Question

A system has the third-order characteristic equation 

s3+as2+bs+c=0s3+as2+bs+c=0

 where 

a,b,a,b,

 and 

cc

 are constant parameters. Determine the necessary and sufficient conditions for the system to be stable.​

Answer 1

Answer:

Determine the stability of closed loop control system whose characteristic equation is

s5+s4+2s3+2s2+11s+10=0.

a) Stable

b) Marginally stable

c) Unstable

d) None of the mentioned

Explanation:

Explanation: By Routh array s =0 and s =+j. It is having a pair of conjugate root lying on imaginary axis. System is marginally stable.

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