GATE ECE 2004 | Frequency Response Analysis Question 43 | Control Systems

GATE ECE 2004

MCQ (Single Correct Answer)

-0.6

A system has poles at 0.01 Hz, 1Hz and 80 Hz; zeroes at 5hz, 100 Hz and 200 Hz. The approximate phase of the system response at 20 Hz is

$$ - {90^0}$$

$$ {0^0}$$

$$ {90^0}$$

$$ {-180^0}$$

GATE ECE 2003

MCQ (Single Correct Answer)

-0.6

The approximate Bode magnitude plot of a minimum-phase system is shown in figure. The transfer function of the system is GATE ECE 2003 Control Systems - Frequency Response Analysis Question 35 English

GATE ECE 2003 Control Systems - Frequency Response Analysis Question 35 English

$${10^8}{{{{\left( {s + 0.1} \right)}^3}} \over {{{\left( {s + 10} \right)}^2}\left( {s + 100} \right)}}$$

$${10^7}{{{{\left( {s + 0.1} \right)}^3}} \over {{{\left( {s + 10} \right)}}\left( {s + 100} \right)}}$$

$${10^8}{{{{\left( {s + 0.1} \right)}^2}} \over {{{\left( {s + 10} \right)}^2}\left( {s + 100} \right)}}$$

$${10^9}{{{{\left( {s + 0.1} \right)}^3}} \over {\left( {s + 10} \right){{\left( {s + 100} \right)}^2}}}$$

GATE ECE 2003

MCQ (Single Correct Answer)

-0.6

The gain margin and the phase margin of a feedback system with G(s)H(s)=$${s \over {{{\left( {s + 100} \right)}^3}}}$$ are

0 dB, $${0^0}$$

$$\infty ,\infty $$

$$\infty ,{0^0}$$

88.5 dB, $$\infty $$

GATE ECE 2002

MCQ (Single Correct Answer)

-0.6

The system with the open loop transfer function G(s)H(s)=$${1 \over {s\left( {{s^2} + s + 1} \right)}},$$ has a gain margin of

-6 dB

0 dB

3.5 dB

6 dB

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