| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve the limit of control while maintaining the total sum of manipulated variables to a value which is equal to or more than the lower limit value of the total sum of manipulated variables. <P>SOLUTION: A control device includes: PID arithmetic parts 22-1 and 22-2 for calculating manipulated variables MV1 and MV2 on the basis of a deviation between manipulated variables PV1 and PV2 and set values SP1 and SP2 of each control loop; manipulated variable total sum calculation parts 31-1 and 31-2 for calculating total sum MV_all of the manipulated variables MV1 and MV2; and manipulated variable fixing parts 32-1 and 32-2 for, when the manipulated variable total sum MV_all reaches a preliminarily specified manipulated variable total sum lower limit value, and becomes equal to or less than the lower limit value, fixing the manipulated variables MV1 and MV2 to a value based on the manipulated variables MV1 and MV2 at a point of time when the reach is generated. <P>COPYRIGHT: (C)2010,JPO&INPIT</p> |
