WO2021145513A1 - Virtual reality-based fem analysis processing apparatus and method of power device - Google Patents

Abstract

The present invention relates to a virtual reality-based finite elements method (FEM) analysis processing apparatus and method of a power device, which enable electrical and mechanical characteristics and the like of the power device connected to an FEM to be identified via a virtual reality screen (VR model) provided on the basis of 3-dimensional modeling. The present invention is configured by including: a 3D CAD model unit for 3D-modeling a specific power device to be analyzed; an FEM analysis unit for analyzing electromagnetic field, thermal, and mechanical characteristics of the modeled power device; and a VR device for implementing a result of FEM analysis of the analyzed power device as a 3D model in a virtual environment, while being connected to a web server and a computer apparatus for transmitting results of the 3D modeling and the FEM analysis to the web server.

Description

FEM analysis processing apparatus and method of electric power equipment based on virtual reality

The present invention relates to an FEM analysis processing apparatus of a power device, and in particular, a virtual reality screen (VR model) that provides electrical and mechanical characteristics of a power device connected to a finite element method (FEM) based on 3D modeling ) to a virtual reality-based FEM analysis processing device and method for power devices that can be checked through

As is known, a virtual reality (VR) system is widely used in various fields, and is particularly effectively used in the engineering field. In other words, the project 3D model can be viewed through the virtual reality system.

The 3D model is created with a CAD program, and it can be used as an input for design configuration such as mechanical engineering, electrical engineering, etc., or can visualize and deliver an idea to a certain extent before developing a new power device. Therefore, when developing a new power device, the design process is the most important part, and if this 3D model is used, the operator can understand the model for the power device by using a simulation method using the 3D CAD model, thereby saving cost and time.

Currently, the most used simulation method is to use the finite element method (FEM) to solve engineering and mathematical problems of 3D models.

However, although the current trend of using 3D models in the design of power devices is that they are not utilized by combining the FEM and 3D systems of power devices. Therefore, there is a limit to easily understanding the operating characteristics and structure of power devices. In other words, since power devices operate based on electromagnetic principles, complex numerical data and field patterns are generated due to electromagnetic field calculations, and these numerical data and field patterns cannot be easily understood.

Accordingly, it is an object of the present invention to solve the above problems, and to provide a FEM analysis processing apparatus and method of a power device based on virtual reality that enables a better understanding of the operating characteristics and structure of a power device or an electric device will be.

Another object of the present invention is to connect the FEM results of electric power devices or electric devices in a three-dimensional virtual environment to a VR environment in real time through a simulation platform and display them as a virtual reality screen, so that the numerical analysis results of the analysis target devices can be easily understood. It is to provide an FEM analysis processing apparatus and method of a power device.

The present invention for achieving the above object is a 3D CAD model unit for 3D modeling a specific power device to be analyzed; FEM analysis unit to analyze the electromagnetic field, thermal and mechanical characteristics of the modeled power device; a computer device for transmitting the 3D modeling and FEM analysis results to a web server; and a VR device that implements the analyzed FEM analysis result of the power device as a 3D model in a virtual environment in a state connected to the web server. to provide.

The 3D CAD model unit uses CATIA software that provides multi-platform software.

The FEM analysis unit uses COMSOL.

The computer device, a virtual reality platform for supporting virtual reality; VR software that allows users to design, manipulate and collaborate on projects in a virtual environment by extending the 3D functions provided by the 3D CAD model department; a Java API for transmitting the analyzed result of the FEM analysis unit to a web server through a file transfer protocol; and the OpenGL program for directly rendering the 3D CAD modeling includes a program capable of directly rendering the 3D CAD modeling.

According to another feature of the present invention, the method comprising: selecting an analysis target power device; generating a 3D CAD model for the power device by a 3D CAD model unit; analyzing, by the FEM analysis unit, the FEM simulation result of the power device using the 3D model of the power device; transmitting, by a computer device, the FEM simulation result to a web server using a predetermined communication protocol; uploading, by a web server, the FEM simulation result; connecting the web server and the VR device; and providing the FEM simulation result in three dimensions to the VR device. It provides a FEM analysis processing method of a power device based on virtual reality, characterized in that it is performed.

