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If we increase D what will be the controller action?

Answers were Sorted based on User's Feedback



If we increase D what will be the controller action?..

Answer / sks

well, increasing D action for a controller can make a
controller random in error elimination because even for a
step change D generates a spike( means tries to compensate
for change very quickly). if its increased to its limits, D
action will overtake the process value change and this will
cause further offsets that I action wouldn't be able to
compensate due to its slow response against such a rapid error.

result is a quick overvalued offset !

Is This Answer Correct ?    4 Yes 0 No

If we increase D what will be the controller action?..

Answer / david

In PID
P is Propositional means it will adjust the output propositional to the error. For example a Tacho connected to a motor, to control it's Torque and RPM at a constant level.
I is Integral means calculating the area, according to the area of the error the output is adjusted. For example, the difference between positive cycle area and negative cycle area.
D is differentiation means calculating the angle difference and driving output for example
In a 3-phase system, If the load on R-phase is more than other two phases, phase angle
difference will occur so it will calculate the angle and drive output For example Auto Power factor adjuster.

Is This Answer Correct ?    0 Yes 0 No

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