CN111413060B - Test bed system based on digital twins - Google Patents
Test bed system based on digital twins Download PDFInfo
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- CN111413060B CN111413060B CN202010243967.8A CN202010243967A CN111413060B CN 111413060 B CN111413060 B CN 111413060B CN 202010243967 A CN202010243967 A CN 202010243967A CN 111413060 B CN111413060 B CN 111413060B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
- G01M7/06—Multidirectional test stands
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The invention provides a test bed system based on digital twins, which comprises: the system comprises a physical test bed system, a virtual test bed system and an integrated service system; the physical test bed system and the virtual test bed system are mutually mapped; the physical test bed system sends a first data stream to the integrated service system, and the integrated service system sends a first information stream corresponding to the first data stream to the physical test bed system; and the virtual test bed system sends a second data stream to the integrated service system, and the integrated service system sends a second information stream corresponding to the second data stream to the virtual test bed system. By applying the embodiment of the invention, not only can the dynamic process of blade collision vibration be efficiently and fully researched, but also the influence rule of multiple nonlinear factors on the blade and rotor coupling system can be deduced through a digital twinning technology.
Description
Technical Field
The invention relates to the technical field of blade vibration improvement tests, in particular to a test bed system based on digital twinning.
Background
Modern turbine blades are often operated in a supercritical (super-) high-flexibility state, and it is statistical that about 70% of turbine accidents are caused by blade accidents. Due to the nonlinearity and complexity of factors such as oil film force, gap airflow force, sealing exciting force and the like which influence the vibration coupling effect of the blade and the rotor, the overall research and system analysis of theoretical analysis, numerical calculation and experimental research on the dynamic characteristic of the blade and rotor coupling system are less at present.
The digital twin is to establish a twin body of a physical object in an information space in a digital mode, simulate the behavior of the physical object in a real environment through information interaction, and achieve real simulation, real-time monitoring, fault diagnosis and behavior prediction on the behavior and state of the physical entity.
In the related technology, if the digital twin is combined with a rotor vibration test bed, not only can the impact vibration process of the blade be fully researched, but also the influence rule of each nonlinear factor on the coupling system of the blade and the rotor can be deduced, so that reference is provided for the design of the blade in the engineering, the life cycle of the blade is prolonged, and the safety effect of the blade in a high-speed running state is enhanced. Therefore, the technical means have important significance for academics and enterprises.
Disclosure of Invention
In view of the above disadvantages of the prior art, the present invention provides a test bed system based on digital twinning, which is capable of not only efficiently and fully researching the dynamic process of blade collision vibration, but also deriving the influence rule of multiple nonlinear factors on the blade and rotor coupling system through the digital twinning technology. .
To achieve the above and other related objects, the present invention provides a digital twinning based test stand system, comprising: the system comprises a physical test bed system, a virtual test bed system and an integrated service system;
the physical test bed system and the virtual test bed system are mutually mapped;
the physical test bed system sends a first data stream to the integrated service system, and the integrated service system sends a first information stream corresponding to the first data stream to the physical test bed system;
and the virtual test bed system sends a second data stream to the integrated service system, and the integrated service system sends a second information stream corresponding to the second data stream to the virtual test bed system.
In an implementation mode, the physical test bed system comprises a test bed frame, a vibration exciter, a rotor, blades, a driving motor, an actuator, an oil pump, a mechanical arm, a sliding bearing, a high-performance sensor, an industrial camera and a warning lamp, and has a real-time sensing function and an access fusion function of multi-source and heterogeneous data besides a measurement function of a rotor vibration test bed.
In one implementation, the virtual test bed system is a set of the physical test bed system mapped in an information space, and includes three modules, namely a body module, a data module and a knowledge module.
