WO2001079946A1

WO2001079946A1 - Method and tool for modeling and/or simulating a technical installation

Info

Publication number: WO2001079946A1
Application number: PCT/DE2001/001402
Authority: WO
Inventors: Thomas Peuker; Günter SÖRGEL
Original assignee: Siemens Aktiengesellschaft
Priority date: 2000-04-14
Filing date: 2001-04-10
Publication date: 2001-10-25
Also published as: DE10018704A1

Abstract

According to the inventive method for modeling and/or simulating a technical installation, the installation is firstly structured and parameterized as an installation layout so that, by using simulation calculations, process states of the installation and/or product states of the product produced by the installation can be generated subsequent to said installation layout. According to the invention, the installation is represented in a virtual reality (VR) environment. To this end, at least one interface (20; 21, 22) is provided in the corresponding tool. Said interface enables a data exchange to ensue from the simulator (1) into the application (10) of the virtual reality (VR) environment.

Description

description

Process and tool for modeling and / or simulating a technical system

The invention relates to a method for modeling and / or simulating a technical system, the system first being structured and parameterized as a system layout, so that process states of the system and / or product states of the products generated with the system can then be carried out on this system layout using simulation calculations are. Furthermore, the invention relates to a tool for generating and operating virtual production systems, in which the specified method is carried out. Such a tool is also called a tool.

Technical systems are increasingly being mapped in a virtual reality (VR). The main reasons for this are, for example, the layout planning, the design and the simulation of production processes. The virtual reality has also proven itself as a marketing tool for presentation to the customer or as part of project discussions during project planning.

The rendering of a technical system in virtual reality is complex. At least two aspects are crucial, namely:

- A system layout must first be generated. For this purpose, the individual units of the system must be combined into a complete system in the virtual world according to a defined system layout and their dimensions parameterized.

- The system thus reproduced in a virtual world must then be supplied with dynamic process data. The latter is necessary in order to simulate the production process in the virtual world, for which the data is dynamic in order to describe the system status and of products have to be handed over to the virtual world. Such data can be generated, for example, by corresponding simulation calculations.

In practice, technical systems are already shown in the virtual world, which has been extremely complex so far. In each case, a specific system is mapped and simulated in the virtual world using complex software engineering. For this purpose, 3D models are used, for example from corresponding CAD programs that are already in use in the specific project.

In the state of the art, the specified procedure must be repeated for each new project. Since the technical execution of the modeling or simulation of a technical system on the one hand and the reproduction in virtual reality on the other hand are complex, here in the prior art each has its own way. Standard methods are not known.

In contrast, the object of the invention is to provide improved methods and to create associated standard tools which, overall, lead to savings.

The object of the invention is through the measures of

Process claim 1 solved. Appropriate procedures are the subject of the dependent method claims, which also deal with a specific industry reference. The training of the associated tools is specified in the claims.

In the invention, the modeling and / or the simulation of the technical system is advantageously linked directly to the representation in virtual reality. This means that the user can now process simulation and visualization in the virtual reality are merged into a common process. An interactive procedure is also possible.

With the invention, an existing simulation tool can be expanded as a tool so that it is able to serve directly as a model generator for a corresponding VR application. A first, corresponding subinterface is defined for this. The VR application can then evaluate this interface and map the technical system in the virtual world on the basis of a library of 3d objects. The data for describing the system status and / or the product status of the products generated with the system are transmitted to the VR application via a second sub-interface and can also be visualized there. Finally, it is also possible to feed back data from virtual reality to the simulation with model generator via a third sub-interface.

Further details and advantages of the invention emerge from the following description of the figures of exemplary embodiments in conjunction with further patent claims. Show it

FIG. 1 shows a schematic illustration of the method according to the invention,

2 shows in detail the interface used here in a first embodiment and FIG. 3 shows a modification of FIG. 2 with three partial interfaces

1 shows a unit for simulating a technical system. 10 denotes a representation in virtual reality and 20 an interface between the simulator 1 and the representation of virtual reality 10. Units for simulating technical systems are known from the prior art. So-called flow scheme simulators are used specifically for the raw materials industry, for which reference is made in detail to the SIEMENS company brochure “Flow scheme simulation in the steel industry with HYBREX * (order no. E100001-T105-A13).

HYBREX is understood to mean a hybrid expert system which is shown in FIG. 1 in a self-explanatory unit 1 which forms a simulator for a technical system. In one unit HYBREX / SIM - HYBREX / PlantSIM, files from project files on the one hand and project-specific batch files on the other hand are entered. The unit HYBREX / SIM - HYBREX / PlantSIM has access to databases HYBREX / DB, HYBREX / MatDBiight - HYBREX / MatDB and to a utility analysis unit HYBREX / MCDM, whereby an optimizer HYBREX / Opt is also available. With this standard system, a technical system can be simulated in software, whereby the simulated system can be set using a switch, so that the system simulation can then no longer be changed easily.

