JPH05274378A - Automatic design cad system - Google Patents

Automatic design cad system

Info

Publication number
JPH05274378A
JPH05274378A JP7198192A JP7198192A JPH05274378A JP H05274378 A JPH05274378 A JP H05274378A JP 7198192 A JP7198192 A JP 7198192A JP 7198192 A JP7198192 A JP 7198192A JP H05274378 A JPH05274378 A JP H05274378A
Authority
JP
Japan
Prior art keywords
database
objective function
specifications
parts
graphic
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
JP7198192A
Other languages
Japanese (ja)
Inventor
Masaki Kumagai
雅樹 熊谷
Original Assignee
Toshiba Corp
株式会社東芝
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 Toshiba Corp, 株式会社東芝 filed Critical Toshiba Corp
Priority to JP7198192A priority Critical patent/JPH05274378A/en
Publication of JPH05274378A publication Critical patent/JPH05274378A/en
Granted legal-status Critical Current

Links

Abstract

(57) [Abstract] [Objective] The present invention automates everything from the selection of parts that make up a product to the arrangement of parts and the creation of design drawings, and minimizes the designer's experience and knowledge of the product as much as possible. The most important feature is that the construction period can be shortened and the design quality can be improved. According to the present invention, a graphic database and an attribute definition database for defining graphic information and attribute information of parts constituting a product, respectively, and a knowledge database defining an evaluation formula for selecting a component according to product specifications as an objective function. When designing a product by combining parts, each parameter of the determined product specifications is set, and based on this setting parameter and attribute information, the objective function is used to configure the part with the optimum solution. And if necessary,
The feature is that the graphic information of the corresponding part is extracted from the graphic database to create and output the design drawing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic design CAD system for automatically designing products composed of various parts.
The designer's experience with the product, especially when designing the product,
Automatic design CAD that minimizes the knowledge as much as possible to shorten the design period and improve the design quality.
It is about the system.

[0002]

2. Description of the Related Art Conventionally, in the design of products in the technical field such as CAD, the mainstream is to draw a drawing while talking with an operator using a display device, a keyboard, a mouse, etc. In the case of selecting the components that make up the component, the component list is displayed on the display screen of the display device, and the operator is instructed which component to select. Further, it is necessary to check the specifications of the parts or check the consistency of the combination of the parts with a handbook of parts or the like, which greatly depends on the technical ability of the designer.

However, such a conversational CA
The use of D has a problem in that it is not possible to meet the needs of the market for shortening the design period and improving the design quality for products that are becoming more and more complicated and diversified in recent years. In addition, there is a problem that advanced design experience and knowledge largely depend on the technical ability of the designer.

[0004]

As described above, in the conventional method, the design experience and knowledge greatly depend on the technical ability of the designer, and it is necessary to respond to the shortening of the design period and the improvement of the design quality. There was a problem that I could not.

The object of the present invention is to automatically perform the processes from selection of parts constituting a product to arrangement of parts and creation of design drawings, and to minimize the experience and knowledge of the product of the designer as much as possible to reduce the design period. It is to provide an extremely reliable automatic design CAD system capable of shortening and improving design quality.

[0006]

In order to achieve the above object, in an automatic design CAD system for automatically designing a product composed of various parts, the invention according to claim 1 proposes a candidate for composing the product. Design the product, the attribute definition database that defines the attribute information such as specifications of parts, cost, and delivery date, the knowledge database that defines the evaluation formula that selects the parts that are configured from the product specifications as the objective function. In this case, based on the parameter setting means for setting each parameter required for component selection based on the determined product specifications, and the parameter information set in the parameter setting means and the attribute definition database,
And an objective function evaluation means for determining a component configuration based on an optimal solution of the objective function using the objective function defined in the knowledge database, and the invention according to claim 2 constitutes a product. From the product database, a graphic database that defines graphic information such as the shapes of candidate parts, an attribute definition database that defines attribute information such as specifications, costs, and delivery dates of candidate parts that make up the product. A knowledge database in which an evaluation formula for selecting components is defined as an objective function, and a parameter setting means for setting each parameter necessary for component selection based on a determined product specification when designing a product, Based on the parameters set in the parameter setting means and the attribute information defined in the attribute definition database, the eyes defined in the knowledge database Objective function evaluating means for determining a component configuration by an optimal solution of the objective function using a function, and when all the component configurations are determined by the objective function evaluating means, each component constituting the corresponding product from the graphic database It is configured to include drawing creating means for taking out the graphic information of (1) and creating a design drawing, and output means for outputting the design drawing created by the drawing creating means.

