Electronics and Communication Engineering - Automatic Control Systems - Discussion
Discussion Forum : Automatic Control Systems - Section 1 (Q.No. 39)
39.
A negative feedback system has 
. The closed loop system is stable for
. The closed loop system is stable forAnswer: Option
Explanation:
Find characteristic equation.
Discussion:
3 comments Page 1 of 1.
Taslim said:
1 decade ago
Characteristic equation:
1+G(s).H(s) = 0.
1+ [1/(S+1)].[K/s(s+2)] = 0.
s3+3s2+2s+K = 0.
Now using ROUTH HURWITZ stability array,
(6-K)/3 >0.
So K<6.
1+G(s).H(s) = 0.
1+ [1/(S+1)].[K/s(s+2)] = 0.
s3+3s2+2s+K = 0.
Now using ROUTH HURWITZ stability array,
(6-K)/3 >0.
So K<6.
(1)
Sampada said:
5 years ago
Thanks @Taslim.
MUDAVATH BALBHEEM said:
11 months ago
But the last term says, that K>0 right as per Routh Hurwitz Stability Table.
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