The simulation result analysis may include drawing voids and boundaries of the 3D CAD model; inputting main parameters of the power device; selecting a component material of the 3D CAD model; adding a physical option of the 3D CAD model; selecting a pre-entered equation for each characteristic of the power device; selecting the electrical circuit option and drawing an electrical circuit; For numerical analysis of the power device, the steps of generating a mesh structure and selecting a rotating mesh are sequentially performed, and an FEM simulator is executed to provide an analysis result.

According to the FEM analysis processing apparatus and method of the electric power device based on the virtual reality of the present invention as described above, it is possible to visually check the characteristics of the electromagnetic and the like of various electric power equipment in a 3D environment.

In addition, since the present invention displays a virtual reality screen by connecting the FEM analysis result of a power device in a three-dimensional virtual environment to the virtual environment in real time through a platform, the operator can easily understand the electrical and mechanical characteristics of the power device. .

In addition, the 3D model of the power device can be assembled and disassembled through the virtual reality screen, thereby improving the learning effect of the power device structure diagram.

1 is a block diagram of an FEM analysis processing device of a power device based on virtual reality according to a preferred embodiment of the present invention;

2 is a flowchart illustrating a process of providing an analysis result of a power device through virtual reality according to a preferred embodiment of the present invention;

3 is a flowchart illustrating a process of analyzing various FEM characteristics of a power device during the analysis process of FIG.

4 is an exemplary view showing the FEM analysis result of the power device of the present invention and the analysis result in connection with virtual reality;

Objects and effects of the present invention, and technical configurations for achieving them will become clear with reference to the embodiments described below in detail in conjunction with the accompanying drawings. In describing the present invention, if it is determined that a detailed description of a well-known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted.

In addition, the terms described below are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users and operators.

However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. Only the present embodiments are provided so that the disclosure of the present invention is complete, and to fully inform those of ordinary skill in the art to which the present invention belongs, the scope of the invention, the present invention is defined by the scope of the claims will only be Therefore, the definition should be made based on the content throughout this specification.

The present invention is to provide a virtual screen by visualizing the analysis results of various electrical and mechanical properties of electric power devices or electrical devices in real time. Hereinafter, the present invention will be described in more detail based on the embodiments shown in the drawings. do it with

1 is a block diagram of an FEM analysis processing apparatus 10 of a power device based on virtual reality according to a preferred embodiment of the present invention. As shown here, the 3D CAD model unit 100 that provides multi-platform software for designing power devices is provided. In an embodiment, the 3D CAD model unit 100 may use CATIA software suitable for a CAD program and convertible, but other software may be provided. The modeling example displayed by the 3D CAD model unit 100 in FIG. 1 is a model of one pole of the generator according to CATIA V5.

According to the present invention, the FEM analysis unit 110 for analyzing the electromagnetic field, stress, heat, etc. of the modeled power device is provided, and according to the embodiment, the FEM analysis unit 110 is FEM analysis software COMSOL (multiphysics analysis program) use The FEM analysis unit 110 is also referred to as a FEM simulator. The example modeled in FIG. 1 shows the electromagnetic field analysis model of the generator 1-pole model using the COMSOL.

The 3D CAD model unit 100 and the FEM analysis unit (ie, the FEM simulator) 110 may be configured separately from the computer device 120 to be described later or may be configured within the computer device 120 .

A computer device 120 is provided for virtual reality (VR), 3D CAD and FEM processing. The computer device 120 should be of a high-performance workstation class capable of sufficiently executing the above-described multiple functions.

The computer device 120 includes a keyboard and mouse as input devices, a monitor for displaying information, and a base station as a communication sensor device.

And although not shown in the drawing, a virtual reality platform (not shown) for supporting virtual reality is installed. In addition, VR software is installed so that users can design, manipulate, and collaborate on projects in a virtual environment by extending the 3D functions provided by the 3D CAD. A rendering database is also provided to store 3D CAD software as a modeling tool and software as a development tool program (eg C/C++, Java API, OpenGL, etc.). The Java API serves to extract and transmit the analyzed result of the FEM analysis unit to a web server through a file transfer protocol. And the OpenGL program is a program that can directly render the 3D CAD modeling.

