.
In some examples, the data storage scheduling module, the virtual energy consumption database and the energy efficiency function evaluation platform are integrated into a system through a digital twin technology, and a three-dimensional view software is utilized to construct a man-machine interaction three-dimensional view scene comprising a continuous bridge region, a curved navigation section, an open water area and a limited water area of a ship (real ship) model, a ship (real ship) energy consumption model and a navigation section around the ship (real ship) navigation.
In some examples, simulating the full range navigation environment condition and the real fuel consumption condition with the navigation environment data received by the receiving unit; meanwhile, the simulated navigation environment condition is used as an optimization reference of the energy efficiency management system to be tested, so that real energy consumption optimization data are obtained, and the real energy consumption data are compared with the real energy consumption optimization data;
Setting navigation environment conditions of different navigation sections of the whole navigation range by people, and obtaining virtual energy consumption data according to a prediction model library after training; meanwhile, taking the navigation environment conditions of the artificially set different navigation sections of the full range as the optimization reference of the energy efficiency management system to be tested, thereby obtaining corresponding real energy consumption optimization data, and comparing the virtual energy consumption data with the real energy consumption optimization data;
If the real energy consumption data is larger than the real energy consumption optimization data, indicating that the optimization strategy of the energy efficiency management system to be tested is effective, otherwise, indicating that the optimization strategy of the energy efficiency management system to be tested is ineffective; and if the virtual energy consumption data is larger than the real energy consumption optimization data, the optimization strategy of the energy efficiency management system to be tested is effective, otherwise, the optimization strategy of the energy efficiency management system to be tested is ineffective.
In some examples, energy efficiency data of a real ship digital twin hull simulation is monitored: the method comprises the steps of dividing real-time data and historical data according to space and time; and dividing the operating data, navigation environment real-time data, trim optimization related data, optimization data derived by combining an intelligent algorithm, prediction data and energy efficiency evaluation data of the ship according to the content.
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The invention is described in further detail below with reference to the drawings and the detailed description.
Fig. 1 and 2 are block diagrams of functional verification platforms of a ship energy efficiency management system based on digital twinning.
Detailed Description
The invention discloses a digital twinning-based ship energy efficiency management system function verification platform. Through collecting a large number of ship navigation state parameters and combining machine learning and evaluation algorithms, a data-driven digital twin platform is constructed, and is used for verifying whether an energy efficiency management system developed for a real ship can achieve the effects of energy conservation and emission reduction. As shown in fig. 1 and fig. 2, the verification platform structure comprises a transmission unit, a data transmission interface, a data storage scheduling module, a virtual energy consumption database and an energy consumption function evaluation platform. The verification platform constructs a digital twin body capable of truly reflecting the geometric, physical, navigation posture and navigation environment conditions of a real ship by receiving energy efficiency data and ship type parameters of the real ship (namely, a ship to be applied by an energy efficiency management system to be tested), and derives a virtual energy consumption database by combining a machine learning technology; and establishing a connection of virtual space and real space, and establishing real-time full-state, multi-attribute and multi-scale mapping between the virtual space and the physical space by utilizing the function of digital twin body simulation through integrated sharing of data. And (3) carrying out energy consumption virtual simulation in the ship navigation process by utilizing the digital twin bodies, simultaneously carrying out energy efficiency optimization on the digital twin bodies of the real ship by docking the energy efficiency management system to be tested, and merging an intelligent algorithm as a tool for effectiveness analysis and comparison, and evaluating the effects of the energy efficiency management system to be tested before and after optimization by adopting two verification modes of real-real mode, real-virtual mode and the like. The platform has the initiative, has the functions of testing and verifying the energy efficiency management system products in a laboratory stage, eliminates the research and development cost and experimental trial-and-error cost generated in the process of installing the energy efficiency management system in a real ship test, improves the research and development efficiency of the energy efficiency system, and also eliminates human errors in the verification process. The invention provides technical support for verification and popularization of the ship energy efficiency management system.
The ship energy efficiency management system to be tested is provided by research personnel, and the energy efficiency optimization strategies of the developed energy efficiency management system are different according to the characteristics of different ships. The energy efficiency management system generally comprises a data acquisition unit, a data communication unit, a data processing unit and a data storage unit.
