摘要 |
A plant control device according to the present invention includes a feedback controller and a reference governor. The feedback controller is configured to determine a control input of a plant by feedback control so as to bring an output value of a control amount of the plant close to a target value. The reference governor is configured to calculate a future predicted value of a specific state quantity of the plant by using a model of a closed loop system including the plant and the feedback controller, and correct the target value that is given to the feedback controller based on the predicted value of the specific state quantity and a constraint that is imposed on the specific state quantity. In more detail, the reference governor is configured to search for an optimal value of an evaluation function that is expressed by an objective function with a corrected target value candidate as a variable, and a penalty function that adds a penalty to the objective function when the predicted value of the specific state quantity conflicts with the constraint, and determine a corrected target value candidate that optimizes the evaluation function as a corrected target value. |