Title :
Dynamic transition control structure for a class of SISO nonlinear systems [chemical processes]
Author :
Sun, Debin ; Hoo, Karlene A.
Author_Institution :
South Carolina Univ., Columbia, SC, USA
fDate :
9/1/1999 12:00:00 AM
Abstract :
Most chemical processes are nonlinear in nature and large setpoint changes or load disturbances make such processes more challenging for control. Earlier a simple transition control structure was introduced so that the tradeoff between nominal performance and robust stability of the model with large uncertainties is converted into the development of several models with small uncertainties in such a way that the former problem can be solved satisfactorily. In this work, a modification to that transition control structure is proposed to address nonlinear systems. The performance of this transition control structure is demonstrated on a nonlinear pH neutralization process. The simulation results show that the proposed structure has good properties not only for setpoint changes but also for disturbance rejection
Keywords :
chemical technology; nonlinear control systems; pH control; process control; robust control; uncertain systems; SISO nonlinear systems; chemical processes; disturbance rejection; dynamic transition control structure; large setpoint changes; load disturbances; nominal performance; nonlinear pH neutralization process; robust stability; Control system synthesis; Control systems; Inductors; Nonlinear control systems; Nonlinear systems; Performance analysis; Stability; Sun; Temperature control; Uncertainty;
Journal_Title :
Control Systems Technology, IEEE Transactions on