The data acquisition unit is used for acquiring ship propulsion system parameters, fuel consumption parameters and navigation environment parameters by utilizing various sensors. The various sensors comprise a dynamic torsion tester, an oil consumption meter, a temperature sensor, an anemometer, a log, a depth finder and a GPS (Beidou and the like can also be adopted). The dynamic torsion tester is used for collecting the rotating speed and the torque of the diesel generator and the motor, the oil consumption tester is used for collecting oil consumption data of the diesel engine, the wind speed and the wind direction tester is used for collecting the wind speed and the wind direction of the environment where the ship is located, the log is used for collecting the driving distance of the ship, the depth finder is used for collecting the water level depth of the water area where the ship is located, and the GPS is used for collecting the current position information of the ship.
The data communication unit comprises a serial port server, an Ethernet switch and a protocol converter. The data acquisition unit is connected with the serial port server through a serial communication interface, the serial port server is connected with the Ethernet switch through an Ethernet, the data processing unit and the data storage unit are respectively connected with the Ethernet switch, and the protocol converter is used for relay and protocol conversion.
The data storage unit is used for storing the parameters and the historical data acquired by the data acquisition unit, the parameters and the historical data are called by the data processing unit, and records of the data are stored on a hard disk of the server in a database mode.
The data processing unit is used for selecting a specific energy efficiency optimization strategy according to the data acquired by the data acquisition unit and the historical data and according to the ship characteristics, optimizing the performances of the real ship, such as energy consumption, navigational speed, pitching and the like according to the selected energy efficiency optimization strategy, and giving some auxiliary decisions according to the optimization result. The energy efficiency optimization strategy is to take a ship energy consumption model, a navigational speed optimization model and a pitching optimization model as objective functions and match a proper optimization algorithm at the same time, so that an optimal solution set meeting the constraint conditions of the corresponding models is obtained. The optimization algorithm comprises heuristic cluster intelligent algorithms such as a genetic algorithm, a particle swarm optimization algorithm, an ant colony algorithm, a simulated annealing algorithm and the like.
The ship energy consumption model takes the fuel consumption and emission of a ship energy efficiency management system to be tested as an objective function, combines ship power system parameters, ship type parameters and ship energy efficiency data, predicts the energy consumption and emission of the ship in a future period of time or obtains the real-time energy consumption and emission of the ship by utilizing a machine learning or intelligent optimization algorithm, and gives an auxiliary decision suggestion in terms of a diesel engine or a sailing speed.
The navigation speed optimizing model is used for considering the influence of factors such as navigation environment conditions, navigation postures, ship efficiency and the like on the navigation speed of the ship. The objective function generally has the following two aspects: 1. taking the voyage into consideration, namely optimizing the voyage speed of the ship under the condition of not delaying the cargo period; 2. and taking economic benefits into consideration, namely optimizing the navigational speed of the ship with the aim of maximizing the economic benefits or minimizing the energy consumption of the ship, and further carrying out navigation optimization decision.
The trim optimization model optimizes targets in various aspects related to ship strength, stability, loading capacity, poor draft and the like. In these objectives, the key issues considered are force optimization and stability optimization, both of which are linear programming issues. The stress optimization is to consider the longitudinal distribution of the container, the stability optimization is to consider the vertical distribution of the container, the two are independent of each other in a linear manner, and the optimal solution exists for the linear function programming problem to be solved. Firstly, carrying out primary optimization on longitudinal stress to obtain the weight distribution of the goods with the smallest total longitudinal bending moment borne by the cargo ship, and then carrying out secondary optimization on stability problems to obtain the weight distribution of the goods in each layer in the corresponding position.
The verification platform comprises a transmission unit, a data transmission interface, a real ship digital twin body, an energy efficiency function evaluation platform and a real energy consumption optimization data port.
The transmission unit is used for receiving navigation data of the object ship, which are acquired by various sensors on the object ship and applied by the ship energy efficiency management system to be tested, wherein the navigation data comprise energy consumption data and navigation environment data. The transmission unit comprises GPRS/CDMA with remote transmission capability, a data transmission station, spread spectrum microwave, a wireless bridge, satellite communication, short wave communication and other technologies.
The data transmission interface is in butt joint with the ship energy efficiency management system to be tested and is used for exchanging energy efficiency data. The data transmission interface can adopt DP, HDMI, VGA, DVI and other data interfaces. The data transmission interface exchanges data of two types: 1) Importing navigation process data of the simulated simulation of the real ship digital twin into a ship energy efficiency management system to be tested, and 2) transmitting an optimized result in the ship energy efficiency management system to be tested to the real energy consumption optimized data port in the verification platform for verification.
