Home » Uncategorized » Lead – Lag compensator previous GATE questions

Lead – Lag compensator previous GATE questions

Advertisements

GATE EC-2012

The transfer function of  a compensator is given by  G_c(s)=\frac{s+a}{s+b}

  1.  G_c(s) is a lead compensator if

A) a=1, b=2     B) a=3,b=2       C) a=-3 b=-1        d) a=3, b=1

 

2. The phase of the above lead compensator is maximum at

a)  \sqrt{3}              b) \sqrt{2}          c) \sqrt{6}    d) \sqrt{1/3}

 

3) The open loop transfer function of a plant is given as G(s)=\frac{1}{s^2-1}. If the plant is operated in a unity feedback configuration, then the lead compensator that can stabilize this control system is

a) 10 \frac{s-1}{s+2}                                b) 10 \frac{s-1}{s+2}

c) 10 \frac{s+2}{s+10}                                       d) 2 \frac{s+2}{s+10}

 

4) The transfer function of a phase lead compensator is given by G_c(s)= \frac{1+3Ts}{1+Ts} where T>0 . The maximum phase shift produced by such compensator is(in degrees)

a) 90             b) 30          c) 45            d) 60

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: