An Entire Strategy for Control of a Calender Roller System. Part III: Intelligent Settling Time-optimal Control

In the transient response of the calender roller system, the settling time is expected to be short, the non-overshoot controller design needs to be reached, and good tracking property achieved. In Part I [1], the regular proportional-integral-derivative (PID) controller was designed to expedite the response of the calender roller system without steady-state error. However, the overshoot still existed. In Part II [2], the shaping input scheme together with the designed regular PID controller were employed to regulate the calender roller system input, so as to generate system non-overshoot and shorten the settling time. In this paper, the expert system (ES) method combined with the designed regular PID controller, as designed in Part I [1], were used to design the calender roller system. It could be shown that it not only effectively eliminated the steady state error, but also shortened the settling time. The effectiveness of achieving settling time-optimal of the calender system from the expert system could be shown from the computer simulation.