Chapter 6, Problem 6.25E

The staged system model for a three-stage absorber presented in Eqs. 2-73−2-75, which are instate-space form. A numerical example of the absorber model suggested by Wong and Luus has thefollowing parameters: $H=75.72\text{lb},L=40.8\text{lb}/\text{min},G=66.7\text{lb}/\text{min},a=0.72,$ and $b=0.0$ . Using the MATLABfunction ss2tf calculate the three transfer functions $\left({Y^{\prime }}_1^{}/{Y^{\prime }}_f^{},{Y^{\prime }}_2^{}/{Y^{\prime }}_f^{},{Y^{\prime }}_3^{}/{Y^{\prime }}_f^{}\right)$ for the three state variablesand the feed composition deviation ${Y^{\prime }}_f^{}$ as the input.