Which one of the following is an advantage of a PD controller in terms of damping and natural frequency?(a) G remains fixed but natural frequency increases(b) G remains fixed but natural frequency decreases(c) Natural frequency fixed but G increases(d) Natural frequency fixed but G decreasesThe question was asked in unit test.I need to ask this question from Design Considerations for Higher-Order Systems in portion Time Response Analysis, Design Specifications and Performance Indices of Control Systems

Which one of the following is an advantage of a PD controller in terms

1.	Which one of the following is an advantage of a PD controller in terms of damping and natural frequency?(a) G remains fixed but natural frequency increases(b) G remains fixed but natural frequency decreases(c) Natural frequency fixed but G increases(d) Natural frequency fixed but G decreasesThe question was asked in unit test.I need to ask this question from Design Considerations for Higher-Order Systems in portion Time Response Analysis, Design Specifications and Performance Indices of Control Systems
Answer» Right choice is (c) NATURAL frequency FIXED but G increases To explain: COMPARING with the characteristic equation natural frequency remains fixed but the value of G that increases hence the transient response is improved.

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