Which one is the main role of a PD controller?

Question

Answer

A well-tuned PD will be a lag controller, therefore it will increase the precision of the system (provided that it remains stable)

Answer

A well-tuned PD will be a lead controller, therefore it will increase the stability and speed of the system

Answer

A well-tuned PD will be a lead controller, therefore it will increase 
the precision of the system (provided that it remains stable)

Answer

A well-tuned PD will be a lag controller, therefore it will increase the stability and speed of the system

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