The real ship digital twin body is used for establishing the connection of virtual space and real space during ship operation, and the full-state, multi-attribute and multi-scale mapping between virtual space time and physical space time is established by utilizing the function of digital twin technology analog simulation through the integrated sharing of data such as navigation environment, ship state and navigation attitude.
The real ship digital twin body comprises a data storage scheduling module and a virtual energy consumption database, wherein the data storage scheduling module comprises an environment and navigation state data module and a real ship energy consumption data module, the virtual energy consumption database and the energy efficiency function evaluation platform are integrated into a visual system through a digital twin technology, and a three-dimensional view software is utilized to construct a three-dimensional view scene which comprises the three modules and has friendly man-machine interaction; the three-dimensional view scene can restore a real ship model, a real ship energy consumption model, a continuous bridge area of a sailing section around the sailing of the real ship, a curved sailing section, an open water area, a limited water area and the like at a computer display end.
The data storage scheduling module is used for receiving the data received by the transmission unit and storing the data into two parts of environment and navigation state data and real ship energy consumption data in a classified mode. The environment and voyage state data includes: navigation environment data, ship navigation posture, ship navigation parameters and the like; the data are stored and dispatched to the corresponding data processing ports according to preset attributes. The real ship energy consumption data comprises: data such as ship oil consumption, electricity consumption, gas consumption and various energy efficiency evaluation indexes; the data are stored and scheduled to the corresponding data processing port according to preset attributes for verification.
And the virtual energy consumption database derives virtual energy consumption data of the ship energy efficiency management system to be tested through an intelligent algorithm or machine learning, and serves as a data port to be verified. The virtual energy consumption database comprises a virtual data training module and a virtual energy consumption data generating module. The virtual data training module adopts a machine learning technology, takes data such as navigation environment, navigation posture and the like transmitted by the data storage scheduling module as input, takes energy consumption data as output, and trains mapping of other attributes such as energy consumption and the like of the real ship digital twin body under different working conditions; and storing the simulated energy consumption data as a data port to be verified.
The energy efficiency function evaluation platform module judges actual energy consumption data and energy efficiency optimization data through real-real evaluation modes and virtual-real evaluation modes so as to evaluate whether the ship energy efficiency management system to be tested has the effects of energy conservation and emission reduction.
The real-real evaluation mode is to compare the real energy consumption data with the real energy consumption optimization data; the virtual-real evaluation mode is to compare virtual energy consumption data simulated by the digital twin body with real energy consumption optimization data. Performing fuzzy evaluation on the comparison mode by using a logic threshold algorithm, if the real energy consumption data is larger than the real energy consumption optimization data, indicating that the optimization strategy of the energy efficiency management system to be tested is effective, otherwise, the optimization strategy of the energy efficiency management system to be tested is ineffective, and the energy saving effect is not achieved; if the virtual energy consumption data is larger than the real energy consumption optimization data, the optimization strategy of the surface energy efficiency management system to be tested is effective, otherwise, the optimization strategy of the surface energy efficiency management system to be tested is ineffective, and the energy saving effect is not achieved.
The online monitoring is a ship energy efficiency data monitor; the method comprises the steps of dividing real-time data and historical data according to space and time; the operation data (ship navigational speed, host power, torque, rotating speed and oil consumption), navigation environment real-time data (water flow speed and direction, wind speed and wind direction and water depth), trim optimization related data, optimization data derived by combining an intelligent algorithm, prediction data and energy efficiency evaluation data are divided according to the content. The monitoring module comprises: display, keyboard and mouse.
The hardware systems of the data processing unit and the data storage unit are industrial personal computers. The industrial personal computer is also connected with input equipment, a keyboard, a mouse and a display. The data communication units can be divided into two types according to the communication types: lower serial communication and upper Ethernet communication. The upper computer (i.e. the industrial personal computer) is connected to the Ethernet switch in an RS485 communication mode, the Ethernet switch is connected with each serial server in an optical fiber communication mode, and the serial servers are connected with each sensor in an RS485 communication mode. The human-computer interface display unit reads and displays the data acquired by the lower computer through the display, and displays the parameters of partial comprehensiveness after processing through the mathematical model.
