CN115408892B - Virtual-real interaction method and system for hydraulic pump - Google Patents
Virtual-real interaction method and system for hydraulic pump Download PDFInfo
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Abstract
The invention relates to the technical field of aviation hydraulic pumps, in particular to a virtual-real interaction method and system for a hydraulic pump. The virtual-real interaction method of the hydraulic pump comprises the following steps: establishing a one-dimensional performance simulation model for simulation analysis based on the performance requirement of the hydraulic pump to obtain the design parameters of the hydraulic pump; establishing a three-dimensional simulation model based on the design parameters; establishing a digital twin model based on the one-dimensional performance simulation model and the three-dimensional simulation model; based on the real-time environmental data and/or the existing environmental data, the working data of the hydraulic pump drives the digital twin model to obtain the simulation data of the hydraulic pump; based on the simulation data, a state of the hydraulic pump is diagnosed and/or predicted. Therefore, the problems of long iterative updating time and low efficiency of the hydraulic pump in the whole life cycle are solved. The invention also provides a virtual-real interaction system of the hydraulic pump, which comprises a physical unit, a digital twin unit and a virtual-real interaction unit.
Description
Technical Field
The invention relates to the technical field of aviation hydraulic pumps, in particular to a virtual-real interaction method and system for a hydraulic pump.
Background
The hydraulic pump is a power element of a hydraulic system, and is an element which is driven by an engine or an electric motor, sucks low-pressure hydraulic oil from an inlet, discharges high-pressure hydraulic oil from an outlet, and delivers the hydraulic oil to an actuating element. The aviation hydraulic pump is a core component of an aircraft hydraulic system, provides energy for take-off, operation, undercarriage retraction and braking of an aircraft, and requires continuous and reliable operation in the whole flight process.
From the design and manufacture of the hydraulic pump to the use and maintenance until the hydraulic pump is scrapped, in the whole life cycle of the hydraulic pump, because huge requirements and environmental differences exist in each link, the hydraulic pump is long in updating iteration time and low in efficiency in the manufacturing process, and after problems occur in the use process and the maintenance process.
Disclosure of Invention
The invention provides a virtual-real interaction method and system for a hydraulic pump, and aims to solve the problems of long iterative update time and low efficiency of the hydraulic pump in the whole life cycle.
In a first aspect, the present invention provides a virtual-real interaction method for a hydraulic pump, including:
the virtual-real interaction method of the hydraulic pump comprises the following steps:
s11, establishing a one-dimensional performance simulation model for simulation analysis based on the performance requirement of the hydraulic pump to obtain the design parameters of the hydraulic pump;
s12, establishing a three-dimensional simulation model based on the design parameters; the three-dimensional simulation model comprises one or more combinations of a pressure flow model, a friction pair heat-flow-solid coupling model, a shell temperature rise model and a rotating assembly rigid-flexible coupling model;
s13, establishing a digital twin model based on the one-dimensional performance simulation model and the three-dimensional simulation model;
step S14, based on real-time environment data and/or existing environment data, the working data of the hydraulic pump drives the digital twin model to obtain simulation data of the hydraulic pump;
step S15, diagnosing and/or predicting the state of the hydraulic pump based on the simulation data.
Preferably, the first and second liquid crystal materials are,
the step S11 includes:
step S111, obtaining a first design parameter of the hydraulic pump based on the performance requirement of the hydraulic pump;
step S112, establishing the one-dimensional performance simulation model based on the performance requirement of the hydraulic pump;
and S113, inputting the first design parameter into the one-dimensional performance simulation model for iterative optimization to obtain the design parameter.
In a preferred embodiment of the method of the invention,
the step S12 includes:
step S121, establishing a first three-dimensional simulation model based on the design parameters;
step S122, performing iterative optimization on the design parameters based on simulation calculation analysis of the first three-dimensional simulation model to obtain second design parameters;
step S123, inputting the second design parameter into the one-dimensional performance simulation model for iterative optimization to obtain a third design parameter;
step S124, optimizing the first three-dimensional simulation model based on the third design parameter to obtain the three-dimensional simulation model; the three-dimensional simulation model comprises one or more combinations of a pressure flow model, a friction pair heat-flow-solid coupling model, a shell temperature rise model and a rotating assembly rigid-flexible coupling model.