[0007]

Therefore, in the automatic design CAD system of the present invention, the design experience and knowledge can be accumulated in the system, so that the design experience and knowledge do not depend on the technical ability of the designer. It is possible to automatically perform from the selection of the parts that make up the product to the arrangement of parts and the creation of design drawings. As a result, the design period can be shortened and the design quality can be improved.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to graphic information of parts constituting a product,
A graphic database and an attribute definition database that respectively define and attribute information, and a knowledge database that defines an evaluation formula for selecting a component configured from product specifications as an objective function, and when designing a product by combining components, Set each parameter of the determined product specifications, and based on the set parameters and the attribute information of the attribute definition database, determine the component configuration with its optimal solution using the objective function, and if necessary, This is to extract the graphic information of the corresponding part from the graphic database, create a design drawing, and output it. An embodiment of the present invention based on the above concept will be described below in detail with reference to the drawings.

FIG. 1 is a block diagram showing a configuration example of an automatically designed CAD system according to the present invention. In FIG.
The automatically designed CAD system of this embodiment is a keyboard 1
A display device 2, a mouse 3 which is one of input devices, a graphic database 4 and an attribute definition database 5 which are parts libraries, and a knowledge database 6.
It comprises a processing device 7 and a printer 8 as an output means.

Here, the keyboard 1, the display device 2 and the mouse 3 define graphic information such as shapes of parts which are candidates for composing a product and register it in the graphic database 4.
The knowledge database 6 is defined by defining an evaluation formula for selecting a component made up of product specifications as an objective function, which defines attribute information such as specifications, costs, delivery dates, etc. of parts constituting the above product and registers it in the attribute definition database 5. To be registered with. Further, the keyboard 1 sets, in the processing device 7, each parameter required for component selection based on a determined product specification when designing a product.

On the other hand, the graphic database 4 is for storing the graphic information defined above. The attribute definition database 5 is for storing the attribute information defined above. Furthermore, knowledge database 6
Is for storing the objective function defined above. Since the knowledge database 6 can be stored as product design know-how, the objective function can be added or changed by the keyboard 1 and the display device 2.

On the other hand, the processing device 7 comprises a parameter sheet table 71 which is a parameter setting means, an objective function evaluation section 72, and a drawing creation section 73. The parameter sheet table 71 is for storing each parameter set by the keyboard 1. In addition, the objective function evaluation unit 72 uses the objective function stored in the knowledge database 6 based on the parameters set in the parameter sheet table 71 and the attribute information stored in the attribute definition database 5, The optimal solution of the objective function determines the component configuration. Further, the drawing creation unit 73, when the objective function evaluation unit 72 determines all the component configurations, extracts the graphic information of each component forming the corresponding product from the graphic database 4 and creates a design drawing. is there. Furthermore, the printer 8 is for outputting the design drawing created by the drawing creating unit 73. Next, the operation of the automatically designed CAD system of the present embodiment configured as described above will be described using the flow chart shown in FIG.

First, prior to designing a product, using the keyboard 1, the display device 2, and the mouse 3, graphic information such as the shapes of parts that are candidates for the product and attributes such as specifications, costs, and delivery dates. Information is defined and registered in the graphic database 4 and the attribute definition database 5, respectively. Next, using the keyboard 1, the display device 2, and the mouse 3, an evaluation formula for selecting a component made up of product specifications is defined as an objective function and registered in the knowledge database 6. Next, when the product specifications are determined, the keyboard 1 is used to set the parameters required for component selection in the parameter sheet table 71 of the processing device 7 based on the determined product specifications. Then, in the objective function evaluation unit 72 of the processing device 7, the value of the parameter set in the parameter sheet table 71 and the value of the attribute information stored in the attribute definition database 5 are stored in the knowledge database 6. Substituting the objective function into the objective function, the optimal solution of the objective function is used to determine the optimum component that constitutes the product.
Next, when all the component configurations are determined by the same procedure as described above, the drawing creation unit 73 of the processing device 7 retrieves the graphic information of each component forming the corresponding product from the graphic database 4 and creates the design drawing. create. And the printer 8
Then, the design drawing created by the drawing creating unit 73 is output. Next, the above will be described more specifically.

