WO2006122689A1 - Dispositif de conception electronique - Google Patents

Dispositif de conception electronique Download PDF

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Publication number
WO2006122689A1
WO2006122689A1 PCT/EP2006/004378 EP2006004378W WO2006122689A1 WO 2006122689 A1 WO2006122689 A1 WO 2006122689A1 EP 2006004378 W EP2006004378 W EP 2006004378W WO 2006122689 A1 WO2006122689 A1 WO 2006122689A1
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WO
WIPO (PCT)
Prior art keywords
attribute
geometric object
design
construction device
design model
Prior art date
Application number
PCT/EP2006/004378
Other languages
German (de)
English (en)
Inventor
Hauke Arndt
Eberhard Benz
Rainer Bernhard
Dietmar Frank
Bertram Hans
Werner Hipp
Thomas Krumenaker
Dirk Leypoldt
Achille Mbang Sama
Jonathan Mohring
Dietrich Nowottny
Hans-Peter Rehner
Alexander Rolinger
Original Assignee
Daimlerchrysler Ag
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Daimlerchrysler Ag filed Critical Daimlerchrysler Ag
Publication of WO2006122689A1 publication Critical patent/WO2006122689A1/fr

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/10—Geometric CAD
    • G06F30/17—Mechanical parametric or variational design
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F30/00—Computer-aided design [CAD]
    • G06F30/10—Geometric CAD
    • G06F30/13—Architectural design, e.g. computer-aided architectural design [CAAD] related to design of buildings, bridges, landscapes, production plants or roads