Preferably, the first and second liquid crystal materials are,
the step S13 includes:
step S131, performing order reduction processing on the three-dimensional simulation model to obtain a reduced-order three-dimensional simulation model; the reduced-order three-dimensional simulation model comprises one or more combinations of a reduced-order back friction pair heat-flow-solid coupling model, a reduced-order back shell temperature rise model, a reduced-order back pressure flow model and a reduced-order back rotating assembly rigid-flexible coupling model; the reduced-order rear friction pair heat-flow-solid coupling model comprises one or more combinations of a reduced-order rear sliding shoe friction pair heat-flow-solid coupling model, a reduced-order rear plunger friction pair heat-flow-solid coupling model and a reduced-order rear flow distribution friction pair heat-flow-solid coupling model;
and S132, merging the reduced three-dimensional simulation model into the one-dimensional performance simulation model to obtain the digital twin model.
Preferably, the first and second liquid crystal materials are,
the step S131 of performing order reduction processing on the three-dimensional simulation model to obtain the reduced three-dimensional simulation model includes:
carrying out simulation analysis on the three-dimensional simulation model to obtain training sample data;
and training a neural network based on the training sample data to obtain the data-driven reduced three-dimensional simulation model.
Preferably, the first and second liquid crystal materials are,
the real-time environment data comprises real-time environment data of the normal working condition of the hydraulic pump, real-time environment data of the extreme working condition of the hydraulic pump and real-time environment data of the fault working condition of the hydraulic pump;
the existing environmental data comprises environmental data stored under the normal working condition of the hydraulic pump, environmental data stored under the extreme working condition of the hydraulic pump and environmental data stored under the fault working condition of the hydraulic pump.
Preferably, the first and second liquid crystal materials are,
the step S15 includes:
step S151, generating a fault diagnosis model and/or a life prediction model based on the simulation data;
step S152, inputting the working data into the fault diagnosis model, and judging the fault state and/or the fault type of the hydraulic pump;
and step S153, inputting the working data into the service life prediction model, and predicting the residual service life of the hydraulic pump.
Preferably, the first and second liquid crystal materials are,
the virtual-real interaction method of the hydraulic pump further comprises the following steps:
and S16, visualizing one or more combinations of the three-dimensional simulation model, the digital twin model, the simulation data, the fault state, the fault type and the residual service life.
In a second aspect, the present invention provides a virtual-real interaction system for a hydraulic pump, including:
the hydraulic pump virtual-real interaction system performs virtual-real interaction through the hydraulic pump virtual-real interaction method in any one of the first aspect; the hydraulic pump virtual-real interaction system comprises: a physical unit, a digital twin unit and a virtual-real interaction unit; wherein the content of the first and second substances,
the physical unit is used for placing the hydraulic pump under different environmental conditions and operating in multiple working modes; collecting environmental data under different environmental conditions and working data under various working modes;
the digital twinning unit is used for establishing a digital twinning model based on the performance requirement of the hydraulic pump; performing simulation analysis based on the input data to obtain simulation data;
the virtual-real interaction unit is used for carrying out data communication on the physical unit and the digital twin unit; or analyzing and processing the received output data of the physical unit and/or the digital twin unit, and inputting the analyzed and processed data into the physical unit and/or the digital twin unit.
Preferably, the first and second liquid crystal materials are,
the physical unit comprises the hydraulic pump, a sensor, a working condition test bed, a fault test bed and a service life test bed; the sensors are arranged on the periphery and/or inside the hydraulic pump, the working condition test bed, the fault test bed and the service life test bed and are used for acquiring the environmental data and/or the working data;
the digital twin unit comprises a one-dimensional performance simulation model, a three-dimensional simulation model, a digital twin model, a fault diagnosis model and a service life prediction model; establishing the digital twin model based on the one-dimensional performance simulation model and the three-dimensional simulation model; generating a fault diagnosis model and/or a life prediction model based on simulation data of the digital twin model simulation analysis;
the virtual-real interaction unit comprises an interaction interface module, a data standardization module, a data analysis processing module, a digital-analog fusion module, a human-computer interaction visualization module and a data management module; the interactive interface module is used for carrying out data communication on the physical unit and the digital twin unit; the data standardization module is used for carrying out one or more of data cleaning, data conversion, data integration and data reduction on the received data; the digital-analog fusion module is used for optimizing a model in the digital twin unit after comparing the physical unit output data with the digital twin unit output data; or the digital-analog fusion module is used for outputting the environmental data and/or the working data simulated by the digital twin unit to the physical unit; the data analysis processing module is used for analyzing and processing the simulation data to obtain a diagnosis and/or prediction result; the human-computer interaction visualization module is used for displaying data in the hydraulic pump virtual-real interaction system; the data management module is used for storing data in the virtual-real interaction system of the hydraulic pump.
