Previous Year Very Short Questions of LCS (B-TECH electronics and communication engineering 4th)

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Linear control systems

Previous year question paper with solutions for Linear control systems

Our website provides solved previous year question paper for Linear control systems . Doing preparation from the previous year question paper helps you to get good marks in exams. From our LCS question paper bank, students can download solved previous year question paper. The solutions to these previous year question paper are very easy to understand.

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  1. Why feedback systems are desirable and what is the biggest disadvantage?
  2. What is linear time invariant system? Explain in brief.
  3. How do we get angle and magnitude criteria from the characteristic equation?
  4. How do you practically interpret the steady state error and time lag of a first order system subjected to ramp input?
  5. A unity feedback system has open loop transfer function G(s)= 100/[s(s+p)]. The time at which the response to a unit step input reaches its peak at /8 seconds. Find the damping coefficient for closed loop system.
  6. Find the expression for percent peak overshoot of a second order underdamped system when subjected to unit step input.
  7. If closed loop poles are present on many points of imaginary axis how does it influence stability?
  8. What are the main characteristics of lag compensation?
  9. Why magnitude and phase Bode plot use semilog paper?
  10. State Nyquist Stability Criterion.
  11. Static velocity error constant
  12. Asymptotic stability
  13. Order of system
  14. Zero state response
  15. Damping factor
  16. Mason gain formula
  17. Settling time
  18. Root locus
  19. Phase margin
  20. Quadrantal symmetry
  21. Define lumped parameter and distributed parameter control systems. Give examples.
  22. Write short note on servomechanism.
  23. Compare open Loop and closed loop control system. Give examples.
  24. Define poles, zeros, type and order of a control system, with the help of an example.
  25. Define lag networks, lead networks and lag-lead networks.
  26. State Mason's Gain Formula. Define each term clearly.
  27. Write various methods to find stability in time domain and in frequency domain separately.
  28. Define gain margin and phase margin and relate them with stability of a system.
  29. Make analogous table for rotational mechanical system and parallel RLC circuit.
  30. Define the following : State variables, state vector, state space and state equations.