Definitions

  • the invention relates to an electronic device for constructing a technical system comprising at least two components.
  • What is desired is a design device that simplifies engineering of a technical system, especially when the system to be constructed is similar to an already constructed system and the similarities are to be exploited to save time and reduce the risk of errors.
  • This design device has an electronic library with various types of design elements.
  • the construction device has means for selecting a type and generating a
  • Design element of a previously selected type By using an automatically evaluable calculation rule From EP 0869450 A2 a system and a method are known to design a technical system with components.
  • the technical system is a cooling system with components and lines between these components.
  • rules are laid down for the design of cables, and after the requirements and constraints have been entered, components are selected and positioned free of interference, and the cables are laid between the positioned components.
  • EP 1251444 A1 describes a method for configuring a product by means of a PC. An electronic library with descriptions of components is given. You select a system concept for the product. Subsequently, possible components of this system concept are offered for selection. The user selects from the offered components which.
  • WO 2005/001721 A1 discloses a method and a software tool for acquiring, storing and displaying "design knowledge information.” This information about constructing is obtained in a first project, which includes causal dependencies to reuse in a second project.
  • US 2003/0144758 A1 discloses an apparatus and a method for determining in a design model the geometry of a product, computer-evaluable dependencies ("knowledge"),
  • Integrate evaluation rules The geometry and dependencies are changed and the resulting changes are determined by "propagating" the changes. From WO 02/25502 Al it is known to parameterize design models. A parameterized basic model acts as a starting point for design models of further variants. A user changes a geometry model via so-called interpolation points and changes parameters.
  • EP 0558006 B1 describes a CAD system and a CAD method for common design. Several designers are designing design models of different components in parallel. Messages about changes to a design model are sent to other design models.
  • EP 1320003 A2 describes a device with which an engineer designs a product with functional components.
  • the device comprises a memory unit for example geometries of the functional blocks as well as a component for searching geometries.
  • the device makes it possible to reuse existing design models when constructing a new component.
  • example already existing design models are determined and considered for designing a coarse material appearance.
  • DE 10254317 A1 discloses a construction method and a CAD system.
  • a replacement design element is specified. This describes the object simplified, it is associated with information about the geometry of the object to be constructed. Another item is constructed depending on the replacement design element and the associated information.
  • the invention has for its object to provide a construction device with the features of the preamble of claim 1, which reduces the number of required user inputs and engagement points in the design.
  • the construction device includes an electronic library.
  • Each library stores an initial design model of each component in this library.
  • a design model of an article describes in a computer-available manner the geometry of this article, in particular the geometry of its surface.
  • Each initial design model includes at least one geometric object having at least one attribute.
  • the definition is stored that a first attribute of a geometric object is changeable by a user. Furthermore, it is stored that a second attribute of a geometric object can be automatically calculated.
  • the library also stores an automatically evaluable dependency rule that determines how the second attribute depends on the first attribute.
  • the design device is configured to generate a respective design model of each component. It is designed so that when creating a constituent design model, the parent design model of that constituent is copied. The copying is performed so that the generated constituent design model makes a copy includes each geometric object comprised by the initial construction model of the component, together with the copies of the attributes of each of these geometric objects.
  • the construction device includes means for altering the copy of each user-changeable attribute. It is also designed to modify the copy of the second attribute by applying the at least one dependency rule at least once after a change of the copy of the first attribute by means of the change means. The design device locks the copy of the second attribute against changes by the user.
  • the design device eliminates the need for a designer to begin designing "from scratch.” Rather, the library provides a user with initial design models of just those constituents that make up the engineering system to be constructed.The copying design models of these components are constructed this way These attributes act as defined intervention points for adapting the design models
  • a design model of the technical system is created by copying the original design models along with their geometric objects and attributes and modifying a user's copied attributes it is necessary for the user to create new design models, saving time and reducing the risk of errors.
  • the user In order to reduce the required user input, it is determined and stored which attributes the user can and can not change. At least one of the attributes is changeable by the user, at least one not. This further reduces the number of defined engagement points. Also, the non-user-changeable attribute can also be modified, namely by automatically applying a dependency rule. Thereby the engineering process is further automated, and the risk of errors is reduced.
  • FIG. 1 an exemplary architecture of the construction system according to the invention
  • Fig. 2. the component "distribution box housing" and its geometric objects and their attributes;
  • the embodiment relates to the construction of variants of a subsystem of a passenger car.
  • the technical system in this example is therefore a subsystem of a passenger car.
  • Various variants of the subsystem are used in different model series of the passenger car. These variants differ from each other by attributes.
  • the design device of the present invention provides a variant designer with an electronic library of initial design models for the components of that subsystem and allows it to construct a design model of a variant using this library.
  • Fig. 1 shows an exemplary architecture of the construction system according to the invention.
  • the arrows in Fig. 1 denote data flows.
  • the construction system using a first and a second Data processing system realized.
  • the first data processing system DVA-I is used to construct and provide initial design models of the components of the engineering system to be constructed.
  • the second data processing system DVA-2 is used to construct a design model of a variant of the passenger car subsystem with the aid of these initial design models.
  • the first data processing system DVA-I in this example comprises the following components: a computing unit 1.1 for performing calculations, a screen device 2.1 with a cathode ray screen or liquid crystal screen, a first input device in the form of a DV mouse 4.1 having three keys, a second input device in the form of a keyboard 5.1 with buttons and a graphics card 6.1, which generates the input signals for the display device 2.1.
