Control Systems 3

What is the algebraic sum of the reference input and feedback?

• Error Signal
• Error Detector
• Controlled system
• Controlled output

Routh Hurwitz criterion gives:

• Number of roots in the right half of the s-plane
• Value of the roots
• Number of roots in the left half of the s-plane
• Number of roots in the top half of the s-plane

The characteristic equation of a system is given as 3s4+10s3+5s2+2=0. This system is :

• Stable
• Marginally stable
• Unstable
• Linear

Determine the value of K such that roots of characteristic equation given below lies to the left of the line s = -1. $s^3+10s^2+18s+K$  

• K>16 and K<9

• K<16

• 9<K<16

• K<9

Consider a characteristic equation,  $s^4+3s^3+5s^2+6s+k+10=0$ .

The condition for stability is

• K>5

• -10<K

• K>-4

• -10<K<-4

The polynomial  $s^4+Ks^3+s^2+s+1=0$  the range of K for stability is _____________

• K>5

• =-10<K

• K>-4

• K-1>0