| 摘要 |
<p>In order to output a value calculated by using a controlled variable, a manipulated variable and a usable disturbance value and used to bring a predicted value of the controlled variable into agreement with or close to a desired value S to an operation means having a small number of preset levels (to convert preset values to a series of integer values), the ripple of the controlled variable are evaluated at a pole having the smallest memory effect, and the control period is determined; a correction value expressed by a linear equation of an integrated value of fractions which are rounded to integers and a sign of the change in the manipulated variable added to convert the value into an integer and to output the integer as a manipulated variable; and thus it is possible for the manipulated variable to vary between the preset values (between n and n+1 in the diagramed example) which are acquired values on both sides of a desired value S. When the difference between the acquired value of the manipulated variance and the desired value is great, the correcting value need not be added. The ripple of the controlled variance is small and deviation between the controlled variance and the desired value is small.</p> |