In order to solve the problems of long iterative update time and low efficiency of the hydraulic pump in the whole life cycle, the invention has the following advantages:
1, establishing a one-dimensional performance simulation model and a three-dimensional simulation model according to the performance requirements of the hydraulic pump. And establishing a final digital twin model through the one-dimensional performance simulation model and the three-dimensional simulation model. Through simulation analysis of the digital twin model, final design parameters meeting the performance requirements of the hydraulic pump can be obtained, and design and manufacture of the hydraulic pump are completed.
2 because the three-dimensional simulation model comprises one or more combinations of a pressure flow model, a friction pair heat-flow-solid coupling model, a shell temperature rise model and a rotating assembly rigid-flexible coupling model, the working condition of the hydraulic pump can be accurately and comprehensively simulated, so that a model base is made for better updating the iterative hydraulic pump and the iterative efficiency is improved.
3. By carrying out work simulation on the digital twin model of the hydraulic pump in actual environment data and/or existing environment data, the working condition of the hydraulic pump can be accurately simulated so as to diagnose and/or predict the state of the hydraulic pump.
Drawings
FIG. 1 is a schematic diagram illustrating a virtual-real interaction method of a hydraulic pump according to an embodiment;
FIG. 2 is a schematic diagram illustrating a virtual-real interaction method of a hydraulic pump according to another embodiment;
FIG. 3 is a schematic diagram of an embodiment of a virtual-real interaction system of a hydraulic pump;
fig. 4 shows a schematic diagram of a virtual-real interactive system of a hydraulic pump according to another embodiment.
Reference numerals:
in the figure: 10 is a physical unit;
11 is a hydraulic pump;
12 is a sensor;
13 is a working condition test bed;
14 is a fault test bed;
15 is a life test stand;
20 is a digital twin unit;
21 is a one-dimensional performance simulation model;
22 is a three-dimensional simulation model;
23 is a digital twinning model;
24 is a fault diagnosis model;
25 is a life prediction model;
30 is a virtual-real interaction unit;
31 is an interactive interface module;
32 is a data standardization module;
33 is a data analysis processing module;
34 is a digital-analog fusion module;
35 is a human-computer interaction visualization module;
and 36 is a data management module.
Detailed Description
The disclosure will now be discussed with reference to several exemplary embodiments. It should be understood that these embodiments are discussed only to enable those of ordinary skill in the art to better understand and thus implement the present disclosure, and are not intended to imply any limitation on the scope of the present disclosure.
As used herein, the term "include" and its variants are to be read as open-ended terms meaning "including, but not limited to. The term "based on" is to be read as "based, at least in part, on". The terms "one embodiment" and "an embodiment" are to be read as "at least one embodiment". The term "another embodiment" is to be read as "at least one other embodiment".
The embodiment discloses a virtual-real interaction method for a hydraulic pump 11, as shown in fig. 1, the method may include:
the virtual-real interaction method of the hydraulic pump 11 may include:
step S11, establishing a one-dimensional performance simulation model 21 for simulation analysis based on the performance requirement of the hydraulic pump 11 to obtain the design parameters of the hydraulic pump 11;
step S12, establishing a three-dimensional simulation model 22 based on design parameters; the three-dimensional simulation model 22 may include one or more combinations of a pressure flow model, a friction pair heat-flow-solid coupling model, a shell temperature rise model, and a rotating assembly rigid-flexible coupling model;
s13, establishing a digital twin model 23 based on the one-dimensional performance simulation model 21 and the three-dimensional simulation model 22;
step S14, based on the real-time environment data and/or the existing environment data, the working data of the hydraulic pump 11 drives the digital twin model 23 to obtain the simulation data of the hydraulic pump 11;
step S15 diagnoses and/or predicts the state of the hydraulic pump 11 based on the simulation data.