A VR device 140 for a user to implement a virtual technology in virtual reality is provided. The VR device 140 serves to implement the FEM analysis result of the analyzed power device as a 3D model in a virtual environment while connected to the web server 130, and the VR device 140 is worn by the user on the head. It includes a headset (HMD: Head mounted display) and a controller that the user controls in virtual reality.

The web server 130 receives the FEM analysis result, uploads it, and provides it to the VR device 140 .

According to such a configuration, the analysis results of the electromagnetic fields of various power devices in the 3D environment can be visually confirmed through the mapping environment, and various principles of power devices can be easily understood.

Next, a process of providing various analysis results for electrical, mechanical, and thermal characteristics of power devices in virtual reality will be described with reference to FIGS. 2 to 4 together.

The user selects a power device to be analyzed. When the power device is selected, a 3D model of the power device is generated using the CATIA software of the 3D CAD model unit 100 (s100). The 3D model will be the same as that illustrated in the 3D CAD model unit 100 of FIG. 1 .

Then, the FEM analysis unit 110 analyzes the simulation of the power device in the 3D model of the power device generated by the 3D CAD model unit 100 (s110). Here, the simulation analysis process is a process of processing the FEM analysis of the power device, and will be for analyzing the electromagnetic field, magnetic field, thermal and mechanical properties of the power device.

The simulation analysis process of the power device will be referred to in FIG. 3 . As shown in FIG. 3 , when the FEM simulator 110 receives the 3D CAD model, it draws voids and boundaries (s200).

Then, the main parameters of the power device are input (s210). In addition, a physical option such as a component material selection of the 3D model (s220) and a rotator/magnetic option is added (s230).

In this way, when the physical option of the power device is input, equations are selected for each electromagnetic field, magnetic field, thermal, and mechanical characteristics to be analyzed (s240). Equations are input in the FEM simulator 110, and different equations are provided for each electromagnetic field, thermal, and mechanical properties.

The following Equations 1 to 4 are used for the electromagnetic field analysis. Equation 1 is Gauss's law, Equation 2 is Gauss's law for magnetism, Equation 3 is Faraday's lay, Equation 4 is Ampere-Maxwell law. Since the above-described equations are already input to the FEM analysis unit 110, when the user inputs the parameters, they are automatically calculated.

In Equations 1 to 4, E: electric field, B: magnetic field,

: charge density,

: permittivity of free space,

: Transmittance of free space, J means current density vector.

Equations 5 and 6 are used to analyze the thermal characteristics. Equation 5 is a Fourier heat law, Equation 6 is a 'Stefan-Boltzmann equation', and since Equations 5 and 6 are already input to the FEM analysis unit 110 , they are automatically calculated when a user inputs parameters.

In Equations 5 and 6, k: heat conduction heat of the material, ε: total heat emissivity of the material, σ: Stefan-Boltzmann constant, T: temperature.

Since the direction and amplitude of the force are required for mechanical stress analysis, the following Equations 7 to 11 are used. Equation 7 is torque, Equation 8 is tangential force, Equation 9 is centrifugal force, Equation 10 is gravity, and Equation 11 is a 'Lorentz' force equation required to analyze the mechanical stress of the power device.

In addition, when analyzing other characteristics of the power device, an appropriate equation may be set in the FEM analysis unit (ie, the FEM simulator) 110 .

Continuing to refer to FIG. 3 , when formula selection for each characteristic of the power device is completed as described above, an electrical circuit is drawn while selecting electrical circuit options (s250).

Next, a process of creating a mesh structure is performed so that numerical analysis can be performed on power devices having complex three-dimensional geometric shapes. That is, a mesh structure that stores data necessary for numerical analysis is required, and this mesh structure includes the coordinates of each node constituting the mesh, initial conditions and boundary conditions necessary for numerical analysis. When a mesh is created, a rotation mesh is selected (s260).

Then, when the FEM simulator 110 is executed (s270), the results of the electromagnetic field characteristics, thermal characteristics, and mechanical characteristics to be analyzed can be known (s280). An FEM simulation execution result screen is displayed on the computer device 120 as a simulation analysis result for the power device. Examples of the analysis result are 200 (electromagnetic field characteristic analysis), 300 (thermal characteristic analysis), 400 (mechanical characteristic analysis) of FIG. 4 . analysis) is the same.

