Controlling device and method
AssigneeAzbil Corporation
InventorMasato Tanaka
Life of this patent
Estimating the term…
Abstract
A controlling device comprises: a temperature ramp-up time estimating portion for estimating a required temperature ramp-up time for the controlled quantity in each individual control loop to reach a set point when the operating quantity output upper limit value of each individual control loop has been sent to a specified output upper limit value; a required output estimating portion for estimating, for each individual control loop, a required operating quantity output for the controlled quantity to reach the set point within the temperature ramp-up time; an output upper limit value setting portion for setting, temporarily, the operating quantity output as the operating quantity output upper limit value of the individual control loop; and a controlling portion that is provided for each individual control loop.
Claims8
A controlling device comprising:
- a controlled quantity change time estimating device estimating the time required for a change in a controlled quantity for a controlled quantity PVi of each individual control loop Li to reach a set point SPi when an operating quantity output upper limit value OHi of each control loop Li has been set to a specified output upper limit value MOi when set points SPi of a plurality of control loops Li have been changed simultaneously (where i=1 through n);
- a required output estimating device estimating, for each individual control loop Li, a required operating quantity output MUi for the controlled quantity PVi to reach the set point SPi within the controlled quantity change time that is the same for each control loop Li;
- an output upper limit setting device setting the operating quantity output MUi temporarily as the operating quantity output upper limit value OHi for each individual control loop Li;
- and
- a controller, provided for each individual control loop Li, for calculating an operating quantity MVi through a control calculation by inputting the set point SPi and the controlled quantity PVi, for performing a limiting process for limiting the operating quantity MVi so as to not exceed the operating quantity output upper limit value OHi, and for outputting, to a control actuator of the corresponding control loop Li, the operating quantity MVi after the limiting process.
A controlling method comprising:
- a controlled quantity change time estimating step, performed by a controlled quantity change time estimating device, estimating the time required for a change in a controlled quantity for a controlled quantity PVi of each individual control loop Li to reach a set point SPi when an operating quantity output upper limit value OHi of each control loop Li has been set to a specified output upper limit value MOi when set points SPi of a plurality of control loops Li have been changed simultaneously (where i=1 through n);
- a required output estimating step, performed by a required output estimating device, estimating, for each individual control loop Li, a required operating quantity output MUi for the controlled quantity PVi to reach the set point SPi within the controlled quantity change time that is the same for each control loop Li;
- an output upper limit setting step, performed by an output upper limit setting device, setting the operating quantity output MUi temporarily as the operating quantity output upper limit value OHi for each individual control loop Li;
- and
- a controlling step, performed by a controller, calculating operating quantities MVi through control calculations upon inputting of the set points SPi and the control quantities PVi, for executing a limiting process to limit the operating quantities MVi so as to be no higher than the operating quantity output upper limit values OHi, and to output the operating quantities MVi, after the limiting process, to a control actuator of a corresponding control loop Li.
Dependencies are inferred from the claim text.