In a closed-loop process control system, what is meant by the proportional mode of control? |
A) It is a control mode that produces a control action that is proportional to the gain. |
B) It is a control mode that produces a control action that is proportional to the rate at which the error is changing. |
C) It is a control mode that produces a control action that is proportional to the accumulation of error over time. |
D) It is a control mode that produces a control action that is proportional to the error. |