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Ali & Rashid | 91

(c) Increase yi to 100% system characteristics. Several scenarios have been
implemented for the experiments to validate the
(d) Decrease yi to zero% recommended system in the presence of some common
Fig. 13: Continued. disturbances or changes in industrial applications, such as
TABLE 5 reducing feed inlet to the drum or failure with either the inlet
or outlet control valve, and observed how the control system
STEP-RESPONSE CHARACTERISTICS FOR SYSTEM IN FIG. 13 responded to these disturbances. The results show, the
performance has improved of the system in the case of using
Parameter m2 = 250 m2=1000 yi=100% yi=0% a PI controller, further, the system resists sudden
kmole/h kmole/h 116.54 116.54 disturbances in case of using the PI controller. In the case of
Rise Time 116.54 116.54 1642.7 5780 using PID controller as PI controller, the performance of the
1629 5766.1 system is superior to the other methods in respect to more
Transient 2637.5 194.44 36.00 36.00 resistance to disturbances cases and others such as easy to
Time implementation and configuration as well less time to get
Settling 2626.3 193.60 best values for PI parameters.
Time
36.00 36.00 ACKNOWLEDGMENT
SettlingMin
The authors would like to thank south refineries
SettlingMax 41.04 40.72 40.39 41.79 company, Iraq, Basrah: info@src.gov.iq /src.gov.iq for their
contributions to the creation of the work displayed.
Overshoot 0.98% 1.82% 0.98% 4.47%
CONFLICT OF INTEREST
Undershoot 0 0 00
The authors have no conflict of relevant interest to this
Peak 40.39 40.72 40.39 41.79 article.

Peak Time 388 6193 388 4923 REFERENCES

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