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Electronic Instrumentation and Control: Stability Analysis In Time Domain
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Electronic Instrumentation and Control: Stability Analysis In Time Domain
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25 Questions

1. Determine the condition for the stability of unity feedback control system whose open loop transfer function is given by
G(s) = 2e-st/s(s+2)
2. For non-linear systems stability cannot be determined due to:
3. Consider the following statement regarding Routh Hurwitz criterion:
4. The characteristic equation of a system is given by3s4+10s3+5s2+2=0. This system is:
5. Roots on the imaginary axis makes the system :
6. If root of the characteristic equation has positive real part the system is :
7. The characteristic equation of a control system is given as 1+ K(s+4)/s(s+7)(s2+2s+2)=0. The real axis intercept for root locus asymptote is:
8. If the gain of the system is reduced to a zero value, the roots of the system in the s-plane,
9. When the number of poles is equal to the number of zeroes, how many branches of root locus tends towards infinity?
10. A linear system can be classified as :
11. Determine the centroid of the root locus for the system having G(s)H(s) = K/(s+1)(s2+4s+5)
12. If the impulse response in absolutely integrable then the system is :
13. With reference to root locus, the complex conjugate roots of the characteristic equation of the O.L.T.F. given below G(s)H(s) =K(s+3)/(s+1)2, lie on
14. Number of roots of characteristic equation is equal to the number of ______________
15. A system with unity feedback having open loop transfer function as G(s) = K(s+1)/s3+as2+2s+1. What values of '
16. Which one of the following statements is not correct?
17. The necessary condition for the stability of the linear system is that all the coefficients of characteristic equation 1+G(s)H(s) =0, be real and have the :
18. The addition of open loop zero pulls the root loci towards:
19. If a feedback control system has its open loop transfer function G(s)H(s) = K/(s-2)(s2+3s+5) has the root locus plot which intersects the imaginary axis at s =0, then the value of K at this point will be
20. The addition of open loop poles pulls the root locus towards:
21. Consider the following statement:
22. ___________ is a quantitative measure of how fast the transients die out in the system.
23. Consider a negative feedback system where G(s) =1/(s+1) and H(s) =K/s(s+2). The closed loop system is stable for
24. The characteristic equation of a system is given as3s4+10s3+5s2+2=0. This system is :
25. Which of the test signals are best utilized by the stability analysis.

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