  • the first data processing system DVA-I has read and write access to a data memory via an information forwarding interface, in which the electronic library 3.1 is stored with the initial design models of the components.
  • the electronic library 3.1 is stored with the initial design models of the components.
  • two initial construction models 10.1 and 11.1 are indicated.
  • a crude output design model 20.1 of the subsystem is stored in the electronic library 3.1. This rough design model does not describe the details of the components.
  • the second data processing system DVA-2 comprises in this example the following components: a computing unit 1.2 for performing calculations, a display device 2.2 with a cathode ray screen or liquid crystal screen, a first input device in the form of a DV mouse 4.2, which has three buttons, a second input device in the form of a keyboard 5.2 with buttons and a graphics card 6.2 which controls the input signals for the Screen device 2.2 generated.
  • the second data processing system DVA-2 has read access to the data memory with the electronic library 3.1 via an information forwarding interface. Furthermore, the second data processing system DVA-2 has an information forwarding interface read and write access to a data memory 3.2, in which the design models of the components of the variant and a rough design model of the variant are stored. These design models in the data memory 3.2 were created by copying and are user-changeable. By way of example, two component design models 10.2 and 11.2 and the variant design model 20.2 are indicated.
  • a DV mouse can be used as the first input device z. B. also be provided a "space mouse”.
  • the subsystem is z.
  • a rough initial design model 20.1 is stored for the climate box as a whole.
  • This initial design model 20.1 has a plurality of geometric objects that determine the positioning of the air conditioning box relative to other subsystems of the car. This relative positioning is accomplished by positioning and orienting the climate box and the other subsystems in a given three-dimensional coordinate system having an x-axis, a y-axis, and a z-axis. Therefore, the initial design model 20.1 has the following geometric objects: a reference point, an area restricting the climate box in the yz plane, an area bounding the climate box in the xy plane, an area bounding the climate box in the xz plane.
  • the reference point has as its attribute its x, y and z coordinates in the coordinate system.
  • the surface in the y-z plane is perpendicular to the x-axis and has as an attribute the x-coordinate, ie the intersection of the surface with the x-axis.
  • the surface in the x-y plane is perpendicular to the z-axis and has the z-coordinate as an attribute.
  • the surface in the x-z plane is perpendicular to the y-axis and has the y-coordinate as an attribute. All these attributes can be changed by the user.
  • the subsystem "climate box” consists inter alia of the following components: the junction box housing, the evaporator, the heat exchanger, the center nozzle, the footwell transverse nozzle, the footwell fundus nozzle.
  • the component “distribution box housing” has, inter alia, the following components, which are illustrated by FIG. 2 and modeled by geometric objects: an end face Sl, a side face SF composed of several partial surfaces, a further end face S2, which is concealed in the illustration of FIG. 2 from the end face Sl and the side surface SF, a pocket Tl in the end face Sl, which has the shape of an approximately rectangular recess, another pocket T2 in the end face S2, which has the same shape as T1 and is hidden in Fig. 2.
  • the pockets T1 and T2 serve to allow a robot to grip the housing during manufacture of the air conditioning box.
  • the end face Sl has the following attributes: the total width b in [mm], the part widths bl and b2 in [mm], the total height h in [mm], the part heights hl and h2 in [mm ] the angle ⁇ in [degrees], the wall thickness w of the face in [mm].
  • the three attributes b, h and ⁇ are numerical parameters that are freely changeable by a user.
  • the other attributes can not be changed by the user and are calculated automatically.
  • the library 3.1 also stores default values for the four attributes b, h, w and ⁇ , and the user can override these default values.
  • the attributes of the further end face S2 are not changeable by the user.
  • arithmetic rules are stored, which determine how the parameters of S2 depend on the parameters of Sl.
  • Design model 10.1 which describes the junction box housing.
  • an output design model 10.2 for the component central nozzle and for the other components of the subsystem air conditioning box is stored in the electronic library 3.1.
  • the center nozzle as a whole is modeled by a single geometric object.
  • the attributes of the center nozzle are assigned to this one geometric object.
  • the attributes of this geometric object are illustrated in FIG. 3. On the left, the central nozzle is shown in perspective, on the right, a plan view of the end face is shown.
  • the position of the center nozzle in the xy plane is determined by the position of the junction box housing. This is by appropriate
  • the attributes of the center nozzle include the following variable ones: the depth s of the center nozzle, the height h of the center nozzle, the width b of the center nozzle, the position of the front face on the z axis, the inner radii rl and r4, the inclination angle ⁇ of the center nozzle against the horizontal, the wall thickness of the central nozzle.
  • This initial design model 20.1 includes the above-mentioned definitions for the reference point and the three bounding planes.
  • the subsystem initial design model as well as the initial design models of the components include geometric objects. These geometric objects are general
  • Body z. B. pockets, holes, holes, flat surfaces, curved surfaces,
  • An example of a geometric object is a curve in space, the z. B. determines the geometry of a side wall or a lateral surface of a geometric object.
  • Dimensions of a geometric object such as length, breadth, height or inner radius
  • Angles describing the shape of the geometric object e.g. B. bevel angles, Position and orientation of the geometric object in a given three-dimensional coordinate system and / or the coordinates of support points, the course of a geometric object in the form of a curved line, for.
  • a track train or a spline set As a track train or a spline set.
  • Such a dependency rule determines how an attribute depends on one or more other attributes.
  • the dependency rules define a reference network of dependencies between the attributes of the geometric objects of the technical system and its constituents.
  • attributes act as reference providers and as reference users.
  • Reference sensors influence other attributes.
  • Reference takers are influenced by other attributes.
  • Att f (Att-1, ..., Att-n)
  • Att is a reference taker
  • Att-1, ..., Att-n are n reference sources.
  • User-modifiable attributes are always reference sources.
  • a non-user-changeable attribute is - if its value is ever changeable - Reference recipient. But it can also be a reference source.
  • a non-user-changeable attribute always occurs on the left side. It is possible that in a dependency rule on the right side of the user changeable and / or automatically calculable attributes occur.
  • the reference network under the attributes defines a reference network among the components of the technical system. If a reference generator Att-1 of a component A acts on a reference receiver Att-2 of a component B, then A is reference generator for B.