In this embodiment, as shown in fig. 4, the virtual-real interaction method of the hydraulic pump 11 can be implemented in the virtual-real interaction system of the hydraulic pump 11. The virtual-real interactive system of the hydraulic pump 11 may include a physical unit 10, a digital twin unit 20, and a virtual-real interactive unit 30. The physical unit 10 may be configured to operate the hydraulic pump 11 in multiple working modes under different working conditions, and collect environmental data under the working conditions and working data in the multiple working modes. The digital twin unit 20 can be modeled in a variety of ways depending on the performance requirements of the hydraulic pump 11. And carrying out simulation analysis based on various models to obtain simulation data. The virtual-real interaction unit 30 may communicate data between the physical unit 10 and the digital twin unit 20, and may further analyze data output by the physical unit 10 and/or the digital twin unit 20, and input the analyzed data into the physical unit 10 and/or the digital twin unit 20. As shown in fig. 1, the virtual-real interaction method of the hydraulic pump 11 may include steps S11 to S15, and each step is described in detail as follows:
in step S11, a one-dimensional performance simulation model 21 may be established by using system modeling software such as Amesim based on performance requirements of the user on the hydraulic pump 11 (such as pressure, flow rate, vibration, noise, and shape and size of the volume of the hydraulic pump 11), so as to implement matching of the overall configuration layout and detailed design parameters of the hydraulic pump 11. Through simulation analysis of the one-dimensional performance simulation model 21, the design parameters of the hydraulic pump 11 are finally obtained, and further modeling work is conveniently completed. In other embodiments, as shown in fig. 2, step S11 may further include step S111 to step S113, specifically: in step S111, a first design parameter of the hydraulic pump 11 may be calculated by using some design formula or similar existing design model of the hydraulic pump 11 based on the performance requirement of the hydraulic pump 11 (such as the pressure, flow rate, vibration, noise and volume of the hydraulic pump 11) of the user. In step S112, a one-dimensional performance simulation model 21 may be established by using system modeling software such as Amesim based on the performance requirements of the user on the hydraulic pump 11 (such as the pressure, flow rate, vibration, noise and volume of the hydraulic pump 11). Step S113, the first design parameter of the hydraulic pump 11 may be input into the one-dimensional performance simulation model 21 for calculation to obtain an intermediate design parameter; the intermediate design parameters may be input into the one-dimensional performance simulation model 21 again for calculation, and the design parameters of the hydraulic pump 11 are finally obtained through such a plurality of iterative optimization calculations.
Step S12, a three-dimensional simulation model 22 may be established for the hydraulic pump 11 by using three-dimensional modeling software according to the obtained design parameters of the hydraulic pump 11. Through the established three-dimensional simulation model 22, the geometrical structure of each component of the hydraulic pump 11 and the relation between each component can be accurately obtained. The three-dimensional simulation model 22 may include one or more combinations of a pressure flow model in the hydraulic pump 11, a friction pair heat-flow-solid coupling model, a shell temperature rise model, and a rotating assembly rigid-flexible coupling model. The pressure-flow rate model is mainly expressed as a variation relation between the internal pressure and the flow rate of the hydraulic pump 11; the friction pair heat-flow-solid coupling model is mainly expressed as the change relation of the power loss, the leakage amount, the temperature and the pressure distribution of the friction pair when the hydraulic pump 11 works; the shell temperature rise model is mainly expressed as the change relation of the shell temperature when the hydraulic pump 11 works; the rigid-flexible coupling model of the rotating assembly mainly represents the mode of the rotating assembly when the hydraulic pump 11 works. In other embodiments, as shown in fig. 2, step S12 may further include steps S121 to S124, specifically: in step S121, a first three-dimensional simulation model 22 may be established for the hydraulic pump 11 by using three-dimensional modeling software according to the obtained design parameters of the hydraulic pump 11. The first three-dimensional simulation model 22 may derive the geometry of and the relationship between the various components of the hydraulic pump 11. In step S122, a simulation calculation analysis may be performed based on the physical relationship between the components in the first three-dimensional simulation model 22, so as to optimize and iterate the design parameters of the hydraulic pump 11, and obtain a second design parameter. Step S123, the second design parameter may be input into the one-dimensional performance simulation model 21 for simulation calculation and analysis, and the design parameter of the hydraulic pump 11 is optimized and iterated again to obtain a third design parameter. In some further embodiments, during the iterative optimization process of the data, steps S121 to S123 may be repeated multiple times, so as to obtain the third design parameter. In step S124, the first three-dimensional simulation model 22 may be optimized based on the finally obtained third design parameter, so as to obtain the three-dimensional simulation model 22. In still other embodiments, since steps S121 to S123 may be repeated a plurality of times, a second three-dimensional simulation model 22 that iterates on the basis of the first three-dimensional simulation model 22 may also be obtained in step S121. The second three-dimensional simulation model 22 may be optimized based on the finally obtained third design parameter, resulting in the three-dimensional simulation model 22. The three-dimensional simulation model 22 thus obtained is closer to the real requirements of the user, so that the establishment of the three-dimensional simulation model 22 of the hydraulic pump 11 is better completed, and the subsequent work is facilitated.
