Control device and control method

A control device, comprising:

• processing circuitry configured to
• detect a timing at which an event indicating a change in a target setpoint or an event indicating application of a disturbance occurs, as a generation start timing at which generation of a path of a generation setpoint is started;
• determine the path of the generation setpoint in response to determination of the generation start timing at which generation of the path of the generation setpoint is started and outputs, in every control cycle, the generation setpoint that follows the determined path;
• and
• in every control cycle, calculate a manipulated variable by performing control computation using a process variable and the generation setpoint as input values and output the manipulated variable to a control target,
• wherein the processing circuitry is further configured to determine the path of the generation setpoint to make the generation setpoint reach the target setpoint in a setpoint reaching period specified in advance, the generation setpoint being changed in accordance with a curved path, and an amount of change in the generation setpoint gradually become zero.