Now, for example, as shown in FIG. 3, assuming that the type of a part is a part A and part B to part N for a certain product, the selection range of each part is divided into a plurality of model types and individually selected. It has a graphic database 4 and an attribute definition database 5. Further, it is assumed that the parts for each model have attribute information such as specifications, costs and delivery dates as shown in FIG. 4, and this attribute information is registered in the attribute definition database 5. Furthermore, the knowledge database 6
Design know-how such as mutual constraint conditions between each part is registered as an objective function. FIG. 5 is a diagram showing an example of this objective function. In FIG. 5, the function f 1 is the part A
When a 1 is selected in step B, the part B must be b 2 . Further, in the function f 2 , if a 3 is selected in the part A, then b 3 must not be selected in the part B. Furthermore, in the function f 3 , the weight of the parts A + B + C must be less than or equal to the weight of the part N. Furthermore, the specifications of the product are, for example, as shown in FIG.
It is defined by, and shows the constraint condition when it is regarded as one product.

From the above, the parts constituting the product are determined. In this case, if there is a part that cannot be determined or there is a contradiction in the constraint conditions, the knowledge database 6 is reviewed and a more accurate system can be constructed.

As described above, the automatic design CA of this embodiment is used.
The D system defines a graphic database 4 in which graphic information such as shapes of candidate parts constituting a product is defined, and attribute information such as specifications, costs and delivery dates of candidate parts forming a product. Attribute definition database 5
A knowledge database 6 in which an evaluation formula for selecting components to be configured from product specifications is defined as an objective function, and parameters for setting each parameter necessary for component selection based on the determined product specifications when designing a product Based on the parameter sheet table 71 which is the setting means, the parameters set in the parameter sheet table 71 and the attribute information defined in the attribute definition database 5, the purpose is defined by using the objective function defined in the knowledge database 6. Objective function evaluation unit 7 that determines the component configuration based on the optimum solution of the function
2. When all the object configurations are determined by the objective function evaluation unit 72, a processing device including a drawing creation unit 73 that extracts the graphic information of each of the parts that make up the corresponding product from the graphic database 4 and creates a design drawing 7 and a printer 8 which is an output means for outputting the design drawing created by the processing device 7.

Therefore, by expressing the design constraint conditions in the knowledge database 6, it is possible to eliminate ambiguity and easily accumulate design experience and knowledge in the system. As a result, design experience and knowledge can be automatically performed from selection of parts that make up a product based on order specifications to arrangement of parts and creation of design drawings without depending on the technical capabilities of the designer. Therefore, it is possible to shorten the design period and improve the design quality.

In the above embodiment, the graphic database 4, the drawing creation unit 73, and the printer 8 are not essential elements of the present invention, and in a system in which these elements are omitted, a product based on order specifications is constructed. It becomes possible to automatically select the parts to be used (it becomes easy to arrange the parts).

[0019]

As described above, according to the present invention, a graphic database and an attribute definition database that respectively define graphic information and attribute information of parts that make up a product, and an evaluation that selects a part that is made up of product specifications With a knowledge database that defines expressions as objective functions, when designing a product by combining parts, set each parameter of the determined product specifications, and based on this setting parameter and attribute information, the objective function The component composition is determined by the optimal solution using, and if necessary, the graphic information of the relevant component is extracted from the graphic database and the design drawing is created and output. From the selection of parts to the arrangement of parts and the creation of design drawings automatically to minimize the designer's experience and knowledge of the product as much as possible. Shortening and design quality highly reliable automatic design CAD system capable of improving the can be provided.

[Brief description of drawings]

FIG. 1 is a block diagram showing an embodiment of an automatically designed CAD system according to the present invention.

FIG. 2 is a flow chart for explaining the operation in the same embodiment.

FIG. 3 is a diagram showing an example of a component structure of a product in the embodiment.

FIG. 4 is a diagram showing an example of an attribute definition database in the embodiment.

