Adjustment rule generating and control method and apparatus

• US 6,438,532 B1
• Filed: 01/23/1998
• Issued: 08/20/2002
• Est. Priority Date: 01/25/1997
• Status: Expired due to Term

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Kiji, Junichi
• Primary Examiner(s): Davis, George B.
• Application Number:
  US09/012,584
• Publication Number:
  US 20020026432A1
• Time in Patent Office: 1,670 Days
• Field of Search: 706/45, 706/46, 706/47, 706/48, 706/59
• US Class Current: 706/45
• CPC Class Codes: G05B 13/0265 the criterion being a learning criterion
• CPC Class Codes: G06N 5/025 Extracting rules from data

Abstract

An adjustment control method and apparatus of this invention assume that a dependency relationship table representing qualitative characteristics, in which manipulated variables are classified in units of change patterns of controlled variables, and are characterized in that an adjustment rule for adjustment is generated. An adjustment control method and apparatus of this invention is characterized in that it is determined whether the current object situation exhibits an exceptional behavior (vibration/saturation), on the basis of selection of an adjusted controlled variable and a manipulated variable obtained from an automatically generated adjustment rule and a past operation in response to an occasionally output deviation. If it is determined that no exceptional behavior is observed, the instruction of the generated adjustment rule is performed, otherwise, the correction amount of the. manipulated variable which is input to the object to be adjusted is given assuming that a predetermined input operation is performed.

Claims

1. A method for generating an adjustment rule used for an adjustment of making a first data group corresponding to outputs of a predetermined object have a desired value by determining a second data group corresponding to inputs to said object, the method comprising:

obtaining, from a dependency table which represents a dependency between said first data group and said second data group, predetermined first data influenced by predetermined second data, the predetermined first data corresponding to the output of said object and the predetermined second data corresponding to the inputs to said object, the dependency table being based on actual data obtained from said object;

selecting specific second data on the basis of the predetermined first data influenced by the predetermined second data and simultaneously selecting specific first data on the basis of the predetermined second data influencing the predetermined first data; and

combining said specific second data and said specific first data to generate an adjustment rule,

wherein said adjustment rule is used to adjust said object.

2. The method of claim 1, further comprising:

obtaining change characteristics between a particular subset of two of said predetermined first data with respect to one of said predetermined second data,

wherein said selecting includes the selecting of said specific second data based on the change characteristics.

3. The method of claim 1, wherein said selecting includes characterizing of said second data group and said first data group based on said dependency table.

4. An adjustment rule generating apparatus which is used for an adjustment of making a first data group corresponding to outputs of a predetermined object have a desired value by determining a second data group corresponding to inputs to said object, the apparatus comprising:

a storing device configured to store a dependency table which represents a dependency between said first data group and second data group, the dependency table being based on actual data obtained from said object;

a first selecting device configured to select, from the dependency table, predetermined first data influenced by predetermined second data, the predetermined first data corresponding to the outputs of said object and the predetermined second data corresponding to the inputs to said object;

a second selecting device configured to select specific second data on the basis of the predetermined first data influenced by the predetermined second data and simultaneously select specific first data on the basis of the predetermined second data influencing the predetermined first data; and

an adjustment rule generating device configured to generate an adjustment rule by combining said specific second data and said specific first data,

wherein said adjustment rule is used to adjust said object.

5. The apparatus of claim 4, wherein said second selecting device selects said specific second data based on a change characteristics between a particular subset of two of said predetermined first data with respect to one of said predetermined second data.

6. The apparatus of claim 4, wherein said second selecting device comprises a characterizing device configured to characterize said second data group and said first data group based on said dependency table.

7. An adjustment method of making a first data group corresponding to outputs of a predetermined object have a desired value by determining a second data group corresponding to inputs to said object, the method comprising:

generating an adjustment rule by;

preparing a dependency table which represents a dependency between said first group and said second data group, the dependency table being based on actual data obtained from said object;

obtaining, from the dependency table, predetermined first data influenced by predetermined second data, the predetermined first data corresponding to the outputs of said object and the predetermined second data corresponding to the inputs to said object;

selecting specific second data on the basis of the predetermined first data influenced by the predetermined second data and simultaneously selecting specific first data on the basis of the predetermined second data influencing the predetermined first data; and

combining said specific second data and said specific first data to generate the adjustment rule; and

adjusting said object by use of the generated adjustment rule.