In one implementation, the body module is a storage module of a digital model of the whole physical test bed system, and the digital model corresponds to all entities involved in the physical test bed system one by one;
the data module is a storage module of multi-source and heterogeneous data acquired in real time during the operation of the whole physical test bed system;
the knowledge module comprises physical characteristic description information of each body component of the test bed, including the size and the material of the test body, and environmental factors of the operation of the test bed system including temperature and humidity.
In one implementation, the integrated service system is a collection of various service systems of the rotor vibration test bed, and the collection comprises a function module and a data module;
the function module comprises five sub-modules, namely a process monitoring module, an online simulation module, an auxiliary decision module, a capability evaluation module and a fault early warning module;
and the process monitoring module monitors the dynamic running process of the test bed in real time through the industrial camera.
The online simulation module is used for performing online simulation analysis on the test bed, and the online simulation analysis comprises modal analysis, harmonic response analysis, random vibration analysis finite element analysis and sensitivity analysis mathematical analysis;
the assistant decision module is used for optimizing the simulation data;
the capability evaluation module is used for evaluating the task execution capability of the test bed system, and comprises the execution capability evaluation of a motor, an oil pump and mechanical arm equipment;
the fault early warning module is used for early warning unknown faults of the test bed system, warning the warning lamp in an early warning state, emergently closing the test bed in an overload state and storing fault results in the data module in an analysis report form.
In one implementation mode, the data module has the function of processing massive, multi-source and heterogeneous data transmitted by a high-performance sensor of a physical test bed system at a high speed, comprises the functions of data storage, management, analysis, mining and driving, and can be used for data management by a cloud storage technology.
As described above, the embodiment provided by the embodiment of the invention not only can efficiently and fully research the dynamic process of blade collision vibration, but also can deduce the influence rule of multiple nonlinear factors on the blade and rotor coupling system through the digital twin technology.
Through the closed-loop connection of the physical test bed system, the virtual test bed system and the integrated service system, an optimization scheme is provided for the adjustment of blade clearance and the oil pressure of blade operation while the system research of theoretical derivation, simulation analysis and test verification, the optimization scheme is provided for the design of the blade, the life cycle of the blade is prolonged, the safety effect of the blade in a high-speed operation state is enhanced, and the method has important theoretical significance and practical application requirements.
Drawings
FIG. 1 is a schematic diagram of a first embodiment of a digital twin-based test bed system according to an embodiment of the present invention.
FIG. 2 is a schematic diagram of a second embodiment of a digital twin-based test bed system according to an embodiment of the present invention.
FIG. 3 is a schematic diagram of a third embodiment of a digital twin-based test bed system according to an embodiment of the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Please refer to fig. 1-3. It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated.
The first embodiment is as follows:
as shown in fig. 1, the test bed system based on digital twins is composed of three subsystems, which are respectively: the system comprises a physical test bed subsystem, a virtual test bed subsystem and an integrated service subsystem, wherein the physical test bed subsystem and the virtual test bed subsystem are mapped with each other; the physical test bed system sends a first data stream to the integrated service system, and the integrated service system sends a first information stream corresponding to the first data stream to the physical test bed system; the virtual test bed system sends a second data stream to the integrated service system, and the integrated service system sends a second information stream corresponding to the second data stream to the virtual test bed system. The three subsystems form a closed-loop connection with the data stream through the information stream.
The collected data includes useful information and redundant data, and the data collection and data driving are represented by an information stream and a data stream.
Therefore, the first data stream is physical raw data (including device bottom layer data and data collected by a sensor), and the first information stream is decision information; the second information flow is twin information (information of real-time data mining, information corresponding to historical data and optimized data)
The second data stream is virtual run data (initially the same as the physical original data, but as will be changed in the iterations described below).
Referring to fig. 2, the physical test bed system of the present invention refers to all entities involved in a rotor vibration test, including a test bed, a vibration exciter, a rotor, a blade, a driving motor, an actuator, an oil pump, a mechanical arm, a sliding bearing, a high performance sensor, an industrial camera, a warning light, etc. Besides the measurement function of the rotor vibration test bed, the real-time sensing function and the access fusion function of multi-source heterogeneous data are achieved.
