Control System-1 Past Year University Question Of Unit-4

         Vision Institute of Technology, Kanpur

2015-16

1. What is dominant pole pair.
2. Explain phase margin.
3. Determine the ranges of K such that the characteristic equation S³+3(K+1)S²+(7K+5)S+4K+7=0 has more negative than s= -1
4. What is meant by the term magnitude criterion with reference to root locus technique? Sketch the root locus for the system with
   

2016-17

1. State angle & magnitude criteria in root locus
2. Sketch the root loci for the open loop transfer function given below
   

2017-18

1. Define gain cross over frequency & Phase cross over frequency?
2. What is corner frequency & What is Band width?
3. List the time domain specifications.
4. What is an asymptote.
5. What is the necessary condition for stability?
6. The unity feedback system is characterized by an open loop transfer function is G(S)= K /S(S+10).Determine the gain K ,so that the system will have a damping ratio of 0.5.For this value of K, determine settling time,Peak overshoot and time to Peak overshoot for a unit-step input.

2018-19

1. Determine the ranges of K such that the characteristics equation
   
   has roots more negative than s= -1
2. Determine the type and order of the unity feedback control systems whose open-loop transfer functions is
   
   
3. What is phase margin and gain margin?
4. Discuss Nyquist Stability criterion in detail. Also sketch the Nyquist plot for the system with TF
   

          Comment on the stability and find the value of gain margin.