Control system for plant

A control method for a plant, comprising the steps of:

• a) identifying a model parameter vector of a controlled object model obtained by modeling said plant;
• and
• b) controlling said plant using the identified model parameter vector;
• said step a) of identifying the model parameter vector, comprising the steps of:
• i) calculating an identifying error of the model parameter vector;
• ii) calculating an updating vector according to the calculated identifying error, the updating vector having at least one first element relevant to an input or an output of said plant, and a second element irrelevant to the input and the output of said plant;
• and
• iii) correcting the updating vector by multiplying a past value of the at least one first element of said updating vector by a predetermined value between about “0” and about “1”, and multiplying a past value of the second element of said updating vector by a value of about “1”;
• iv) calculating the model parameter vector by adding the corrected updating vector to a reference vector of the model parameter vector.

A computer program for causing a computer to carry out a control method for a plant, said control method comprising the steps of:

• a) identifying a model parameter vector of a controlled object model obtained by modeling said plant;
• and
• b) controlling said plant using the identified model parameter vector;
• said step a) of identifying the model parameter vector, comprising the steps of:
• i) calculating an identifying error of the model parameter vector;
• ii) calculating an updating vector according to the calculated identifying error, the updating vector having at least one first element relevant to an input or an output of said plant, and a second element irrelevant to the input and the output of said plant;
• and
• iii) correcting the updating vector by multiplying a past value of the at least one first element of said updating vector by a predetermined value between about “0” and about “1”, and multiplying a past value of the second element of said updating vector by a value of about “1”;
• iv) calculating the model parameter vector by adding the corrected updating vector to a reference vector of the model parameter vector.