  • a generic bill of material for the technical system is generated.
  • This BOM specifies which components each variant of the technical system consists of and which components comprise these components. This BOM is therefore valid for every variant.
  • individual components may be marked as optional.
  • An optional ingredient does not necessarily occur in every variant of the technical system.
  • the other ingredients are mandatory ingredients.
  • a reference network among the components is defined, e.g. B. in the form of a table. Each column specifies for which other constituents a constituent is a reference source. Each line determines for which other constituents a constituent is a reference taker.
  • an initial design model is created. This will be the first Data processing system DVA-I on which a software tool for computer-aided design, for. B. a CAD tool installed. Components of the components are modeled as geometric objects, e.g. B. as design elements ("features").
  • Attributes of these components and geometric objects are defined.
  • value ranges and default values are set for attributes that are numeric parameters.
  • a reference network is set up under the attributes. This reference network determines which attribute is the reference source for which other attributes.
  • Att-1 is both the reference and reference for Att-2.
  • Dependency rules between the attributes are established. These dependency rules are automatically evaluable and compatible with the reference network among the attributes.
  • this electronic library 3.1 is used to any other variant of the technical system, ie, for. B. any new variant of the climate box to construct.
  • a variant designer is the user of the second data processing system DVA-2.
  • This second data processing system DVA-2 is also a CAD tool Installed.
  • a design model for a new variant is preferably generated by the following steps:
  • a copy 20.1 of the rough initial engineering model 20.1 for the technical system is generated.
  • the copies are stored in the data memory 3.2.
  • a user uses input devices 4.2 and 5.2 to actually manipulate changeable attributes. If it does not change a changeable attribute, its default value is used.
  • the unchangeable attributes are locked against changes by the editor.
  • the dependency rules are used to automatically calculate additional attributes from the changeable attributes. By applying the dependency rules again, further attributes are derived from already calculated attributes.
  • the user can visualize the thus created design model of the variant. If required, it modifies other attributes and adapts its geometry if necessary.
  • One embodiment provides to copy the dependency rules when copying the output design models and store them in the data memory 3.2.
  • This Traps can be the output design models in the library 3.1 and the generated design models for the variant in the data memory 3.2 independently change.
  • An alternative embodiment provides that if an initial design model, including its geometric objects and attributes, each copy of a geometric object and each copy of an attribute receives a reference to the respective original in the library 3.1.
  • the dependency rules need not be copied with. Instead, to apply dependency rules, the references from the attribute copies to the originals and dependency rules in library 3.1 are applied.
  • the user changes the position and / or orientation of components or geometric objects. Or he adjusts the geometry of geometric objects. It can also complement geometric objects or attributes specific to the variant.
  • Some attributes that can be changed by the user are preferably changed graphically by the user using the CAD tool on DVA-2. This CAD tool visualizes the
  • Construction models including their geometrical objects on the screen 2.2 Using a tree-like BOM, the CAD tool indicates which geometric objects and attributes have a design model to be processed. If a user selects a node of this BOM, the CAD tool in the design model visualizes the geometric object for which the selected node is located.
  • an attribute specifies the position or orientation of a geometric object
  • the user alters the attribute by shifting or rotating the representation of the geometric object. Or it changes the course of a geometric object in the form of a curved line, z. B. a train or a train Splines, graphic.
  • the user changes the coordinates of the vertices of this line, that is, attributes of the geometric object.
  • the user modifies the variable attributes, which are numerical parameters, using a table representing the CAD tool.
  • This table comprises one line per variable attribute.
  • a name of the respective component is shown, in the second column a name of the respective geometric object and in the third column a name of the respective attribute.
  • the fourth column displays the currently used value of the attribute. The user can override this value by typing with the keyboard.
  • the respective unit of measurement of the attribute z. B. [mm] specified.
  • a numerical parameter is displayed both in the table and is changeable via the table as well as graphically changeable with the CAD tool. For example, positions and orientations of graphical objects or curves of curved curves can be changed both textually and graphically.
  • the means of the design device for changing the variable attributes therefore include the input devices 4.2 and 5.2 of the second data processing system DVA-2, the interaction means of the CAD tool on the second data processing system DVA-2 and the table just described.
  • the design device After the user changes attributes, the design device applies dependency rules to recalculate attributes that are reference takers. Such a newly calculated attribute can itself be a reference generator. In this case dependency rules are applied again. Preferably, those dependency rules are used, respectively on the right side have at least one attribute that has been changed by the user or previously recalculated.
  • a preferred embodiment provides that the dependency rules are applied at the request of the user. If the user has changed an attribute after the last application of dependency rules dependency rule, the design device preferably marks the current design model of the variant as inconsistent until the user again causes the dependency rules to be applied.
  • the user can z. B. change the same attribute several times and thereby generate alternative design models of the variant.
  • Dependency rules apply to each alternative, which significantly speeds up the generation of alternatives.
  • the procedure just described provides a parameterized design model of the variant.
  • a non-parameterized design model is preferably generated from this parameterized design model.
  • the generated design model describes the surface of the variant of the technical system approximately by geometry elements, for. B. triangular and / or square surface elements.
  • the generated design model is preferably stored in a standardized data format, e.g. In Standard Transformation Language (STL) or Virtual Reality Modeling Language (VRML).
  • STL Standard Transformation Language
  • VRML Virtual Reality Modeling Language
  • This generated design model can be z. B. to a development partner or supplier for the technical system. It acts as a specification for the technical system to be built. It is possible to lock, hide or "hide” secret information from the parameterized design model so that it can be used the generation is not used and the generated design system does not have this information.