FIG. 5 is a diagram showing an example of an objective function of the knowledge database in the embodiment.

FIG. 6 is a diagram showing an example of a parameter sheet table in the embodiment.

[Explanation of symbols]

1 ... Keyboard, 2 ... Display device, 3 ... Mouse,
4 ... Graphic database, 5 ... Attribute definition database, 6
... Knowledge database, 7 ... Processing device, 71 ... Parameter sheet table, 72 ... Objective function evaluation section, 73 ... Drawing creation section, 8 ... Printer.

Claims (2)

[Claims]
1. In an automatic design CAD system for automatically designing a product composed of various parts, an attribute definition database in which attribute information such as specifications, costs and delivery dates of parts which are candidates for the product is defined. And a knowledge database in which the evaluation formulas for selecting the components made up of the product specifications are defined as the objective function, and when designing the product, set the parameters required for component selection based on the determined product specifications. Based on the parameter setting means, the parameter set in the parameter setting means, and the attribute information defined in the attribute definition database, the objective function defined in the knowledge database is used to optimize the objective function. An automatic design CAD system comprising: an objective function evaluation means for determining a component configuration by a solution.
2. In an automatic design CAD system for automatically designing a product composed of various parts, a graphic database in which graphic information such as shapes of parts which are candidates for the product is defined, and the product An attribute definition database in which attribute information such as specifications, costs, and delivery dates of candidate components to be configured is defined, and a knowledge database in which an evaluation formula for selecting components to be configured from product specifications is defined as an objective function, When designing a product, parameter setting means for setting each parameter required for component selection based on the determined product specifications, parameters set in the parameter setting means and attributes defined in the attribute definition database Based on the information and the objective function defined in the knowledge database, the optimum solution of the objective function is used to determine the component structure. And a drawing for creating a design drawing by taking out graphic information of each part constituting the corresponding product from the graphic database when all the component configurations are determined by the objective function evaluating means. An automatic design CAD system comprising: creating means and output means for outputting the design drawing created by the drawing creating means.
JP7198192A 1992-03-30 1992-03-30 Automatic design cad system Granted JPH05274378A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7198192A JPH05274378A (en) 1992-03-30 1992-03-30 Automatic design cad system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7198192A JPH05274378A (en) 1992-03-30 1992-03-30 Automatic design cad system

Publications (1)

Publication Number Publication Date
JPH05274378A true JPH05274378A (en) 1993-10-22

Family

ID=13476155

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7198192A Granted JPH05274378A (en) 1992-03-30 1992-03-30 Automatic design cad system

Country Status (1)

Country Link
JP (1) JPH05274378A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008108282A (en) * 2008-01-11 2008-05-08 Fujitsu Ltd Model management device and recording medium
JP2009276979A (en) * 2008-05-14 2009-11-26 Toyota Motor Corp Merchandise design support device and merchandise design support program
JP6368421B1 (en) * 2017-12-21 2018-08-01 株式会社Cygames Program, system, electronic apparatus, and method for recognizing solid
US10318703B2 (en) 2016-01-19 2019-06-11 Ford Motor Company Maximally standard automatic completion using a multi-valued decision diagram

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008108282A (en) * 2008-01-11 2008-05-08 Fujitsu Ltd Model management device and recording medium
JP2009276979A (en) * 2008-05-14 2009-11-26 Toyota Motor Corp Merchandise design support device and merchandise design support program
US10318703B2 (en) 2016-01-19 2019-06-11 Ford Motor Company Maximally standard automatic completion using a multi-valued decision diagram
US10318701B2 (en) 2016-01-19 2019-06-11 Ford Motor Company Resolving configuration conflicts using a multi-valued decision diagram
US10318702B2 (en) 2016-01-19 2019-06-11 Ford Motor Company Multi-valued decision diagram reversible restriction
US10325063B2 (en) 2016-01-19 2019-06-18 Ford Motor Company Multi-valued decision diagram feature state determination
JP6368421B1 (en) * 2017-12-21 2018-08-01 株式会社Cygames Program, system, electronic apparatus, and method for recognizing solid
WO2019124194A1 (en) * 2017-12-21 2019-06-27 株式会社Cygames Program, system, electronic device, and method for recognizing three-dimensional structure

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