Evolutionary controlling system with behavioral simulation

• US 6,064,996 A
• Filed: 09/29/1997
• Issued: 05/16/2000
• Est. Priority Date: 09/27/1996
• Status: Expired due to Fees

• Current Assignee: Yamaha Hatsudoki Kabushiki Kaisha (Yamaha Corporation)
• Original Assignee: Yamaha Hatsudoki Kabushiki Kaisha (Yamaha Corporation)
• Inventors: Yamaguchi, Masashi, Kamihira, Ichikai
• Primary Examiner(s): Hafiz, Tariq R.
• Assistant Examiner(s): PENDER JR, MICHAEL J
• Application Number:
  US08/939,316
• Time in Patent Office: 960 Days
• Field of Search: 706/13
• US Class Current: 706/13
• CPC Class Codes: F02D 2041/1437 Simulation
• CPC Class Codes: F02D 41/1401 characterised by the control or regulation method F02D41/1473, F02D41/1477 take precedence
• CPC Class Codes: F02D 41/1405 Neural network control
• CPC Class Codes: G05B 13/0265 the criterion being a learning criterion
• CPC Class Codes: G06N 3/126 Evolutionary algorithms, e.g. genetic algorithms or genetic programming
• CPC Class Codes: Y02T 10/72 Electric energy management in electromobility

Abstract

An evolutionary control for a subject such as an engine installed in a vehicle is conducted by the steps of: selecting coefficients, as genes, affecting the control characteristics of the control system; creating plural control units as chromosomes, each being constituted by plural genes; expressing the genes of each chromosome as control characteristics by conducting behavioral simulation on each chromosome; selecting at least one chromosome from the created chromosomes based on the result of the behavioral simulation; and causing the at least one chromosome to evolve using a genetic algorithm, thereby obtaining control characteristics suitable for the user. In this method, the characteristics of the product can easily be adjusted after its purchase.

Claims

1. A method for adapting operation of a drive unit specifically to an individual user who manipulates output of the drive unit, said drive unit being operable by an operation signal outputted from a control unit when receiving a pre-selected signal including a signal from the user, said method comprising the steps of:

(a) providing a computer simulation of the drive unit, said simulation simulating drive unit operation and comprising a drive unit simulation and a control unit simulation programmed to formulate plural control modules, each outputting an operation signal for operating the drive unit when receiving a pre-selected signal including a signal from the user;

(b) operating, by the user, the simulation by the steps of;

(i) formulating multiple control modules under predetermined rules;

(ii) inputting to the multiple control modules a pre-selected signal including a signal from the user to output from each control module an operation signal into the drive unit simulation;

(iii) manipulating output of the drive unit simulation by the user;

(iv) selecting at least one control module from the multiple control modules, which is adaptive to the user'"'"'s manipulation pattern;

(v) formulating subsequent multiple control modules based on the selected control module(s), if the selected control module is not final; and

(vi) repeating steps (ii) through (v) until the drive unit simulation is operated adaptively to the user, wherein a finally selected control module is obtained;

(c) saving the finally selected control module in a memory; and

(d) operating, by said user, said drive unit using the control module which retrieves the finally selected module from the memory, wherein the drive unit is operated adaptively to the user.

2. The method according to claim 1, wherein said memory is an IC card or a floppy disc which is detachable from the control unit simulation and is attachable to the control unit of the drive unit.

3. The method according to claim 1, wherein said simulation is constituted by a communication network composed of plural external devices.

4. The method according to claim 1, wherein said drive unit is a motor for a vehicle.

5. The method according to claim 1, wherein the input-output relationship of each control module is regulated by parameters, and in step (v), the multiple control modules are formulated by genetic algorithms wherein the parameters are used as genes.

6. The method according to claim 1, wherein said control unit of said drive unit is programmed to formulate plural control modules, each outputting an operation signal for operating the drive unit when receiving a pre-selected signal including a signal from the user;

said method further comprising the steps of;

(e) while operating said drive unit after step (d), formulating multiple control modules under predetermined rules;

(f) inputting to the multiple control modules a pre-selected signal including a signal from the user to output from each control module an operation signal into the drive unit;

(g) manipulating output of the drive unit by the user;

(h) real-time selecting at least one control module from the multiple control modules, which is adaptive to the user'"'"'s manipulation pattern;

(i) formulating subsequent multiple control modules based on the selected control module(s), if the selected control module is not final; and

(j) repeating steps (f) through (i) until the drive unit is operated adaptively to the user, wherein a finally selected control module is obtained.