Actual pid controller, D component with delay, Function of the real pid controller – Burkert Type 8635 User Manual
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G
ENERAL
R
ULES
(A
PPENDIX
)
Actual PID controller
D component with delay
In the process controller of the positioner, the D component is realized with a delay T.
Function:
T + Y = Kd
Tn
Kp Xd
t
Y
Kp Tv
T
t
X
Xd
Function of the real PID controller
T + Y = Kp (Xd +
∫∫∫∫∫ Xd dt + Tv )
Step response of the real PID controller
Xd
T
T
t
Y
t
X
Xd
dY
dt
dXd
dt
Superimposing the P, I and DT components
dY
dt
1
Tn
dXd
dt
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