Method and apparatus for assisting the design of parts of a product

• US 5,555,406 A
• Filed: 08/30/1994
• Issued: 09/10/1996
• Est. Priority Date: 08/30/1993
• Status: Expired due to Fees

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Nozawa, Takashi
• Primary Examiner(s): Teska, Kevin J.
• Assistant Examiner(s): LOUIS JACQUES, JACQUES H
• Application Number:
  US08/298,012
• Time in Patent Office: 742 Days
• Field of Search: 364/578, 364/148, 364/151, 364/152, 364/149, 364/178, 364/500, 364/468, 364/478, 364/403, 364/552, 364/401, 364/132, 364/488-491, 364/474.01, 364/474.02 , 364/474.16, 364/474.24, 364/512, 364/551.01, 364/474.13, 364/474.15, 364/474.17, 364/469, 395/500, 395/10, 395/914, 395/65, 395/11, 395/62, 395/75, 395/904, 395/13, 395/21, 395/51, 395/921, 395/919
• US Class Current: 703/1
• CPC Class Codes: G06F 30/00 Computer-aided design [CAD]

Abstract

A design assisting apparatus for assisting the design of parts of a product comprised of an assembly of a plurality of parts. The design assisting apparatus is comprised of a plurality of part suitability examination devices and a product suitability examination device. Each part suitability examination device is comprised of a part performance decision device, a part knowledge data base for each input, and a part optimization device. The part optimization device optimizes the initially input parameters of a part by referring to the part knowledge stored in the corresponding part knowledge data base. The product suitability examination device comprises a product performance decision device, a product knowledge data base, and a product optimization device. The product optimization device optimizes the parameters of the parts constituting the product by referring to the product knowledge stored in the product knowledge data base. The parameters of the plurality of parts output by the part suitability examination device are optimized to satisfy the target performances for the product and then are output. Also, a method for the same.

Claims

1. A design assisting apparatus for assisting in design of parts of a product made of an assembly of the parts, said design assisting apparatus comprising:

a) a plurality of part suitability examination means, each of said part suitability examination means including;

(a1) a part performance decision means for deciding if target performances for said part are satisfied;

(a2) a part knowledge data base for storing part knowledge to enable each of said parts in the assembly of the parts to satisfy the target performances of said part; and

(a3) a part optimization means for optimizing parameters of a part by referring to the part knowledge stored in said part knowledge data base so that said part satisfies said target performances for said part, said part optimization means optimizes the parameters when said part does not satisfy the target performances for said part before the optimizing, wherein initially input parameters are first optimized to satisfy the target performances of said parts and then outputted; and

b) a said product suitability examination means including;

(b1) a product performance decision means for deciding if said product satisfies target performances for the product;

(b2) a product knowledge data base storing product knowledge to enable said product to satisfy said target performances of said product; and

(b3) a product optimization means for optimizing said parameters of said parts of said assembly of the parts constituting said product by referring to said product knowledge stored in said product knowledge data base so that said product satisfies said target performances for said product, said product optimization means optimizes the parameters when said product does not satisfy said target performances of said product under existing parameters, wherein the parameters of said plurality of parts outputted by said part suitability examination means are first optimized to satisfy said target performances for said product and then outputted.

2. The design assisting apparatus according to claim 1, wherein:

said target performances which each of said part performance decision means use as indicators for their decisions are basic part performances;

said part knowledge stored in the part knowledge data bases is knowledge for enabling each of said parts in the assembly of the parts to satisfy said basic part performances;

said target performances which said product performance decision means uses as indicators for decisions are overall product performances;

said product knowledge stored in said product knowledge data base is knowledge for enabling said product to satisfy said overall product performances of said product;

said part suitability examination means optimizing and outputting the parameters initially input for each of the plurality of parts by referring to said part knowledge stored in said part knowledge data base so as to satisfy said basic part performances of said part when said part does not satisfy said basic part performances of said part under existing parameters; and

said product suitability examination means optimizing and outputting said parameters of said parts of the assembly of the pans outputted by said part suitability examination means by referring to said product knowledge stored in said product knowledge data base so as to satisfy said overall product performances of said product in the case where said product does not satisfy said overall product performance of said product under existing parameters.

3. A method for assisting in design of parts of a product made of an assembly of the parts, said method for assisting design comprising:

a) deciding if each of said parts satisfies corresponding target performances of said part;

b) optimizing and outputting initially input parameters of said parts so that each said parts satisfies the corresponding target performances of said part by referring to knowledge for enabling each of said parts to satisfy said target performances of said part stored in a corresponding part knowledge data base for satisfying the target performances of said part when each of said parts does not satisfy the target performances of that part under existing parameters;

c) deciding if the product comprised of the assembly of parts with said parameters optimized to satisfy said target performances of said parts satisfies target performances for said product; and

d) optimizing and outputting said parameters to satisfy the target performances of the parts, so as to satisfy the target performances of the product by referring to knowledge for enabling said product to satisfy said target performances of said product stored in a product knowledge data base for satisfying the target performances of the product to optimize the parameters of the parts of the assembly, in the case where the product does not satisfy the performances of said product under existing parameters.

4. The method for assisting in design of parts of a product made of an assembly of the parts according to claim 3, wherein:

said target performances which are used as indicators for decision of part suitability are basic part performances;

said part knowledge stored in said part knowledge data bases is knowledge for enabling each of said parts in the assembly to satisfy said basic part performances of said parts;

said target performances which are used as indicators for decision of product suitability are overall performances;

said product knowledge stored in said product knowledge data base is knowledge for enabling said product to satisfy said overall performances of said product;

said optimizing and outputting of said initially input parameters of said parameters of said parts are performed by referring to part knowledge stored in corresponding knowledged part data bases so that each of said pans satisfies said basic part performances of said part when said part does not satisfy said basic part performance of said part under existing parameters; and

said optimizing and outputting of said parameters optimized to satisfy said basic part performances of said parts are performed by referring to said product knowledge stored in said product knowledge data base so that said product satisfies said overall product performances for said product when said product does not satisfy said overall product performances of said product under existing parameters.