The man-machine interaction interface aims at one-to-one etching of the actual ship information and the channel condition on the display effect. The interface is designed according to the total interface-subsystem layering. The interface can be divided into: interface one: three-dimensional view of real ship and channel information; interface II: real ship energy efficiency data (comprising real ship energy consumption data and energy efficiency optimization data); and (3) an interface III: virtual energy consumption database; and interface IV: a ship propulsion system model library module (a ship-machine-slurry model of a ship to which the energy efficiency management system to be tested is to be applied is constructed by checking or typing in parameters); interface five: virtual energy consumption optimizing database; interface six: and a validity verification platform. The layout of the interfaces is completed according to the pattern and control collocation mode.
Claims (3)
1. The utility model provides a ship energy efficiency management system function verification platform based on digital twin which characterized in that includes:
the transmission unit is used for receiving navigation data of the ship to be applied by the energy efficiency management system to be tested, wherein the navigation data comprise energy consumption data and navigation environment data;
The real ship digital twin body is a digital twin model of a ship and a navigation environment, the ship state and the history data of the navigation environment in the whole navigation process of the ship at the voyage time are integrated, the designed digital twin model is utilized to simulate the whole navigation state at the whole navigation time domain, a virtual real ship digital twin body is formed, and the designed real ship digital twin body is utilized to simulate and analyze the energy consumption data of the whole navigation time so as to verify the effectiveness of the energy efficiency management system to be tested; the real ship digital twin body comprises:
the data storage scheduling module receives the full sailing data from the transmission unit, classifies and stores the full sailing data into environment and sailing state data and energy consumption data to simulate the sailing state of a real ship, and specifically comprises the following steps: simulating the navigation environment condition of the whole range, and taking the navigation environment condition as an optimization reference of the energy efficiency management system to be tested; and simulating the fuel consumption of the whole voyage as a reference quantity for verification; and
The virtual energy consumption database is used for artificially setting the navigation environment conditions of different navigation sections of the whole navigation range and predicting corresponding virtual energy consumption data; in addition, the navigation environment conditions of different navigation sections of the whole navigation range are set manually and used as optimization references of the energy efficiency management system to be tested;
The data transmission interface is used for importing the navigation process data of the simulated simulation of the real ship digital twin body into the energy efficiency management system to be tested, and transmitting the optimized real energy consumption optimization data in the energy efficiency management system to be tested to a real energy consumption optimization data port for verification; and
The energy efficiency function evaluation platform judges the optimization effect of the energy efficiency management system to be tested by utilizing the result data of the real ship digital twin body simulation and the optimization data of the energy efficiency management system to be tested;
Integrating the data storage scheduling module, the virtual energy consumption database and the energy efficiency function evaluation platform into a system through a digital twin technology, and constructing a man-machine interaction three-dimensional view scene comprising the integrated system by utilizing three-dimensional view software, wherein the three-dimensional view scene comprises a continuous bridge area, a curved navigation section, an open water area and a limited water area for restoring a ship model, a ship energy consumption model and a navigation section around a ship navigation at a computer display end.
2. The digital twin based marine energy efficiency management system functional verification platform of claim 1,
Simulating the navigation environment condition and the real fuel consumption condition of the full range by using the navigation environment data received by the receiving unit; meanwhile, the simulated navigation environment condition is used as an optimization reference of the energy efficiency management system to be tested, so that real energy consumption optimization data are obtained, and the real energy consumption data are compared with the real energy consumption optimization data;
Setting navigation environment conditions of different navigation sections of the whole navigation range by people, and obtaining virtual energy consumption data according to a prediction model library after training; meanwhile, taking the navigation environment conditions of the artificially set different navigation sections of the full range as the optimization reference of the energy efficiency management system to be tested, thereby obtaining corresponding real energy consumption optimization data, and comparing the virtual energy consumption data with the real energy consumption optimization data;
If the real energy consumption data is larger than the real energy consumption optimization data, indicating that the optimization strategy of the energy efficiency management system to be tested is effective, otherwise, indicating that the optimization strategy of the energy efficiency management system to be tested is ineffective; and if the virtual energy consumption data is larger than the real energy consumption optimization data, the optimization strategy of the energy efficiency management system to be tested is effective, otherwise, the optimization strategy of the energy efficiency management system to be tested is ineffective.
3. The digital twin based marine energy efficiency management system functional verification platform of claim 1, wherein energy efficiency data of a real marine digital twin simulation is monitored: the method comprises the steps of dividing real-time data and historical data according to space and time; and dividing the operating data, navigation environment real-time data, trim optimization related data, optimization data derived by combining an intelligent algorithm, prediction data and energy efficiency evaluation data of the ship according to the content.
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