The transfer function of a lead controller is 1+20s/1+5s. The high frequency magnitude of the lead controller to dB is ___________(a) 1(b) 2(c) 3(d) 4This question was posed to me at a job interview.I need to ask this question from Cascade Compensation in Frequency Domain topic in portion Design of Control Systems

The transfer function of a lead controller is 1+20s/1+5s. The high fre

1.	The transfer function of a lead controller is 1+20s/1+5s. The high frequency magnitude of the lead controller to dB is ___________(a) 1(b) 2(c) 3(d) 4This question was posed to me at a job interview.I need to ask this question from Cascade Compensation in Frequency Domain topic in portion Design of Control Systems
Answer» The correct option is (d) 4 To explain I would say: G(s) = Tp (1+Tds)/s^2 It is type-2 FUNCTION. The type-2 function has a FINITE steady STATE ERROR for unit-parabolic input.

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