| 摘要 |
A system for controlling a process system subject to an external disturbance by adjusting the value of a control amount output from the process system to a given target value. The system includes a target value generating unit (10) for generating a given target value, and a main control unit (16) receiving the target value and the control amount value for performing control operations to surpress fluctuation of the control amount value produced by the external disturbance and to adjust the control amount value to the given target value. The main control unit includes a surpressing unit (11,14) for performing at least proportional and integral control operations from a choice of proportional, integral and derivative control operations based on control constants including at least proportional gain, integral time from a choice of proportional gain,integral time and derivative time adjusted to suppress fluctuation of the control amount value produced by the external disturbance, an adjusting unit (11,14) for performing at least proportional and integral control operations from a choice of proportional, integral and derivative control operations according to at least a given proprotional gain revision coefficient to adjust a proprotional gain of the surpressing unit from a choice of the given proprotional gain revision coefficient adjusted and a given derivative time revision coefficient to adjust a derivative time of the suppressing unit, to adjust the control amount value to the given target value, a proportinal gain revision coefficient unit (17,18) for setting a plurality of given proportional gain revision coefficients, and a coefficient selecting unit (19,20) for selecting the given proportional gain revision coefficient from among the plurality of given proportional gain revision coefficients according to the result of discriminating whether a derivative control operation of the suppressing unit is performed and whether a derivative control operation of the adjusting unit is performed. <IMAGE> |