In step S13, the one-dimensional performance simulation model 21 and/or the three-dimensional simulation model 22 include a plurality of models having independent functions or structures. The one-dimensional performance simulation model 21 and the three-dimensional simulation model 22 can be combined to establish the digital twin model 23, so that the simulation model of the hydraulic pump 11 can be conveniently subjected to comprehensive analysis, and simulation analysis data close to the actual situation can be obtained. In other embodiments, as shown in fig. 2, step S13 may further include steps S131 to S132, specifically: in step S131, since the three-dimensional simulation model 22 accurately expresses the actual condition of the hydraulic pump 11, a large amount of time is consumed to obtain the simulation analysis result when the three-dimensional simulation model 22 performs the simulation analysis. This tends to be disadvantageous for the hydraulic pump 11 to update the iteration quickly. Therefore, the three-dimensional simulation model 22 can be subjected to order reduction processing to obtain the three-dimensional simulation model 22 after order reduction. The process of the order reduction process may include: carrying out simulation analysis on the three-dimensional simulation model 22 under different working environments and working parameters to obtain a large amount of simulation analysis data; these simulation analysis data can then be used as training sample data to train the neural network, and finally the data-driven reduced-order three-dimensional simulation model 22 is obtained. The reduced-order three-dimensional simulation model 22 thus obtained can obtain simulation analysis results in a shorter time, thereby speeding up the update iteration of the hydraulic pump 11. In step S132, in step S131, the key component model and/or the complex mechanism model in the three-dimensional simulation model 22 of the hydraulic pump 11 may be subjected to a reduction process. The reduced-order three-dimensional simulation model 22 obtained by reducing the models can be fused into the one-dimensional performance simulation model 21 to replace part of the one-dimensional performance simulation model 21, so that a complete digital twin model 23 is formed. The obtained digital twin model 23 can accurately perform simulation analysis and quickly obtain a simulation result.
Step S14, the real-time environment data and/or the stored working environment data of the hydraulic pump 11 during working can be applied to the digital twin model 23 through the virtual-real interaction unit 30, and the working data of the digital twin model 23 of the hydraulic pump 11 is set for simulation analysis, so as to obtain the simulation data of the hydraulic pump 11 finally. The real-time environment data may be environment data of the physical unit 10 when the hydraulic pump 11 is operated. The virtual-real interaction unit 30 applies the working environment data of the hydraulic pump 11 to the digital twin model 23 in real time, so that the real working condition of the hydraulic pump 11 can be accurately simulated, and diagnosis and/or prediction can be made in time. Since the actual working position of the hydraulic pump 11 varies with the change of the aircraft, the environmental real-time data of its operation cannot be applied to the digital twin model 23. The existing environment data may be already stored working environment data. By applying the existing environmental data to the digital twin model 23, the actual working condition of the hydraulic pump 11 can be simulated more accurately, and therefore diagnosis and/or prediction can be made reasonably. In the process of carrying out simulation analysis on the digital twin model 23, normal working data can be input into the digital twin model 23, and fault working data can be input into the digital twin model 23 for fault mechanism analysis. And life endurance simulation analysis can be carried out through the digital twin model 23, so that performance degradation mechanism simulation data can be obtained.
In step S15, the simulation data may be analyzed to diagnose and/or predict the state of the hydraulic pump 11. Furthermore, an optimized iterative design of the hydraulic pump 11 can again be carried out as a result of the diagnosis and/or prediction. In other embodiments, as shown in fig. 2, step S15 may further include steps S151 to S153, specifically: in step S151, the fault diagnosis model 24 may be created by a machine learning algorithm using simulation data obtained by inputting the fault data into the digital twin model 23 and performing the fault mechanism analysis in step S14. The life-span durability simulation analysis can also be carried out on the digital twin model 23 in the step S14, and the artificial intelligence algorithm is adopted to establish the life-span prediction model 25 according to the performance degradation mechanism simulation data. In step S152, the working data may be input into the fault diagnosis model 24 to determine the fault state and/or the fault type of the hydraulic pump 11, so as to facilitate the next processing of the hydraulic pump 11 by the user and/or the maintenance personnel. In step S153, the working data may be input into the life prediction model 25 to predict the remaining life of the hydraulic pump 11, so that the maintenance personnel can prepare spare parts of the hydraulic pump 11 and make a maintenance plan.
In some embodiments of the present invention, the,
the virtual-real interaction method of the hydraulic pump 11 may further include:
and step S16, visualizing one or more combinations of the three-dimensional simulation model 22, the digital twin model 23, the simulation data, the fault state, the fault type and the residual service life.
In this embodiment, the virtual-real interaction method of the hydraulic pump 11 may further include step S16, and the virtual-real interaction system of the hydraulic pump 11 may visually display one or more combinations of the three-dimensional simulation model 22, the digital twin model 23, the simulation data, the fault state, the fault type, and the remaining life. Through the visual display mode, the user can know the state of the hydraulic pump 11 more intuitively and vividly, and further judgment and processing can be made more accurately.
