Answer to Question #233468 in Chemical Engineering for Lok

Question

The transfer function of the process, a measuring element and a control valve is given respectively byGp =4/4S+1,Gm=2/2S+1 and Gv=1.5/4S+1. A proportional controller with gain one is used. Find the steady state error for step change of magnitude 3 in the set point. Determine the stability of the process using Routh- Huwritz criteria. If unstable, find two roots that lie on the right hand side of imaginary axis.

Answer 1

Which is expressed as :

 

 

Expressed as