As such, when the FEM analysis result of the power device is completed, the analysis result is provided by connecting the analysis result from the virtual reality environment to the VR environment in real time through the virtual reality platform, which will be described with reference to FIG. 2 above. That is, when the 3D FEM simulation analysis process (S110) of FIG. 2 is completed according to the sequence of FIG. 3 as described above and the FEM analysis result of the power device is provided, the analysis result is Java, a development tool program installed in the computer gy 120 It is transmitted to the API (s120).

Then, the FEM analysis result using the Java API is transmitted to the web server 130 and then uploaded to OpenGL (s130, s140). As is known the OpenGL is used to render 3D CAD data.

After the analysis result of the power device is uploaded, the VR device 140 is connected to the web server 130 to support virtual reality (s150). As such, when the VR device 140 is connected and the user wears the headset, the user can visually check the analysis result of the power device in the virtual reality environment (s160). An example of the analysis result is as shown in 500 of FIG. 4 .

As can be seen from the example screen '500' of FIG. 4 , when a user operates a controller in a virtual reality environment, the electric power device can be assembled and disassembled in a three-dimensional space. In addition, the simulation analysis results will be displayed on the screen so that the complex numerical data and field patterns of the power equipment can be better understood.

As such, the present invention connects the FEM analysis result of the power device and the 3D system in a VR-based environment to visualize the various analysis results of the power device on a 3D platform to implement an immersive model so that the numerical analysis result can be easily understood. .

Although described with reference to the illustrated embodiments of the present invention as described above, these are merely exemplary, and those of ordinary skill in the art to which the present invention pertains can use various functions without departing from the spirit and scope of the present invention. It will be apparent that modifications, variations, and other equivalent embodiments are possible. Therefore, the true technical protection scope of the present invention should be determined by the technical spirit of the appended claims.

It can be used in technology fields such as VR devices and AR devices that can design and process FEM analysis results of various electric power devices in virtual reality.

Claims (6)

1. 3D CAD model unit for 3D modeling a specific power device to be analyzed;

   FEM analysis unit to analyze the electromagnetic field, thermal and mechanical characteristics of the modeled power device;

   a computer device for transmitting the 3D modeling and FEM analysis results to a web server; and

   In a state connected to the web server, the FEM analysis processing apparatus of a power device based on virtual reality, characterized in that it comprises a VR device that implements the analyzed FEM analysis result of the power device as a 3D model in a virtual environment.
2. The method of claim 1,

   The 3D CAD model unit is an FEM analysis processing device of a power device based on virtual reality using CATIA software that provides multi-platform software.
3. The method of claim 1,

   The FEM analysis unit is a FEM analysis processing device of a power device based on virtual reality using COMSOL.
4. The method of claim 1,

   the computer device,

   Virtual reality platform to support virtual reality;

   VR software that allows users to design, manipulate and collaborate on projects in a virtual environment by extending the 3D functions provided by the 3D CAD model department;

   a Java API for transmitting the analyzed result of the FEM analysis unit to a web server through a file transfer protocol; and

   The OpenGL program for directly rendering 3D CAD modeling is a virtual reality-based FEM analysis processing device for power devices that includes a program capable of directly rendering the 3D CAD modeling.
5. selecting a power device to be analyzed;

   generating a 3D CAD model for the power device by a 3D CAD model unit;

   analyzing, by the FEM analysis unit, the FEM simulation result of the power device using the 3D model of the power device;

   transmitting, by a computer device, the FEM simulation result to a web server using a predetermined communication protocol;

   uploading, by a web server, the FEM simulation result;

   connecting the web server and the VR device; and

   FEM analysis processing method of a power device based on virtual reality, comprising the step of providing the FEM simulation result in three dimensions to the VR device.
6. 6. The method of claim 5,

   The simulation result analysis is,

   drawing voids and boundaries of the 3D CAD model;

   inputting main parameters of the power device;

   selecting a component material of the 3D CAD model;

   adding a physical option of the 3D CAD model;

   selecting a pre-entered equation for each characteristic of the power device;

   selecting the electrical circuit option and drawing an electrical circuit; and

   For numerical analysis of the power device, the steps of generating a mesh structure and selecting a rotating mesh are sequentially performed,

   FEM analysis processing method of electric power equipment that provides analysis results by running the FEM simulator.

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