The embodiment discloses a virtual-real interaction system of a hydraulic pump 11, which may include:
the virtual-real interaction system of the hydraulic pump 11 performs virtual-real interaction by using the virtual-real interaction method of the hydraulic pump 11 according to any one of the above embodiments; as shown in fig. 3, the virtual-real interactive system of the hydraulic pump 11 may include: a physical unit 10, a digital twin unit 20 and a virtual-real interaction unit 30; wherein the content of the first and second substances,
the physical unit 10 is used for placing the hydraulic pump 11 in different environmental conditions to operate in multiple working modes; collecting environmental data under different environmental conditions and working data under various working modes;
a digital twin unit 20 for establishing a digital twin model 23 based on the performance requirements of the hydraulic pump 11; carrying out simulation analysis based on the input data to obtain simulation data;
the virtual-real interaction unit 30 is used for carrying out data communication between the physical unit 10 and the digital twin unit 20; or, analyzing the received data output by the physical unit 10 and/or the digital twin unit 20, and inputting the analyzed data into the physical unit 10 and/or the digital twin unit 20.
In this embodiment, as shown in fig. 3, the virtual-real interaction system of the hydraulic pump 11 may include: a physical unit 10, a digital twin unit 20 and a virtual-real interaction unit 30. The physical unit 10 and the digital twin unit 20 may be in data communication through a virtual-real interaction unit 30. The physical unit 10 may include a physical hydraulic pump 11 operating in a laboratory simulated work environment, and collects simulated environmental data and work data of the hydraulic pump 11. The physical unit 10 may further include a real object hydraulic pump 11 operating in an actual working environment due to a difference between the simulated working environment data and the actual working environment data, and collects the actual working environment data and the working data of the hydraulic pump 11. The digital twin unit 20 can establish various digital twin models 23 by the performance requirements of the hydraulic pump 11. Simulation data can be obtained by performing simulation analysis through the number twin character models. The virtual-real interaction unit 30 may receive data output by the physical unit 10 and/or the digital twin unit 20, and analyze and process the data to obtain processed data. The virtual-real interaction unit 30 may also input these processed data to the physical unit 10 and/or the digital twin unit 20. The hydraulic pump 11 in the physical unit 10 can be operated according to the data inputted from the virtual-real interaction unit 30. The digital twin unit 20 can also perform simulation analysis according to the data input by the virtual-real interaction unit 30.
In some embodiments, as shown in figure 4,
the physical unit 10 may include a hydraulic pump 11, a sensor 12, a working condition test bed 13, a fault test bed 14, and a life test bed 15; the sensor 12 is arranged on the periphery and/or inside the hydraulic pump 11, the working condition test bed 13, the fault test bed 14 and the service life test bed 15 and is used for collecting environmental data and/or working data;
the digital twin unit 20 may include a one-dimensional performance simulation model 21, a three-dimensional simulation model 22, a digital twin model 23, a fault diagnosis model 24, a life prediction model 25; establishing a digital twin model 23 based on the one-dimensional performance simulation model 21 and the three-dimensional simulation model 22; generating a fault diagnosis model 24 and/or a life prediction model 25 based on simulation data of the simulation analysis of the digital twin model 23;
the virtual-real interaction unit 30 may include an interaction interface module 31, a data standardization module 32, a data analysis processing module 33, a digital-analog fusion module 34, a human-computer interaction visualization module 35, and a data management module 36; the interactive interface module 31 is used for data communication between the physical unit 10 and the digital twin unit 20; the data standardization module 32 is used for performing one or more of data cleaning, data conversion, data integration and data reduction on the received data; the digital-analog fusion module 34 is configured to optimize a model in the digital twin unit 20 after comparing data output by the physical unit 10 with data output by the digital twin unit 20; or, the digital-analog fusion module 34 is configured to output the environmental data and/or the working data simulated by the digital twin unit 20 to the physical unit 10; the data analysis processing module 33 is used for analyzing and processing the simulation data to obtain a diagnosis and/or prediction result; the human-computer interaction visualization module 35 is used for displaying data in the virtual-real interaction system of the hydraulic pump 11; the data management module 36 is used for storing data in the virtual-real interactive system of the hydraulic pump 11.
In the present embodiment, as shown in fig. 4, the physical unit 10 may include a hydraulic pump 11, a sensor 12, a condition test stand 13, a failure test stand 14, and a life test stand 15. The condition test stand 13 may provide environmental and operational parameters for various conditions to operate the hydraulic pump 11. The plurality of operating conditions may include standard operating conditions, high load operating conditions, high temperature operating conditions, high altitude operating conditions, and vibration operating conditions. The failure test stand 14 can inject some failures into the hydraulic pump 11 and operate. The life test stand 15 may provide environmental and operational parameters for normal or accelerated life to operate the hydraulic pump 11. The sensors 12 may be disposed around and/or inside the hydraulic pump 11, the operation condition test stand 13, the failure test stand 14, and the life test stand 15, and are used to collect environmental data and/or operational data.
