CONDITION ESTIMATION APPARATUS CONTROL VALVE CONDITION ESTIMATION PROGRAM AND CONDITION ESTIMATION METHOD

摘要

A technique for accurately estimating the state of a control valve is provided. The state estimating device 400 includes a target position or an actual position of the first movable part in a control valve that controls the flow rate of the working fluid according to the position of the first movable part, and a second position that changes the position according to the flow rate of the working fluid. It comprises an acquisition part which acquires the actual position of a movable part, and an estimation part which estimates the leakage amount of a working fluid based on the information acquired by the acquisition part.