The virtual test bed system is a set of mappings in the information space of the whole physical test bed system. The set comprises a body module, a data module and a knowledge module.
The body module is a storage module of a digital model of the whole physical test bed system, and the digital model corresponds to all entities involved in the physical test bed system one by one;
the data module is a storage module of multi-source and heterogeneous data acquired in real time during the operation of the whole physical test bed system;
the knowledge module comprises physical characteristic description information of each body component of the test bed, including the size, the material and the like of the test body, and environmental factors of the operation of the test bed system include temperature, humidity and the like.
The integrated service system is mainly responsible for providing technical support and technical service for the digital twin of the rotor vibration test platform and is a collection of various service systems of the rotor vibration test platform. The collection comprises a function module and a data module.
The function module comprises five submodules, namely a process monitoring module, an online simulation module, an auxiliary decision module, a capability evaluation module and a fault early warning module.
And the process monitoring module is used for monitoring the dynamic running process of the test bed in real time through the industrial camera.
And the online simulation module is used for performing online simulation analysis on the test bed, including finite element analysis such as modal analysis, harmonic response analysis and random vibration analysis, and mathematical analysis such as sensitivity analysis.
The auxiliary decision module is used for optimizing the simulation data;
and the capability evaluation module is used for evaluating the task execution capability of the test bed system, and comprises the execution capability evaluation of equipment such as a motor, an oil pump and a mechanical arm.
And the fault early warning module is used for early warning unknown faults of the test bed system, warning the warning lamp in an early warning state, emergently closing the test bed in an overload state and storing fault results in the data module in an analysis report form.
The data module has the functions of processing massive, multi-source and heterogeneous data transmitted by a high-performance sensor of the physical test bed system at a high speed, comprises the storage, management, analysis, mining and driving of the data, and can be used for data management by a cloud storage technology.
Example two:
blade vibration test method based on digital twinning
According to the system, a blade vibration test method based on digital twinning is provided, the influence of the non-uniform shroud clearance of the shrouded blade on a blade rotor coupling system under different boundary conditions is researched, and the method comprises the following steps:
as shown in fig. 3, setting initial conditions to drive a physical test bed system (field control or remote control through a virtual test bed);
the real-time dynamic running process of the physical test bed system can be checked in a real-time monitoring module of the integrated system;
the virtual test bed system and the physical test bed system achieve bidirectional mapping through real-time data and information of high-performance sensors such as an eddy current sensor, a photoelectric rotating speed sensor, an acceleration sensor and the like;
the integrated service system has an initial constraint condition value of xi(i is 1, … …, m, m is the number of independent variables) and storing the data, and testing the physical testCollecting operation data of a testing system, and performing harmonic response analysis and random vibration analysis by using an online simulation module; the initial conditions are independent variable condition values required by the content to be researched, the initial rotating speed corresponding to the motor, the magnitude of exciting force, the magnitude of oil pressure of the oil injection pump, the magnitude of blade shroud clearance between the blades, the roughness of the blades and the like.
The simulation result and the historical data are analyzed by an assistant decision module to obtain the value of xi-yj,xi+yj](y1，……，ymThe numerical value is self-defined, the smaller the numerical value is, the more the iteration times are), and the influence of different oil film forces, different exciting forces, different blade shroud gaps and different roughness conditions on the blade rotor coupling system in a closed interval is obtained, so that the optimized optimal oil film force, blade shroud gap and roughness are obtained; and data storage is carried out through a data module; the oiling effect of an oiling pump of the information-driven physical test bed system on the sliding bearing is achieved, the thickness of a gasket between blade roots is increased by a mechanical arm of the information-driven physical test bed system, the mechanical arm of the information-driven physical test bed system is replaced by a blade crown-shaped metal sleeve under the condition of different roughness, and repeated iteration is carried out to obtain an optimal solution; analyzing the stored optimized numerical values in a data module, and summarizing the influence rule of different oil film forces on the blade rotor coupling system;
the capability evaluation module of the integrated system is used for judging the driving control capability of the integrated service system on the physical test bed system, and whether the information generated by the auxiliary decision module of the integrated service system has actual controllability or not can also be judged.