With the simulator 1 working according to the HYBREX method, a system layout is created in a known manner. With the flow diagram simulator 1, the system is initially structured and parameterized individually. After verification of the system layout created by software, process and product states are then generated on the system using simulation calculations.

This existing tool is now being incorporated into the definition of the virtual world. The modeling of the virtual world is based on a library of parameterizable 3d objects that reflect the status of virtual reality (VR) on one or more projection surfaces. This advantageously achieves the following:

It is no longer necessary to program a virtual world for every new system, which means a considerable cost reduction results. The modeling of the virtual world is carried out by Tool 1, which is already available for the simulation. This enables the engineering service to be automated so that it can be performed by any user. VR specialists are no longer necessary. The fact that the user merges the process simulation and the visualization in the virtual world results in a single unit. Changes in the process simulation model are immediately transferred to the visualization in the virtual world.

In Figure 2, the units 1, 10 and 20 are present according to Figure 1. The interface 20 has in detail a first interface 21 for static, i.e. one-time transfer of the system layout. Furthermore is a second

Interface 22 for describing the system and product status is available, which is dynamic.

The following parameters are transferred from unit 1 for model generation and simulation: according to arrow 2, a list of the units, according to arrow 3 the coordinates of the units and according to arrow 4 the parameters of the units are transferred to the first interface 21. The sub-processes of the system are defined under units, each of which realizes basic technical operations. With such units, a technical system can be mapped as a sequence of states and processes. According to arrow 6, the results per unit and according to arrow 7 the state of the product after each unit are transferred to the second interface 22. The data then arrive from both interfaces 21 and 22 according to arrows 27 and 28 to unit 10 of the VR application.

For interactive 3d visualization, data transfers from the VR application 10 to the simulator 1 are also desired in many cases, which is illustrated by FIG. 3. In an arrangement according to FIG. 2, the interface 20 comprises

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Claims

claims

1. A method for modeling and / or simulating a technical system, the system initially being structured and parameterized as a system layout, so that process states of the system and / or product states of the products generated with the system are subsequently generated on this system layout by means of simulation calculations. characterized in that the system is mapped in a virtual reality (VR).

2. The method as claimed in claim 1, so that the modeling of virtual reality (VR) is carried out on the basis of a library of parameterizable 3d objects.

3. The method according to claim 1 or claim 2, so that the process simulation and the visualization in the virtual reality (VR) are merged into one common process by the user.

4. The method as claimed in claim 3, so that changes in the process simulation model are transmitted directly as visualization in virtual reality (VR).

5. The method according to any one of the preceding claims, g e k e n n z e i c h n e t by application in the raw materials industry.

6. The method according to claim 5, g e k e n n z e i c h n e t by the application in rolling mills.

7. The method according to claim 6, characterized in that in a rolling mill the application of individual roll stands and of rolling material thus rolled the virtual reality (VR) is transmitted and visualized there.

8. The method according to claim 7, so that process variables are visualized that process variables are visualized

9. The method according to claim 7 and claim 8, so that in a rolling mill with individual roll stands at least the rolling force occurring on the roll stand and the associated spring deflection of the roll stand are visualized.

10. The method according to claim 7, d a d u r c h g e k e n n z e i c h n e t that state variables are visualized

11. The method according to claim 7 and claim 10, so that the rolling stock, preferably its thickness and flatness, and the temperature of the rolling stock are visualized in a rolling mill.

12. The method according to claim 11, d a d u r c h g e k e n n z e i c h n e t that the temperature of the rolling stock is shown using a color scale.

13. Tool for generating and operating a virtual production system using the method according to claim 1 or one of claims 2 to 12, with a simulator (1) and at least one interface (20; 21-23) with which a data exchange from the simulator ( 1) in a unit (10) for the application of virtual reality (VR).

14. Tool according to claim 13, characterized in that the simulator (1) simulates the system by means of a flow diagram and creates the system layout.

15. Tool according to claim 14, so that the simulator (1) supplies the specification of location coordinates (x, y, z) of individual system units.

16. Tool according to claim 13, characterized in that the unit (10) for the application of virtual reality (VR) evaluates the interface (20; 21-23) and on the basis of a library of 3d objects the respective system in the maps the virtual world.

17. Tool according to claim 13, so that the interface (20; 21 - 23) is mapped to the VR application (10) at least for the transmission of data for describing the process on the one hand and the system and / or product status on the other hand.

18. Tool according to claim 17, so that the interface (20) contains a first partial interface (21) for the description of the system and a second partial interface (21) for the description of the system and / or the product status.

19. Tool according to claim 13, so that a bidirectional data exchange takes place via the interface (20; 21-23).

20. Tool according to claim 19, so that the interface (20) contains a third sub-interface (23) for the reverse transmission (15) of data.