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Multi‐controller scheme for load rejection and set‐point tracking
Author(s) -
Guo Bingjun,
Jutan Arthur
Publication year - 2001
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.5450790518
Subject(s) - control theory (sociology) , feed forward , controller (irrigation) , compensation (psychology) , realizability , computer science , load rejection , scheme (mathematics) , open loop controller , set (abstract data type) , tracking (education) , control engineering , control (management) , engineering , mathematics , closed loop , artificial intelligence , algorithm , mechanical engineering , psychology , mathematical analysis , agronomy , pedagogy , turbine , psychoanalysis , biology , programming language
To acheive complete compensation for loads, a novel multi‐controller scheme with feedforward control is proposed. This scheme has four controllers, a set‐point controller, two load controllers, and a feedforward controller. This results in the separation of the load response from the set‐point response in a closed‐loop system. These four controllers can then be designed independently to achieve good system performance for both set‐point tracking and load rejection. One of the load controllers can be chosen as a proportional controller; this guarantees physical realizability and provides excellent compensation. The results of simulation and real time control show that the proposed multi‐controller scheme is superior to a double‐controller system and a Smith predictor in the presence of large uncertainty in process dynamics especially for load disturbances.