8. The adjustment method of claim 7, further comprising:

repeating the generation of said adjustment rule, and storing a plurality of adjust rules;

calculating deviation between said desired value and a value of said first data which is output from said object;

selecting one of said plurality of adjustment rules to be applied to the next adjustment in relation to the deviation; and

determining a correction amount of the second data to be adjusted in accordance with said selected adjustment rule, as predetermined proportional amount of the deviation.

9. The adjustment method of claim 8, further comprising:

recording an adjustment history data which indicates the previous adjustment;

calculating said correction amount based on the adjustment history data; and

performing the present adjustment by the correction amount.

10. The adjustment method of claim 9, further comprising:

performing a test adjustment, thereby updating said adjustment history data; and

performing an actual adjustment by use of said updated adjustment history data after the test adjustment.

11. An adjustment system for making a first data group corresponding to outputs of a predetermined object have a desired value by determining a second data group corresponding to inputs to said object, the apparatus comprising:

a storing device configured to store a dependency table which represents a dependency between said first data group and said second data group, the dependency table being based on actual data obtained from said object;

an adjustment rule generating apparatus including;

a first selecting device configured to select, from the dependency table, predetermined first data influenced by predetermined second data, the predetermined first data corresponding to the outputs of said object and the predetermined second data corresponding to the inputs to said object;

a second selecting device configured to select specific second data on the basis of the predetermined first data influenced by the predetermined second data and simultaneously select specific first data on the basis of the predetermined second data influencing the predetermined first data;

an adjustment rule generating device configured to generate an adjustment rule by combining said specific second data and said specific first data; and

an adjustment control apparatus configured to adjust said object by use of the generated adjustment rule.

12. A recording medium stored thereon a computer readable program for enabling a computer to generate an adjustment rule used for an adjustment of making a first data group corresponding to outputs of a predetermined object have a desired value by determining a second data group corresponding to inputs to said object, said program comprising:

a first program unit for enabling the computer to store a dependency table which represents a dependency between said first data group and said second data group, the dependency table being based on actual data obtained from said object;

a second program unit for enabling the computer to select, from the dependency table, predetermined first data influenced by predetermined second data, the predetermined first data corresponding to the outputs of said object and the predetermined second data corresponding to the inputs to said object;

a third program unit for enabling the computer to select specific second data on the basis of the predetermined first data influenced by the predetermined second data and simultaneously select specific first data on the basis of the predetermined second data influencing the predetermined first data; and

a fourth program unit for enabling the computer to generate the adjustment rule by combining said specific second data and said specific first data,

wherein said adjustment rule is used to adjust said object.

13. An adjustment method of making a first data group corresponding to outputs of a predetermined object have a desired value by determining a second data group corresponding to inputs to said object, the method comprising:

obtaining, on the basis of data obtained from said object, predetermined first data influenced by predetermined second data, the predetermined first data corresponding to the outputs of said object and the predetermined second data corresponding to the inputs to said object;

selecting specific second data on the basis of the predetermined first data influenced by the predetermined second data and simultaneously selecting specific first data on the basis of the predetermined second data influencing the predetermined first data, the selecting being made based on change characteristics obtained by analyzing changes in two separate ones of said outputs due to changes in only one of said inputs; and

determining the specific second data capable of corresponding to the selected specific first data from the second data group,

wherein selecting step performs the selecting of the specific first data on the basis of the predetermined second data, and the selecting of the specific second data on the basis of the predetermined second data, by determining dependencies between each of said inputs and each of said outputs, so as to create a dependency characteristic data table, and by determining characteristic changes of each of said inputs in relation to a particular subset of two of said outputs, for every possible combination of two of said outputs, so as to create a controlled variable correlation characteristic data table, and

wherein the determining step uses information stored in both the dependency characteristics data table and the controlled variable correlation characteristic data table to provide a set of adjustment rules for the adjustment method,

wherein said set of adjustment rules are used to adjust said object.

14. An adjustment method of making a first data group corresponding to outputs of a predetermined object have a desired value by determining a second data group corresponding to inputs to said object, the method comprising:

obtaining, on the basis of data obtained from said object, predetermined first data influenced by predetermined second data, and change characteristics between the predetermined first data, the predetermined first data corresponding to the outputs of said object and the predetermined second data corresponding to the inputs to said object, the change characteristics being obtained by monitoring changes, if any, in two separate ones of the predetermined first data due to changes in one of the predetermined second data;

selecting specific first data having change characteristics between outputs capable of correcting the change characteristics between the first data from the first data; and

determining specific second data capable of corresponding to the selected specific first data from the second data group,

wherein said second data group is inputted to said object to obtain said second data group as outputs of said object having the desired value, to thereby