The digital twin unit 20 may include a one-dimensional performance simulation model 21, a three-dimensional simulation model 22, a digital twin model 23, a fault diagnosis model 24, and a life prediction model 25. The digital twin unit 20 can establish a one-dimensional performance simulation model 21 through the performance requirements of the hydraulic pump 11. Design parameters are obtained through simulation analysis of the one-dimensional performance simulation model 21. The digital twin unit 20 may build a three-dimensional simulation model 22 through design parameters. Establishing a digital twin model 23 based on the one-dimensional performance simulation model 21 and the three-dimensional simulation model 22; based on simulation data of the simulation analysis of the digital twin model 23, a fault diagnosis model 24 and/or a life prediction model 25 are generated. The digital twin unit 20 may also perform simulation analysis according to the data input by the virtual-real interaction unit 30 or the data of the self simulation analysis, so as to obtain a simulation result.
The virtual-real interaction unit 30 may include an interaction interface module 31, a data standardization module 32, a data analysis processing module 33, a digital-analog fusion module 34, a human-computer interaction visualization module 35, and a data management module 36. The interactive interface module 31 may be used to put the physical unit 10 and the digital twin unit 20 in data communication; the data normalization module 32 may be configured to perform one or more of data cleansing, data transformation, data integration, and data reduction on the received data. The digital-to-analog fusion module 34 may be configured to optimize a model in the digital twin unit 20 after comparing the data output by the physical unit 10 with the data output by the digital twin unit 20. Alternatively, the digital-to-analog fusion module 34 may be configured to output the environmental data and/or the working data simulated by the digital twin unit 20 to the physical unit 10. The data analysis processing module 33 may be configured to analyze the process based on the simulation data to obtain a diagnosis and/or prediction result. The human-computer interaction visualization module 35 can be used for displaying data in the virtual-real interaction system of the hydraulic pump 11. The data management module 36 may be used to store data in the virtual-real interactive system of the hydraulic pump 11.
It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of the present disclosure and that various changes in form and details may be made therein without departing from the spirit and scope of the present disclosure in practice.
Claims (9)
1. A virtual-real interaction method of a hydraulic pump is characterized in that,
the virtual-real interaction method of the hydraulic pump comprises the following steps:
s11, establishing a one-dimensional performance simulation model for simulation analysis based on the performance requirement of the hydraulic pump to obtain the design parameters of the hydraulic pump;
s12, establishing a three-dimensional simulation model based on the design parameters; the three-dimensional simulation model comprises one or more combinations of a pressure flow model, a friction pair heat-flow-solid coupling model, a shell temperature rise model and a rotating assembly rigid-flexible coupling model;
s13, establishing a digital twin model based on the one-dimensional performance simulation model and the three-dimensional simulation model; wherein the step S13 includes:
step S131, performing order reduction processing on the three-dimensional simulation model to obtain a reduced-order three-dimensional simulation model; the reduced-order three-dimensional simulation model comprises one or more combinations of a reduced-order back friction pair heat-flow-solid coupling model, a reduced-order back shell temperature rise model, a reduced-order back pressure flow model and a reduced-order back rotating assembly rigid-flexible coupling model; the reduced-order rear friction pair heat-flow-solid coupling model comprises one or more combinations of a reduced-order rear sliding shoe friction pair heat-flow-solid coupling model, a reduced-order rear plunger friction pair heat-flow-solid coupling model and a reduced-order rear flow distribution friction pair heat-flow-solid coupling model;
step S132, merging the reduced three-dimensional simulation model into the one-dimensional performance simulation model to obtain the digital twin model;
step S14, based on real-time environment data and/or existing environment data, the working data of the hydraulic pump drives the digital twin model to obtain simulation data of the hydraulic pump;
step S15, diagnosing and/or predicting the state of the hydraulic pump based on the simulation data.
2. The virtual-real interaction method of the hydraulic pump according to claim 1,
the step S11 includes:
step S111, obtaining a first design parameter of the hydraulic pump based on the performance requirement of the hydraulic pump;
step S112, establishing the one-dimensional performance simulation model based on the performance requirement of the hydraulic pump;
and S113, inputting the first design parameter into the one-dimensional performance simulation model for iterative optimization to obtain the design parameter.
