SHORT QUESTIONS
1. Define transfer function of a linear time invariant system?
2. Distinguish between open loop and closed loop system
3. What is the role of Mason’s gain formula in a Signal-Flow Graph?
4. Define transfer function
5. Define steady state error for a unity feedback system.
6. What is transient response & steady state response?
7. Define Damping ratio
8. State the basic requirement on Routh array elements for stability.
9. Define Resonant Peak ∆r , resonant frequency ∆f
10. Define Gain Margin
11. Define phase margin.
12. Why derivative controller is not used in control systems?
13. What is the effect of PD, PI controller on system performance?
14. What is meant by tuning of a PID controller?
15. What are the advantages of state space analysis?
16. What is a state variable?
17. Define controllability of a linear time invariant system.
18. What is Observability?
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