Control system having optimality decision means

A control system for controlling a predetermined characteristic of a subject which is controlled by a plurality of actuators, said control system comprising:

• a plurality of detection means for detecting a plurality of different data relating to a given parameter representing the predetermined characteristic of said subject and for producing output signals used for control of each of said actuators in response to the detected different data;
• and
• optimality decision means for synthetically judging a state of said characteristic of said subject on the basis of the output signals of said plurality of detection means in accordance with a predetermined rule and for supplying a control command for each of said plurality of actuators on the basis of a result of said judging;
• wherein said optimality decision means comprises:
• means for storing a plurality of reference patterns predetermined with respect to combinations of output signals of said detection means and for storing manipulated variables of said actuators corresponding to said plurality of reference patterns;
• and
• means for deriving the degree of conviction for said each reference pattern with respect to an output pattern given by a combination of output signals of said detection means and for determining manipulated variables of said plurality of actuators on the basis of said degree of conviction and manipulated variables of said actuators corresponding to the reference pattern.

A system for controlling a predetermined characteristic of a given controlled system by controlling a plurality of actuators, said system comprising:

• detection means for detecting a plurality of values of a parameter representing said predetermined characteristic and for outputting the values as a plurality of detected signals;
• pattern recognition means for receiving a combination of said plurality of detected signals as a pattern and for deriving degree of similarity of the combination of said detected signals to each of a plurality of predetermined reference patterns;
• means for processing said degree of similarity by using fuzzy inference and for determining the manipulated variable of said each actuator;
• and
• means for generating a command of said each actuator on the basis of said manipulated variable.

An optimality decision unit comprising:

• input means for receiving a combination of input signals representing a predetermined characteristic of a controlled system controlled by a plurality of actuators;
• means for judging if the state of said predetermined characteristic is satisfactory on the basis of said input signals and for determining manipulated variables of said plurality of actuators as a result of the judging;
• and
• output means for outputting control signals to said plurality of actuators on the basis of said determined manipulated variables;
• and
• wherein said manipulated variable determining means comprises:
• means for representing the state of said predetermined characteristic by a pattern obtained by a combination of said input signals;
• means for storing a plurality of reference patterns representing a representative shape of said pattern;
• means for deriving the degree of similarity between the pattern obtained by the combination of said input signals and each of said reference patterns;
• and
• means for determining the manipulated variable of each of said actuators on the basis of said degree of similarity.