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Abstract

L'invention concerne un dispositif électronique servant à concevoir un système technique comprenant au moins deux composants. Ce dispositif de conception comprend une bibliothèque électronique (3.1) dans laquelle est stocké un modèle de conception initial (10.1, 11.1) de chaque composant. Chaque modèle de conception initial comprend au moins un objet géométrique présentant au moins un attribut. Un premier attribut peut être modifié par l'utilisateur, un deuxième non. La bibliothèque (3.1) comprend par ailleurs une prescription de dépendance pouvant être évaluée automatiquement, cette prescription déterminant de quelle manière le deuxième attribut dépend du premier attribut. Ce dispositif de conception est équipé pour produire un modèle de conception (10.2, 11.2) de chaque composant par copie du modèle de conception initial (10.1, 11.1) respectif. Il comprend des moyens (4.2, 5.2) pour modifier la copie de chaque attribut pouvant être modifié par l'utilisateur. Ce dispositif de conception est par ailleurs conçu pour adapter au moins une fois après modification de la copie du premier attribut à l'aide des moyens de modification la copie du deuxième attribut par application de la prescription de dépendance.
PCT/EP2006/004378 2005-05-14 2006-05-10 Dispositif de conception electronique WO2006122689A1 (fr)

Applications Claiming Priority (2)

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DE102005022388A DE102005022388B4 (de) 2005-05-14 2005-05-14 Elektronische Konstruktionsvorrichtung
DE102005022388.5 2005-05-14

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DE102010010466A1 (de) 2010-03-06 2010-12-02 Daimler Ag Computerbasiertes Konstruktionssystem

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WO2002025502A1 (fr) * 2000-09-21 2002-03-28 Daimlerchrysler Ag Modelisation parametrique de structures brutes en 3d
US20020156698A1 (en) * 2001-04-20 2002-10-24 Festo Ag & Co. Process for configuring a product or a product combination on a PC
EP1298547A1 (fr) * 2001-09-26 2003-04-02 Rheinmetall Landsysteme GmbH Procédé de conception d'un véhicule compliqué
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WO2002025502A1 (fr) * 2000-09-21 2002-03-28 Daimlerchrysler Ag Modelisation parametrique de structures brutes en 3d
US20020156698A1 (en) * 2001-04-20 2002-10-24 Festo Ag & Co. Process for configuring a product or a product combination on a PC
EP1298547A1 (fr) * 2001-09-26 2003-04-02 Rheinmetall Landsysteme GmbH Procédé de conception d'un véhicule compliqué
US20030144758A1 (en) * 2002-01-31 2003-07-31 Ravikiran Duggirala System and method for integrating geometric models
DE20317681U1 (de) * 2003-01-14 2004-02-19 Daimlerchrysler Ag Vorrichtung zum rechnerunterstützten Konstruieren

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SHAH J.J., M. MÄNTYLÄ: "Parametric and featurebased CAD/CAM : concepts, techniques, and applications (front pages and pp. 91-121)", 1995, JOHN WILLY & SONS, INC, ISBN: 0-471-00214-3, XP002389678 *

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