Chapter 7 Usage of Various Functions
7-23
The D action when a constant deviation occurred is shown as Fig. 7.6
Fig. 7.6 Derivative action with a constant deviation
The expression of D action is as following;
dt
dE
TdKpMV ×=
Derivative action is used only in PID action in which P and I actions combine with D action.
(d) PID action
PID action controls the control object with the manipulation quantity produced by (P+I+D) action
PID action when a given deviation has occurred is shown as the following Fig. 7.7.
Fig. 7.7 PID action with a constant deviation
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