The occurrence of machine faults and safety accidents is prevented through the fault early warning module of the integrated system.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (4)
1. A digital twinning based test stand system, comprising: the system comprises a physical test bed system, a virtual test bed system and an integrated service system;
the physical test bed system and the virtual test bed system are mutually mapped;
the physical test bed system sends a first data stream to the integrated service system, and the integrated service system sends a first information stream corresponding to the first data stream to the physical test bed system;
the virtual test bed system sends a second data stream to the integrated service system, and the integrated service system sends a second information stream corresponding to the second data stream to the virtual test bed system;
the first data flow is physical original data, bottom layer data of the physical test bed system and data collected by a sensor, and the first information flow is decision information;
the second information flow is twin information and comprises information of real-time data mining, historical data and information corresponding to optimized data;
the second data stream is virtual operating data;
the physical test bed system comprises a test bed frame, a vibration exciter, a rotor, blades, a driving motor, an actuator, an oil pump, a mechanical arm, a sliding bearing, a high-performance sensor, an industrial camera and a warning lamp, and has a real-time sensing function and an access fusion function of multi-source and heterogeneous data besides the measurement function of the rotor vibration test bed;
the integrated service system is a set of various service systems of the rotor vibration test bed, and the set comprises a function module and a data module;
the function module comprises five sub-modules, namely a process monitoring module, an online simulation module, an auxiliary decision module, a capability evaluation module and a fault early warning module;
the process monitoring module monitors the dynamic running process of the test bed in real time through an industrial camera;
the online simulation module is used for performing online simulation analysis on the test bed, and the online simulation analysis comprises modal analysis, harmonic response analysis, random vibration analysis finite element analysis and sensitivity analysis mathematical analysis;
the assistant decision module is used for optimizing the simulation data;
the capability evaluation module is used for evaluating the task execution capability of the test bed system, and comprises the execution capability evaluation of a motor, an oil pump and mechanical arm equipment;
the fault early warning module is used for early warning unknown faults of the test bed system, warning the warning lamp in an early warning state, emergently closing the test bed in an overload state and storing fault results in the data module in an analysis report form.
2. The digital twin based test bed system as claimed in claim 1, wherein the virtual test bed system is a set of mapping of the physical test bed system in information space, comprising three modules of an ontology module, a data module and a knowledge module.
3. The digital twin-based test bed system according to claim 2, wherein the body module is a storage module of a digital model of the whole physical test bed system, and the digital model corresponds to all entities involved in the physical test bed system one by one;
the data module is a storage module of multi-source and heterogeneous data acquired in real time during the operation of the whole physical test bed system;
the knowledge module comprises physical characteristic description information of each body component of the test bed, including the size and the material of the test body, and environmental factors of the operation of the test bed system including temperature and humidity.
4. The digital twin-based test bed system as claimed in claim 2, wherein the data module has a function of processing massive, multi-source and heterogeneous data transmitted by a high-performance sensor of the physical test bed system at a high speed, and comprises storage, management, analysis, mining and driving of the data, and the data module can be used for data management by cloud storage technology.
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| CN113588277B (en) * | 2021-08-10 | 2022-05-17 | 东北大学 | Vibration measuring device for multi-size outline rotor of engine and digital twinning method thereof |
| CN113642242A (en) * | 2021-08-17 | 2021-11-12 | 上海电气集团智能交通科技有限公司 | Intelligent bus traffic simulation platform based on digital twins |
| CN114441126B (en) * | 2022-02-10 | 2024-08-20 | 上海电气集团股份有限公司 | Vibration test method, system, equipment and medium based on digital twin |
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