Step Response

Figure $3$ Closed Loop Response for Composition Control System

The plug flow reactor equipped with a composition control system is used to convert naphtha

to ethylene. The controller setting used for composition control system is $Kc=40,I=10$ s$.$

The new set point is set to $1$ molar fraction.

a$)$ Explain the type of process response shown in Figure $3.$

b$)$ Propose a suitable tuning rule for the above response and elaborate the procedure

involves from open loop test to tuning rules implementation that will minimize rise and

settling time when set point change is made.help