DEVICE AND METHOD FOR CLASSIFYING/DISPLAYING DIFFERENT DESIGN SHAPE HAVING SIMILAR CHARACTERISTICS

• US 20090326875A1
• Filed: 04/09/2009
• Published: 12/31/2009
• Est. Priority Date: 06/27/2008
• Status: Abandoned Application

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Anai, Hirokazu, Yanami, Hitoshi
• Application Number:
  US12/421,418
• Publication Number:
  US 20090326875A1
• Time in Patent Office: Days
• US Class Current: 703/1
• CPC Class Codes: G06F 2111/06 Multi-objective optimisation, e.g. Pareto optimisation using simulated annealing [SA], ant colony algorithms or genetic algorithms [GA]
• CPC Class Codes: G06F 30/20 Design optimisation, verification or simulation optimisation, verification or simulation of circuit designs G06F30/30

Abstract

A system displays an area which a desired objection function value of a plurality of objective functions as a possible area in objective space corresponding to the objective function on the basis of each of the plurality of objective function value sets calculated for a plurality of design parameter sample sets; calculates a design parameter set in design space corresponding to the neighborhood area of a position in the objective space based on the position specification in relation to position specification by a user in the possible area of the objective space; and calculates and displays a representative design shape corresponding to the calculated design parameter set.

Claims

1. A device for classifying/displaying design shapes whose characteristics are similar but whose shapes are different in a design support apparatus for supporting determination of an optimal design parameter set by inputting a plurality of design parameter sets, calculating a plurality of objective functions on the basis of a prescribed calculation, and applying a multi-objective optimization process to the plurality of objective functions, said device comprising:

an objective space display unit to display an area which a value of arbitrarily-selected objective functions of the plurality of objective functions can take on the basis of a plurality of objective function values each of which is calculated for the plurality of the design parameter sample sets, the area being displayed as a possible area in objective space corresponding to the arbitrarily-selected objective functions;

an objective space-corresponding design space calculation unit to calculate the design parameter set in design space corresponding to a neighborhood area of a position in the objective space based on the position specified by a user in the possible area in the objective space corresponding to the arbitrarily-selected objective functions, the possible area being displayed by the objective space display unit; and

a representative shape display unit to calculate and display a representative design shape corresponding to the design parameter set calculated by the objective space-corresponding design space calculation unit.

3. The device of claim 1, further comprising

a design parameter classification unit to classify the design parameter sets calculated by the objective space-corresponding design space calculation unit into a plurality of groups, and wherein

the representative shape display unit calculates and displays a representative design shape corresponding to a design parameter set representing each group classified by the design parameter classification unit.

4. The device of claim 1, wherein

said objective space-corresponding design space calculation unit comprises:

a function value calculation unit to calculate each mapped point in the objective space corresponding to each of the design parameter sets constituting a plurality of grid points for dividing the design space; and

an inverse mapper to calculate the design parameter set constituting the grid point corresponding to a mapped point, included in a neighborhood area of a position in the objective space based on the position specified by the user, of the mapped points, as the design parameter set in the design space corresponding to the neighborhood area of the position in the objective space based on the position specified by the user.

5. The device of claim 1, wherein

said design parameters are parameters for determining a shape of a slider unit of a hard disk magnetic storage device.

2. A device for classifying/displaying design shapes whose characteristics are similar but whose shapes are different in a design support apparatus for supporting determination of an optimal design parameter set by inputting a plurality of design parameter sets, calculating a plurality of objective functions on the basis of a prescribed calculation, and applying a multi-objective optimization process to the plurality of objective functions, said device comprising:

a sample set objective function calculation unit to calculate the plurality of objective function sets for a prescribed number of the design parameter sample sets;

an objective function approximation unit to mathematically approximate the plurality of objective functions on the basis of the prescribed number of sets of the design parameter sample sets and a plurality of objective function sets calculated in relation to the prescribed number of sets of the design parameter sample sets;

an inter-objective function logical expression calculation unit to calculate a logical expression indicating a logical relationship among arbitrarily-selected two or more objective functions of the plurality of mathematically approximated objective functions as an inter-objective function logical expression;

an objective space display unit to display an area which the two or more objective functions can take, as a possible area in objective space corresponding to the two or more objective functions;

an objective space-corresponding design space calculation unit to calculate the design parameter set in design space corresponding to a neighborhood area of a position in the objective space based on the position specified by a user in the possible area of the objective space corresponding to the two or more objective functions displayed by the objective space display unit; and

a representative shape display unit to calculate and display a representative design shape corresponding to a design parameter set calculated by the objective space-corresponding design space calculation unit.

6. The device of claim 2, further comprising

a design parameter classification unit to classify the design parameter sets calculated by the objective space-corresponding design space calculation unit into a plurality of groups, and wherein

the representative shape display unit calculates and displays a representative design shape corresponding to a design parameter set representing each group classified by the design parameter classification unit.

7. The device of claim 2, wherein

said objective space-corresponding design space calculation unit comprises:

a function value calculation unit to calculate each mapped point in the objective space corresponding to each of the design parameter sets constituting a plurality of grid points for dividing the design space; and

an inverse mapper to calculate the design parameter set constituting the grid point corresponding to a mapped point, included in a neighborhood area of a position in the objective space based on the position specified by the user, of the mapped points, as the design parameter set in the design space corresponding to the neighborhood area of the position in the objective space based on the position specified by the user.

8. The device of claim 2, wherein

said design parameters are parameters for determining a shape of a slider unit of a hard disk magnetic storage device.

9. A storage medium on which is recorded a program for enabling a computer for supporting determination of an optimal design parameter set by inputting a plurality of design parameter sets, calculating a plurality of objective functions on the basis of a prescribed calculation and applying a multi-objective optimization process to the plurality of objective functions, said program enables the computer to perform a method, the method comprising:

displaying an area which a value of arbitrarily-selected objective functions of the plurality of objective functions can take on the basis of a plurality of objective function values each of which is calculated for the plurality of the design parameter sample sets, the area being displayed as a possible area in objective space corresponding to the arbitrarily-selected objective functions;

calculating the design parameter set in design space corresponding to a neighborhood area of a position in the objective space based on the position specified by a user in the possible area in the objective space corresponding to the arbitrarily-selected objective function displayed with the act of displaying an area; and

calculating and displaying a representative design shape corresponding to the design parameter set calculated with the act of calculating the design parameter set.

10. The storage medium according to claim 9, wherein

said program further enables the computer to perform:

classifying the design parameter sets calculated by the act of calculating the design parameter set, and wherein

in the act of calculating and displaying a representative design shape, a representative design shape corresponding to a design parameter set representing each group classified by the act of classifying the design parameter sets is calculated and displayed.

11. The storage medium according to claim 9, wherein

the act of calculating the design parameter set in design space comprises:

calculating each mapped point in the objective space corresponding to each of the design parameter sets constituting a plurality of grid points for dividing the design space; and

calculating the design parameter set constituting the grid point corresponding to a mapped point, included in a neighborhood area of a position in the objective space based on the position specified by the user, of the mapped points, as the design parameter set in the design space corresponding to the neighborhood area of the position in the objective space based on the position specified by the user.

12. The storage medium according to claim 9, wherein

said design parameters are parameters for determining a shape of a slider unit of a hard disk magnetic storage device.