3. The virtual-real interaction method of the hydraulic pump according to claim 1,
the step S12 includes:
step S121, establishing a first three-dimensional simulation model based on the design parameters;
step S122, performing iterative optimization on the design parameters based on simulation calculation analysis of the first three-dimensional simulation model to obtain second design parameters;
step S123, inputting the second design parameter into the one-dimensional performance simulation model for iterative optimization to obtain a third design parameter;
step S124, optimizing the first three-dimensional simulation model based on the third design parameter to obtain the three-dimensional simulation model; the three-dimensional simulation model comprises one or more combinations of a pressure flow model, a friction pair heat-flow-solid coupling model, a shell temperature rise model and a rotating assembly rigid-flexible coupling model.
4. The virtual-real interaction method of the hydraulic pump according to claim 1,
the step S131 of performing order reduction processing on the three-dimensional simulation model to obtain the reduced three-dimensional simulation model includes:
carrying out simulation analysis on the three-dimensional simulation model to obtain training sample data;
and training a neural network based on the training sample data to obtain the data-driven reduced three-dimensional simulation model.
5. The virtual-real interaction method of the hydraulic pump according to claim 1,
the real-time environment data comprises real-time environment data of the normal working condition of the hydraulic pump, real-time environment data of the extreme working condition of the hydraulic pump and real-time environment data of the fault working condition of the hydraulic pump;
the existing environmental data comprises environmental data stored under the normal working condition of the hydraulic pump, environmental data stored under the extreme working condition of the hydraulic pump and environmental data stored under the fault working condition of the hydraulic pump.
6. The virtual-real interaction method of the hydraulic pump according to claim 1,
the step S15 includes:
step S151, generating a fault diagnosis model and/or a life prediction model based on the simulation data;
step S152, inputting the working data into the fault diagnosis model, and judging the fault state and/or the fault type of the hydraulic pump;
and step S153, inputting the working data into the service life prediction model, and predicting the residual service life of the hydraulic pump.
7. The virtual-real interaction method of the hydraulic pump according to claim 6,
the virtual-real interaction method of the hydraulic pump further comprises the following steps:
and S16, visualizing one or more combinations of the three-dimensional simulation model, the digital twin model, the simulation data, the fault state, the fault type and the residual service life.
8. A virtual-real interactive system of a hydraulic pump is characterized in that,
the hydraulic pump virtual-real interaction system carries out virtual-real interaction through the hydraulic pump virtual-real interaction method as claimed in any one of claims 1~7; the hydraulic pump virtual-real interaction system comprises: a physical unit, a digital twin unit and a virtual-real interaction unit; wherein, the first and the second end of the pipe are connected with each other,
the physical unit is used for placing the hydraulic pump under different environmental conditions and operating in multiple working modes; collecting environmental data under different environmental conditions and working data under various working modes;
the digital twinning unit is used for establishing a digital twinning model based on the performance requirement of the hydraulic pump; performing simulation analysis based on the input data to obtain simulation data;
the virtual-real interaction unit is used for carrying out data communication on the physical unit and the digital twin unit; or analyzing and processing the received output data of the physical unit and/or the digital twin unit, and inputting the analyzed and processed data into the physical unit and/or the digital twin unit.
9. The virtual-real interaction system of a hydraulic pump according to claim 8,
the physical unit comprises the hydraulic pump, a sensor, a working condition test bed, a fault test bed and a service life test bed; the sensors are arranged on the periphery and/or inside the hydraulic pump, the working condition test bed, the fault test bed and the service life test bed and are used for acquiring the environmental data and/or the working data;
the digital twin unit comprises a one-dimensional performance simulation model, a three-dimensional simulation model, a digital twin model, a fault diagnosis model and a service life prediction model; establishing the digital twin model based on the one-dimensional performance simulation model and the three-dimensional simulation model; generating a fault diagnosis model and/or a service life prediction model based on simulation data of the digital twin model simulation analysis;
the virtual-real interaction unit comprises an interaction interface module, a data standardization module, a data analysis processing module, a digital-analog fusion module, a human-computer interaction visualization module and a data management module; the interactive interface module is used for carrying out data communication on the physical unit and the digital twin unit; the data standardization module is used for carrying out one or more of data cleaning, data conversion, data integration and data reduction on the received data; the digital-analog fusion module is used for optimizing a model in the digital twin unit after comparing the physical unit output data with the digital twin unit output data; or the digital-analog fusion module is used for outputting the environmental data and/or the working data simulated by the digital twin unit to the physical unit; the data analysis processing module is used for analyzing and processing the simulation data to obtain a diagnosis and/or prediction result; the human-computer interaction visualization module is used for displaying data in the hydraulic pump virtual-real interaction system; the data management module is used for storing data in the hydraulic pump virtual-real interaction system.
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