Improved Generalized Predictive Control Algorithm with Offline and Online Identification and Its Application to Fixed Bed Reactor

摘要

An improved generalized predictive control algorithm is presented in this paper by incorporating offline identification into online identification. Unlike the existing generalized predictive control algorithms, the proposed approach divides parameters of a predictive model into the time invariant and time-varying ones, which are treated respectively by offline and online identification algorithms. Therefore, both the reliability and accuracy of the predictive model are improved. Two simulation examples of control of a fixed bed reactor show that this new algorithm is not only reliable and stable in the case of uncertainties and abnormal disturbances, but also adaptable to slow time varying processes.